diff --git a/Userland/Libraries/LibJS/Console.cpp b/Userland/Libraries/LibJS/Console.cpp
index 197f4ed69e..8de157dc6c 100644
--- a/Userland/Libraries/LibJS/Console.cpp
+++ b/Userland/Libraries/LibJS/Console.cpp
@@ -443,7 +443,7 @@ ThrowCompletionOr<String> Console::value_vector_to_string(Vector<Value>& values)
 ThrowCompletionOr<String> Console::format_time_since(Core::ElapsedTimer timer)
 {
     auto elapsed_ms = timer.elapsed_time().to_milliseconds();
-    auto duration = TRY(Temporal::balance_duration(global_object(), 0, 0, 0, 0, elapsed_ms, 0, *js_bigint(vm(), "0"_sbigint), "year"));
+    auto duration = TRY(Temporal::balance_duration(global_object(), 0, 0, 0, 0, elapsed_ms, 0, "0"_sbigint, "year"));
 
     auto append = [&](StringBuilder& builder, auto format, auto... number) {
         if (!builder.is_empty())
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/CalendarPrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/CalendarPrototype.cpp
index d235c42e7b..cee75fcead 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/CalendarPrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/CalendarPrototype.cpp
@@ -174,11 +174,9 @@ JS_DEFINE_NATIVE_FUNCTION(CalendarPrototype::date_add)
     // 7. Let overflow be ? ToTemporalOverflow(options).
     auto overflow = TRY(to_temporal_overflow(global_object, *options));
 
-    // FIXME: Narrowing conversion from 'double' to 'i64'
-    auto* nanoseconds = js_bigint(vm, Crypto::SignedBigInteger::create_from(duration->nanoseconds()));
-
     // 8. Let balanceResult be ! BalanceDuration(duration.[[Days]], duration.[[Hours]], duration.[[Minutes]], duration.[[Seconds]], duration.[[Milliseconds]], duration.[[Microseconds]], duration.[[Nanoseconds]], "day").
-    auto balance_result = MUST(balance_duration(global_object, duration->days(), duration->hours(), duration->minutes(), duration->seconds(), duration->milliseconds(), duration->microseconds(), *nanoseconds, "day"sv));
+    // FIXME: Narrowing conversion from 'double' to 'i64'
+    auto balance_result = MUST(balance_duration(global_object, duration->days(), duration->hours(), duration->minutes(), duration->seconds(), duration->milliseconds(), duration->microseconds(), Crypto::SignedBigInteger::create_from(duration->nanoseconds()), "day"sv));
 
     // 9. Let result be ? AddISODate(date.[[ISOYear]], date.[[ISOMonth]], date.[[ISODay]], duration.[[Years]], duration.[[Months]], duration.[[Weeks]], balanceResult.[[Days]], overflow).
     auto result = TRY(add_iso_date(global_object, date->iso_year(), date->iso_month(), date->iso_day(), duration->years(), duration->months(), duration->weeks(), balance_result.days, overflow));
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/Duration.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/Duration.cpp
index 11a0890354..a18c3f8bfe 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/Duration.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/Duration.cpp
@@ -424,7 +424,7 @@ Crypto::SignedBigInteger total_duration_nanoseconds(double days, double hours, d
 }
 
 // 7.5.18 BalanceDuration ( days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds, largestUnit [ , relativeTo ] ), https://tc39.es/proposal-temporal/#sec-temporal-balanceduration
-ThrowCompletionOr<TimeDurationRecord> balance_duration(GlobalObject& global_object, double days, double hours, double minutes, double seconds, double milliseconds, double microseconds, BigInt const& nanoseconds, String const& largest_unit, Object* relative_to)
+ThrowCompletionOr<TimeDurationRecord> balance_duration(GlobalObject& global_object, double days, double hours, double minutes, double seconds, double milliseconds, double microseconds, Crypto::SignedBigInteger const& nanoseconds, String const& largest_unit, Object* relative_to)
 {
     auto& vm = global_object.vm();
 
@@ -436,7 +436,7 @@ ThrowCompletionOr<TimeDurationRecord> balance_duration(GlobalObject& global_obje
         auto& relative_to_zoned_date_time = static_cast<ZonedDateTime&>(*relative_to);
 
         // a. Let endNs be ? AddZonedDateTime(relativeTo.[[Nanoseconds]], relativeTo.[[TimeZone]], relativeTo.[[Calendar]], 0, 0, 0, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds).
-        auto* end_ns = TRY(add_zoned_date_time(global_object, relative_to_zoned_date_time.nanoseconds(), &relative_to_zoned_date_time.time_zone(), relative_to_zoned_date_time.calendar(), 0, 0, 0, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds.big_integer().to_double()));
+        auto* end_ns = TRY(add_zoned_date_time(global_object, relative_to_zoned_date_time.nanoseconds(), &relative_to_zoned_date_time.time_zone(), relative_to_zoned_date_time.calendar(), 0, 0, 0, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds.to_double()));
 
