diff --git a/Userland/Libraries/LibGUI/Application.cpp b/Userland/Libraries/LibGUI/Application.cpp
index d0006b8ca8..05d761bc83 100644
--- a/Userland/Libraries/LibGUI/Application.cpp
+++ b/Userland/Libraries/LibGUI/Application.cpp
@@ -29,9 +29,9 @@ public:
     {
         m_label->set_text(move(tooltip));
         int tooltip_width = m_label->effective_min_size().width().as_int() + 10;
-        int line_count = m_label->text().count("\n"sv);
+        int line_count = m_label->text().bytes_as_string_view().count_lines();
         int font_size = m_label->font().pixel_size_rounded_up();
-        int tooltip_height = font_size * (1 + line_count) + ((font_size + 1) / 2) * line_count + 8;
+        int tooltip_height = font_size * line_count + ((font_size + 1) / 2) * (line_count - 1) + 8;
 
         Gfx::IntRect desktop_rect = Desktop::the().rect();
         if (tooltip_width > desktop_rect.width())
diff --git a/Userland/Libraries/LibGUI/Label.cpp b/Userland/Libraries/LibGUI/Label.cpp
index 59e8af5412..6e715bce51 100644
--- a/Userland/Libraries/LibGUI/Label.cpp
+++ b/Userland/Libraries/LibGUI/Label.cpp
@@ -96,7 +96,7 @@ int Label::text_calculated_preferred_width() const
 
 int Label::text_calculated_preferred_height() const
 {
-    return static_cast<int>(ceilf(font().preferred_line_height()) * (m_text.count("\n"sv) + 1));
+    return static_cast<int>(ceilf(font().preferred_line_height()) * m_text.bytes_as_string_view().count_lines());
 }
 
 Optional<UISize> Label::calculated_preferred_size() const