         // b. Set nanoseconds to endNs − relativeTo.[[Nanoseconds]].
         total_nanoseconds_bigint = js_bigint(vm, end_ns->big_integer().minus(relative_to_zoned_date_time.nanoseconds().big_integer()));
@@ -444,7 +444,7 @@ ThrowCompletionOr<TimeDurationRecord> balance_duration(GlobalObject& global_obje
     // 3. Else,
     else {
         // a. Set nanoseconds to ℤ(! TotalDurationNanoseconds(days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds, 0)).
-        total_nanoseconds_bigint = js_bigint(vm, total_duration_nanoseconds(days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds.big_integer(), 0));
+        total_nanoseconds_bigint = js_bigint(vm, total_duration_nanoseconds(days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds, 0));
     }
 
     // 4. If largestUnit is one of "year", "month", "week", or "day", then
@@ -992,8 +992,7 @@ ThrowCompletionOr<DurationRecord> add_duration(GlobalObject& global_object, doub
 
         // b. Let result be ! BalanceDuration(d1 + d2, h1 + h2, min1 + min2, s1 + s2, ms1 + ms2, mus1 + mus2, ns1 + ns2, largestUnit).
         // FIXME: Narrowing conversion from 'double' to 'i64'
-        auto* added_nanoseconds_bigint = js_bigint(vm, Crypto::SignedBigInteger::create_from(nanoseconds1 + nanoseconds2));
-        auto result = MUST(balance_duration(global_object, days1 + days2, hours1 + hours2, minutes1 + minutes2, seconds1 + seconds2, milliseconds1 + milliseconds2, microseconds1 + microseconds2, *added_nanoseconds_bigint, largest_unit));
+        auto result = MUST(balance_duration(global_object, days1 + days2, hours1 + hours2, minutes1 + minutes2, seconds1 + seconds2, milliseconds1 + milliseconds2, microseconds1 + microseconds2, Crypto::SignedBigInteger::create_from(nanoseconds1 + nanoseconds2), largest_unit));
 
         // c. Return ? CreateDurationRecord(0, 0, 0, result.[[Days]], result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]]).
         return create_duration_record(global_object, 0, 0, 0, result.days, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds);
@@ -1041,8 +1040,7 @@ ThrowCompletionOr<DurationRecord> add_duration(GlobalObject& global_object, doub
 
         // m. Let result be ! BalanceDuration(dateDifference.[[Days]], h1 + h2, min1 + min2, s1 + s2, ms1 + ms2, mus1 + mus2, ns1 + ns2, largestUnit).
         // FIXME: Narrowing conversion from 'double' to 'i64'
-        auto* added_nanoseconds_bigint = js_bigint(vm, Crypto::SignedBigInteger::create_from(nanoseconds1 + nanoseconds2));
-        auto result = MUST(balance_duration(global_object, date_difference->days(), hours1 + hours2, minutes1 + minutes2, seconds1 + seconds2, milliseconds1 + milliseconds2, microseconds1 + microseconds2, *added_nanoseconds_bigint, largest_unit));
+        auto result = MUST(balance_duration(global_object, date_difference->days(), hours1 + hours2, minutes1 + minutes2, seconds1 + seconds2, milliseconds1 + milliseconds2, microseconds1 + microseconds2, Crypto::SignedBigInteger::create_from(nanoseconds1 + nanoseconds2), largest_unit));
 
         // n. Return ? CreateDurationRecord(dateDifference.[[Years]], dateDifference.[[Months]], dateDifference.[[Weeks]], result.[[Days]], result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]]).
         return create_duration_record(global_object, date_difference->years(), date_difference->months(), date_difference->weeks(), result.days, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds);
@@ -1069,7 +1067,7 @@ ThrowCompletionOr<DurationRecord> add_duration(GlobalObject& global_object, doub
         auto* diff_ns = difference_instant(global_object, relative_to.nanoseconds(), *end_ns, 1, "nanosecond"sv, "halfExpand"sv);
 
         // b. Let result be ! BalanceDuration(0, 0, 0, 0, 0, 0, diffNs, largestUnit).
-        auto result = MUST(balance_duration(global_object, 0, 0, 0, 0, 0, 0, *diff_ns, largest_unit));
+        auto result = MUST(balance_duration(global_object, 0, 0, 0, 0, 0, 0, diff_ns->big_integer(), largest_unit));
 
         // c. Return ? CreateDurationRecord(0, 0, 0, 0, result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]]).
         return create_duration_record(global_object, 0, 0, 0, 0, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds);
@@ -1587,7 +1585,7 @@ ThrowCompletionOr<DurationRecord> adjust_rounded_duration_days(GlobalObject& glo
     auto adjusted_date_duration = TRY(add_duration(global_object, years, months, weeks, days, 0, 0, 0, 0, 0, 0, 0, 0, 0, direction, 0, 0, 0, 0, 0, 0, &relative_to));
 
     // 12. Let adjustedTimeDuration be ? BalanceDuration(0, 0, 0, 0, 0, 0, timeRemainderNs, "hour").
-    auto adjusted_time_duration = TRY(balance_duration(global_object, 0, 0, 0, 0, 0, 0, *js_bigint(vm, move(time_remainder_ns)), "hour"sv));
+    auto adjusted_time_duration = TRY(balance_duration(global_object, 0, 0, 0, 0, 0, 0, time_remainder_ns, "hour"sv));
 
     // 13. Return ! CreateDurationRecord(adjustedDateDuration.[[Years]], adjustedDateDuration.[[Months]], adjustedDateDuration.[[Weeks]], adjustedDateDuration.[[Days]], adjustedTimeDuration.[[Hours]], adjustedTimeDuration.[[Minutes]], adjustedTimeDuration.[[Seconds]], adjustedTimeDuration.[[Milliseconds]], adjustedTimeDuration.[[Microseconds]], adjustedTimeDuration.[[Nanoseconds]]).
     return create_duration_record(adjusted_date_duration.years, adjusted_date_duration.months, adjusted_date_duration.weeks, adjusted_date_duration.days, adjusted_time_duration.hours, adjusted_time_duration.minutes, adjusted_time_duration.seconds, adjusted_time_duration.milliseconds, adjusted_time_duration.microseconds, adjusted_time_duration.nanoseconds);
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/Duration.h b/Userland/Libraries/LibJS/Runtime/Temporal/Duration.h
index 105fa062da..6d9adb0db4 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/Duration.h
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/Duration.h
@@ -149,7 +149,7 @@ ThrowCompletionOr<Duration*> create_temporal_duration(GlobalObject&, double year
 Duration* create_negated_temporal_duration(GlobalObject& global_object, Duration const& duration);
 ThrowCompletionOr<double> calculate_offset_shift(GlobalObject&, Value relative_to_value, double years, double months, double weeks, double days, double hours, double minutes, double seconds, double milliseconds, double microseconds, double nanoseconds);
 Crypto::SignedBigInteger total_duration_nanoseconds(double days, double hours, double minutes, double seconds, double milliseconds, double microseconds, Crypto::SignedBigInteger const& nanoseconds, double offset_shift);
-ThrowCompletionOr<TimeDurationRecord> balance_duration(GlobalObject&, double days, double hours, double minutes, double seconds, double milliseconds, double microseconds, BigInt const& nanoseconds, String const& largest_unit, Object* relative_to = nullptr);
+ThrowCompletionOr<TimeDurationRecord> balance_duration(GlobalObject&, double days, double hours, double minutes, double seconds, double milliseconds, double microseconds, Crypto::SignedBigInteger const& nanoseconds, String const& largest_unit, Object* relative_to = nullptr);
 ThrowCompletionOr<DateDurationRecord> unbalance_duration_relative(GlobalObject&, double years, double months, double weeks, double days, String const& largest_unit, Value relative_to);
 ThrowCompletionOr<DateDurationRecord> balance_duration_relative(GlobalObject&, double years, double months, double weeks, double days, String const& largest_unit, Value relative_to);
 ThrowCompletionOr<DurationRecord> add_duration(GlobalObject&, double years1, double months1, double weeks1, double days1, double hours1, double minutes1, double seconds1, double milliseconds1, double microseconds1, double nanoseconds1, double years2, double months2, double weeks2, double days2, double hours2, double minutes2, double seconds2, double milliseconds2, double microseconds2, double nanoseconds2, Value relative_to_value);
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/DurationPrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/DurationPrototype.cpp
index 177593b2f9..164a118b9f 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/DurationPrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/DurationPrototype.cpp
@@ -453,8 +453,7 @@ JS_DEFINE_NATIVE_FUNCTION(DurationPrototype::round)
 
     // 26. Let result be ? BalanceDuration(balanceResult.[[Days]], adjustResult.[[Hours]], adjustResult.[[Minutes]], adjustResult.[[Seconds]], adjustResult.[[Milliseconds]], adjustResult.[[Microseconds]], adjustResult.[[Nanoseconds]], largestUnit, relativeTo).
     // FIXME: Narrowing conversion from 'double' to 'i64'
-    auto* adjust_result_nanoseconds = js_bigint(vm, Crypto::SignedBigInteger::create_from(adjust_result.nanoseconds));
-    auto result = TRY(balance_duration(global_object, balance_result.days, adjust_result.hours, adjust_result.minutes, adjust_result.seconds, adjust_result.milliseconds, adjust_result.microseconds, *adjust_result_nanoseconds, *largest_unit, relative_to.is_object() ? &relative_to.as_object() : nullptr));
+    auto result = TRY(balance_duration(global_object, balance_result.days, adjust_result.hours, adjust_result.minutes, adjust_result.seconds, adjust_result.milliseconds, adjust_result.microseconds, Crypto::SignedBigInteger::create_from(adjust_result.nanoseconds), *largest_unit, relative_to.is_object() ? &relative_to.as_object() : nullptr));
 
     // 27. Return ! CreateTemporalDuration(balanceResult.[[Years]], balanceResult.[[Months]], balanceResult.[[Weeks]], result.[[Days]], result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]]).
     return MUST(create_temporal_duration(global_object, balance_result.years, balance_result.months, balance_result.weeks, result.days, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds));
@@ -508,7 +507,7 @@ JS_DEFINE_NATIVE_FUNCTION(DurationPrototype::total)
     }
 
     // 11. Let balanceResult be ? BalanceDuration(unbalanceResult.[[Days]], duration.[[Hours]], duration.[[Minutes]], duration.[[Seconds]], duration.[[Milliseconds]], duration.[[Microseconds]], duration.[[Nanoseconds]], unit, intermediate).
-    auto balance_result = TRY(balance_duration(global_object, unbalance_result.days, duration->hours(), duration->minutes(), duration->seconds(), duration->milliseconds(), duration->microseconds(), *js_bigint(vm, Crypto::SignedBigInteger::create_from(duration->nanoseconds())), unit, intermediate));
+    auto balance_result = TRY(balance_duration(global_object, unbalance_result.days, duration->hours(), duration->minutes(), duration->seconds(), duration->milliseconds(), duration->microseconds(), Crypto::SignedBigInteger::create_from(duration->nanoseconds()), unit, intermediate));
 
     // 12. Let roundRecord be ? RoundDuration(unbalanceResult.[[Years]], unbalanceResult.[[Months]], unbalanceResult.[[Weeks]], balanceResult.[[Days]], balanceResult.[[Hours]], balanceResult.[[Minutes]], balanceResult.[[Seconds]], balanceResult.[[Milliseconds]], balanceResult.[[Microseconds]], balanceResult.[[Nanoseconds]], 1, unit, "trunc", relativeTo).
     auto round_record = TRY(round_duration(global_object, unbalance_result.years, unbalance_result.months, unbalance_result.weeks, balance_result.days, balance_result.hours, balance_result.minutes, balance_result.seconds, balance_result.milliseconds, balance_result.microseconds, balance_result.nanoseconds, 1, unit, "trunc"sv, relative_to.is_object() ? &relative_to.as_object() : nullptr));
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/InstantPrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/InstantPrototype.cpp
index c5dc6738b1..ccd6571d68 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/InstantPrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/InstantPrototype.cpp
@@ -190,10 +190,10 @@ JS_DEFINE_NATIVE_FUNCTION(InstantPrototype::until)
     auto rounding_increment = TRY(to_temporal_rounding_increment(global_object, *options, *maximum, false));
 
     // 12. Let roundedNs be ! DifferenceInstant(instant.[[Nanoseconds]], other.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode).
-    auto rounded_ns = difference_instant(global_object, instant->nanoseconds(), other->nanoseconds(), rounding_increment, *smallest_unit, rounding_mode);
+    auto* rounded_ns = difference_instant(global_object, instant->nanoseconds(), other->nanoseconds(), rounding_increment, *smallest_unit, rounding_mode);
 
     // 13. Let result be ! BalanceDuration(0, 0, 0, 0, 0, 0, roundedNs, largestUnit).
-    auto result = MUST(balance_duration(global_object, 0, 0, 0, 0, 0, 0, *rounded_ns, *largest_unit));
+    auto result = MUST(balance_duration(global_object, 0, 0, 0, 0, 0, 0, rounded_ns->big_integer(), *largest_unit));
 
     // 14. Return ? CreateTemporalDuration(0, 0, 0, 0, result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]]).
     return TRY(create_temporal_duration(global_object, 0, 0, 0, 0, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds));
@@ -234,10 +234,10 @@ JS_DEFINE_NATIVE_FUNCTION(InstantPrototype::since)
     auto rounding_increment = TRY(to_temporal_rounding_increment(global_object, *options, *maximum, false));
 
     // 12. Let roundedNs be ! DifferenceInstant(other.[[Nanoseconds]], instant.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode).
-    auto rounded_ns = difference_instant(global_object, other->nanoseconds(), instant->nanoseconds(), rounding_increment, *smallest_unit, rounding_mode);
+    auto* rounded_ns = difference_instant(global_object, other->nanoseconds(), instant->nanoseconds(), rounding_increment, *smallest_unit, rounding_mode);
 
     // 13. Let result be ! BalanceDuration(0, 0, 0, 0, 0, 0, roundedNs, largestUnit).
-    auto result = MUST(balance_duration(global_object, 0, 0, 0, 0, 0, 0, *rounded_ns, *largest_unit));
+    auto result = MUST(balance_duration(global_object, 0, 0, 0, 0, 0, 0, rounded_ns->big_integer(), *largest_unit));
 
     // 14. Return ? CreateTemporalDuration(0, 0, 0, 0, result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]]).
     return TRY(create_temporal_duration(global_object, 0, 0, 0, 0, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds));
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTime.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTime.cpp
index 3d1270e1a5..159d4110ea 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTime.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTime.cpp
@@ -353,8 +353,6 @@ ISODateTime round_iso_date_time(i32 year, u8 month, u8 day, u8 hour, u8 minute,
 // 5.5.11 DifferenceISODateTime ( y1, mon1, d1, h1, min1, s1, ms1, mus1, ns1, y2, mon2, d2, h2, min2, s2, ms2, mus2, ns2, calendar, largestUnit [ , options ] ), https://tc39.es/proposal-temporal/#sec-temporal-differenceisodatetime
 ThrowCompletionOr<DurationRecord> difference_iso_date_time(GlobalObject& global_object, i32 year1, u8 month1, u8 day1, u8 hour1, u8 minute1, u8 second1, u16 millisecond1, u16 microsecond1, u16 nanosecond1, i32 year2, u8 month2, u8 day2, u8 hour2, u8 minute2, u8 second2, u16 millisecond2, u16 microsecond2, u16 nanosecond2, Object& calendar, StringView largest_unit, Object* options)
 {
-    auto& vm = global_object.vm();
-
     // 1. If options is not present, set options to OrdinaryObjectCreate(null).
     if (!options)
         options = Object::create(global_object, nullptr);
@@ -377,7 +375,7 @@ ThrowCompletionOr<DurationRecord> difference_iso_date_time(GlobalObject& global_
         adjusted_date = balance_iso_date(adjusted_date.year, adjusted_date.month, adjusted_date.day - time_sign);
 
         // b. Set timeDifference to ? BalanceDuration(-timeSign, timeDifference.[[Hours]], timeDifference.[[Minutes]], timeDifference.[[Seconds]], timeDifference.[[Milliseconds]], timeDifference.[[Microseconds]], timeDifference.[[Nanoseconds]], largestUnit).
-        time_difference = TRY(balance_duration(global_object, -time_sign, time_difference.hours, time_difference.minutes, time_difference.seconds, time_difference.milliseconds, time_difference.microseconds, *js_bigint(vm, { (i32)time_difference.nanoseconds }), largest_unit));
+        time_difference = TRY(balance_duration(global_object, -time_sign, time_difference.hours, time_difference.minutes, time_difference.seconds, time_difference.milliseconds, time_difference.microseconds, Crypto::SignedBigInteger { (i32)time_difference.nanoseconds }, largest_unit));
     }
 
     // 7. Let date1 be ? CreateTemporalDate(adjustedDate.[[Year]], adjustedDate.[[Month]], adjustedDate.[[Day]], calendar).
@@ -396,7 +394,7 @@ ThrowCompletionOr<DurationRecord> difference_iso_date_time(GlobalObject& global_
     auto* date_difference = TRY(calendar_date_until(global_object, calendar, date1, date2, *until_options));
 
     // 12. Let balanceResult be ? BalanceDuration(dateDifference.[[Days]], timeDifference.[[Hours]], timeDifference.[[Minutes]], timeDifference.[[Seconds]], timeDifference.[[Milliseconds]], timeDifference.[[Microseconds]], timeDifference.[[Nanoseconds]], largestUnit).
-    auto balance_result = TRY(balance_duration(global_object, date_difference->days(), time_difference.hours, time_difference.minutes, time_difference.seconds, time_difference.milliseconds, time_difference.microseconds, *js_bigint(vm, { (i32)time_difference.nanoseconds }), largest_unit));
+    auto balance_result = TRY(balance_duration(global_object, date_difference->days(), time_difference.hours, time_difference.minutes, time_difference.seconds, time_difference.milliseconds, time_difference.microseconds, Crypto::SignedBigInteger { (i32)time_difference.nanoseconds }, largest_unit));
 
     // 13. Return ! CreateDurationRecord(dateDifference.[[Years]], dateDifference.[[Months]], dateDifference.[[Weeks]], balanceResult.[[Days]], balanceResult.[[Hours]], balanceResult.[[Minutes]], balanceResult.[[Seconds]], balanceResult.[[Milliseconds]], balanceResult.[[Microseconds]], balanceResult.[[Nanoseconds]]).
     return create_duration_record(date_difference->years(), date_difference->months(), date_difference->weeks(), balance_result.days, balance_result.hours, balance_result.minutes, balance_result.seconds, balance_result.milliseconds, balance_result.microseconds, balance_result.nanoseconds);
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTimePrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTimePrototype.cpp
index d5b896c7f6..960a1d2a18 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTimePrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTimePrototype.cpp
@@ -558,7 +558,7 @@ JS_DEFINE_NATIVE_FUNCTION(PlainDateTimePrototype::until)
     auto round_result = TRY(round_duration(global_object, diff.years, diff.months, diff.weeks, diff.days, diff.hours, diff.minutes, diff.seconds, diff.milliseconds, diff.microseconds, diff.nanoseconds, rounding_increment, *smallest_unit, rounding_mode, relative_to)).duration_record;
 
     // 16. Let result be ! BalanceDuration(roundResult.[[Days]], roundResult.[[Hours]], roundResult.[[Minutes]], roundResult.[[Seconds]], roundResult.[[Milliseconds]], roundResult.[[Microseconds]], roundResult.[[Nanoseconds]], largestUnit).
-    auto result = MUST(balance_duration(global_object, round_result.days, round_result.hours, round_result.minutes, round_result.seconds, round_result.milliseconds, round_result.microseconds, *js_bigint(vm, Crypto::SignedBigInteger::create_from((i64)round_result.nanoseconds)), *largest_unit));
+    auto result = MUST(balance_duration(global_object, round_result.days, round_result.hours, round_result.minutes, round_result.seconds, round_result.milliseconds, round_result.microseconds, Crypto::SignedBigInteger::create_from((i64)round_result.nanoseconds), *largest_unit));
 
     // 17. Return ? CreateTemporalDuration(roundResult.[[Years]], roundResult.[[Months]], roundResult.[[Weeks]], result.[[Days]], result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]]).
     return TRY(create_temporal_duration(global_object, round_result.years, round_result.months, round_result.weeks, result.days, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds));
@@ -615,7 +615,7 @@ JS_DEFINE_NATIVE_FUNCTION(PlainDateTimePrototype::since)
     auto round_result = TRY(round_duration(global_object, diff.years, diff.months, diff.weeks, diff.days, diff.hours, diff.minutes, diff.seconds, diff.milliseconds, diff.microseconds, diff.nanoseconds, rounding_increment, *smallest_unit, rounding_mode, relative_to)).duration_record;
 
     // 17. Let result be ! BalanceDuration(roundResult.[[Days]], roundResult.[[Hours]], roundResult.[[Minutes]], roundResult.[[Seconds]], roundResult.[[Milliseconds]], roundResult.[[Microseconds]], roundResult.[[Nanoseconds]], largestUnit).
-    auto result = MUST(balance_duration(global_object, round_result.days, round_result.hours, round_result.minutes, round_result.seconds, round_result.milliseconds, round_result.microseconds, *js_bigint(vm, Crypto::SignedBigInteger::create_from((i64)round_result.nanoseconds)), *largest_unit));
+    auto result = MUST(balance_duration(global_object, round_result.days, round_result.hours, round_result.minutes, round_result.seconds, round_result.milliseconds, round_result.microseconds, Crypto::SignedBigInteger::create_from((i64)round_result.nanoseconds), *largest_unit));
 
     // 18. Return ? CreateTemporalDuration(−roundResult.[[Years]], −roundResult.[[Months]], −roundResult.[[Weeks]], −result.[[Days]], −result.[[Hours]], −result.[[Minutes]], −result.[[Seconds]], −result.[[Milliseconds]], −result.[[Microseconds]], −result.[[Nanoseconds]]).
     return TRY(create_temporal_duration(global_object, -round_result.years, -round_result.months, -round_result.weeks, -result.days, -result.hours, -result.minutes, -result.seconds, -result.milliseconds, -result.microseconds, -result.nanoseconds));
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/PlainTimePrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/PlainTimePrototype.cpp
index bcd2bddb06..b0a97547fd 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/PlainTimePrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/PlainTimePrototype.cpp
@@ -290,7 +290,7 @@ JS_DEFINE_NATIVE_FUNCTION(PlainTimePrototype::until)
     auto rounded_result = TRY(round_duration(global_object, 0, 0, 0, 0, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds, rounding_increment, *smallest_unit, rounding_mode)).duration_record;
 
     // 13. Set result to ! BalanceDuration(0, result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]], largestUnit).
-    result = MUST(balance_duration(global_object, 0, rounded_result.hours, rounded_result.minutes, rounded_result.seconds, rounded_result.milliseconds, rounded_result.microseconds, *js_bigint(vm, { (i32)rounded_result.nanoseconds }), *largest_unit));
+    result = MUST(balance_duration(global_object, 0, rounded_result.hours, rounded_result.minutes, rounded_result.seconds, rounded_result.milliseconds, rounded_result.microseconds, Crypto::SignedBigInteger { (i32)rounded_result.nanoseconds }, *largest_unit));
 
     // 14. Return ? CreateTemporalDuration(0, 0, 0, 0, result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]]).
     return TRY(create_temporal_duration(global_object, 0, 0, 0, 0, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds));
@@ -337,7 +337,7 @@ JS_DEFINE_NATIVE_FUNCTION(PlainTimePrototype::since)
     auto rounded_result = TRY(round_duration(global_object, 0, 0, 0, 0, -result.hours, -result.minutes, -result.seconds, -result.milliseconds, -result.microseconds, -result.nanoseconds, rounding_increment, *smallest_unit, rounding_mode)).duration_record;
 
     // 14. Set result to ! BalanceDuration(0, −result.[[Hours]], −result.[[Minutes]], −result.[[Seconds]], −result.[[Milliseconds]], −result.[[Microseconds]], −result.[[Nanoseconds]], largestUnit).
-    result = MUST(balance_duration(global_object, 0, -rounded_result.hours, -rounded_result.minutes, -rounded_result.seconds, -rounded_result.milliseconds, -rounded_result.microseconds, *js_bigint(vm, { (i32)-rounded_result.nanoseconds }), *largest_unit));
+    result = MUST(balance_duration(global_object, 0, -rounded_result.hours, -rounded_result.minutes, -rounded_result.seconds, -rounded_result.milliseconds, -rounded_result.microseconds, Crypto::SignedBigInteger { (i32)-rounded_result.nanoseconds }, *largest_unit));
 
     // 15. Return ? CreateTemporalDuration(0, 0, 0, 0, result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]]).
     return TRY(create_temporal_duration(global_object, 0, 0, 0, 0, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds));
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonthPrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonthPrototype.cpp
index 7b53a0f57a..2597e50563 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonthPrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonthPrototype.cpp
@@ -247,7 +247,7 @@ JS_DEFINE_NATIVE_FUNCTION(PlainYearMonthPrototype::add)
     auto duration = TRY(to_temporal_duration_record(global_object, vm.argument(0)));
 
     // 4. Let balanceResult be ? BalanceDuration(duration.[[Days]], duration.[[Hours]], duration.[[Minutes]], duration.[[Seconds]], duration.[[Milliseconds]], duration.[[Microseconds]], duration.[[Nanoseconds]], "day").
-    auto balance_result = TRY(balance_duration(global_object, duration.days, duration.hours, duration.minutes, duration.seconds, duration.milliseconds, duration.microseconds, *js_bigint(vm, Crypto::SignedBigInteger::create_from((i64)duration.nanoseconds)), "day"sv));
+    auto balance_result = TRY(balance_duration(global_object, duration.days, duration.hours, duration.minutes, duration.seconds, duration.milliseconds, duration.microseconds, Crypto::SignedBigInteger::create_from((i64)duration.nanoseconds), "day"sv));
 
     // 5. Set options to ? GetOptionsObject(options).
     auto* options = TRY(get_options_object(global_object, vm.argument(1)));
@@ -319,7 +319,7 @@ JS_DEFINE_NATIVE_FUNCTION(PlainYearMonthPrototype::subtract)
     auto duration = TRY(to_temporal_duration_record(global_object, vm.argument(0)));
 
     // 4. Let balanceResult be ? BalanceDuration(duration.[[Days]], duration.[[Hours]], duration.[[Minutes]], duration.[[Seconds]], duration.[[Milliseconds]], duration.[[Microseconds]], duration.[[Nanoseconds]], "day").
-    auto balance_result = TRY(balance_duration(global_object, duration.days, duration.hours, duration.minutes, duration.seconds, duration.milliseconds, duration.microseconds, *js_bigint(vm, Crypto::SignedBigInteger::create_from((i64)duration.nanoseconds)), "day"sv));
+    auto balance_result = TRY(balance_duration(global_object, duration.days, duration.hours, duration.minutes, duration.seconds, duration.milliseconds, duration.microseconds, Crypto::SignedBigInteger::create_from((i64)duration.nanoseconds), "day"sv));
 
     // 5. Set options to ? GetOptionsObject(options).
     auto* options = TRY(get_options_object(global_object, vm.argument(1)));
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTime.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTime.cpp
index 44648000a6..980671a6d9 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTime.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTime.cpp
@@ -444,7 +444,7 @@ ThrowCompletionOr<DurationRecord> difference_zoned_date_time(GlobalObject& globa
     auto result = TRY(nanoseconds_to_days(global_object, *js_bigint(vm, time_remainder_ns), intermediate));
 
     // 13. Let timeDifference be ! BalanceDuration(0, 0, 0, 0, 0, 0, result.[[Nanoseconds]], "hour").
-    auto time_difference = MUST(balance_duration(global_object, 0, 0, 0, 0, 0, 0, *result.nanoseconds.cell(), "hour"sv));
+    auto time_difference = MUST(balance_duration(global_object, 0, 0, 0, 0, 0, 0, result.nanoseconds.cell()->big_integer(), "hour"sv));
 
     // 14. Return ! CreateDurationRecord(dateDifference.[[Years]], dateDifference.[[Months]], dateDifference.[[Weeks]], result.[[Days]], timeDifference.[[Hours]], timeDifference.[[Minutes]], timeDifference.[[Seconds]], timeDifference.[[Milliseconds]], timeDifference.[[Microseconds]], timeDifference.[[Nanoseconds]]).
     return create_duration_record(date_difference.years, date_difference.months, date_difference.weeks, result.days, time_difference.hours, time_difference.minutes, time_difference.seconds, time_difference.milliseconds, time_difference.microseconds, time_difference.nanoseconds);
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.cpp
index 8001636281..1f5319cf5d 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.cpp
@@ -990,7 +990,7 @@ JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::until)
         auto* difference_ns = difference_instant(global_object, zoned_date_time->nanoseconds(), other->nanoseconds(), rounding_increment, *smallest_unit, rounding_mode);
 
         // b. Let balanceResult be ! BalanceDuration(0, 0, 0, 0, 0, 0, differenceNs, largestUnit).
-        auto balance_result = MUST(balance_duration(global_object, 0, 0, 0, 0, 0, 0, *difference_ns, *largest_unit));
+        auto balance_result = MUST(balance_duration(global_object, 0, 0, 0, 0, 0, 0, difference_ns->big_integer(), *largest_unit));
 
         // c. Return ? CreateTemporalDuration(0, 0, 0, 0, balanceResult.[[Hours]], balanceResult.[[Minutes]], balanceResult.[[Seconds]], balanceResult.[[Milliseconds]], balanceResult.[[Microseconds]], balanceResult.[[Nanoseconds]]).
         return TRY(create_temporal_duration(global_object, 0, 0, 0, 0, balance_result.hours, balance_result.minutes, balance_result.seconds, balance_result.milliseconds, balance_result.microseconds, balance_result.nanoseconds));
@@ -1067,7 +1067,7 @@ JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::since)
         auto* difference_ns = difference_instant(global_object, zoned_date_time->nanoseconds(), other->nanoseconds(), rounding_increment, *smallest_unit, rounding_mode);
 
         // b. Let balanceResult be ! BalanceDuration(0, 0, 0, 0, 0, 0, differenceNs, largestUnit).
-        auto balance_result = MUST(balance_duration(global_object, 0, 0, 0, 0, 0, 0, *difference_ns, *largest_unit));
+        auto balance_result = MUST(balance_duration(global_object, 0, 0, 0, 0, 0, 0, difference_ns->big_integer(), *largest_unit));
 
         // c. Return ? CreateTemporalDuration(0, 0, 0, 0, −balanceResult.[[Hours]], −balanceResult.[[Minutes]], −balanceResult.[[Seconds]], −balanceResult.[[Milliseconds]], −balanceResult.[[Microseconds]], −balanceResult.[[Nanoseconds]]).
         return TRY(create_temporal_duration(global_object, 0, 0, 0, 0, -balance_result.hours, -balance_result.minutes, -balance_result.seconds, -balance_result.milliseconds, -balance_result.microseconds, -balance_result.nanoseconds));