diff --git a/components/style/values/specified/font.rs b/components/style/values/specified/font.rs
index 5f45d81d83d..bda757440bb 100644
--- a/components/style/values/specified/font.rs
+++ b/components/style/values/specified/font.rs
@@ -15,7 +15,7 @@ use crate::values::computed::{CSSPixelLength, Context, ToComputedValue};
 use crate::values::generics::font::VariationValue;
 use crate::values::generics::font::{self as generics, FeatureTagValue, FontSettings, FontTag};
 use crate::values::generics::NonNegative;
-use crate::values::specified::length::{FontBaseSize, AU_PER_PT, AU_PER_PX};
+use crate::values::specified::length::{FontBaseSize, PX_PER_PT};
 use crate::values::specified::{AllowQuirks, Angle, Integer, LengthPercentage};
 use crate::values::specified::{NoCalcLength, NonNegativeNumber, Number, Percentage};
 use crate::values::CustomIdent;
@@ -2287,7 +2287,7 @@ impl MozScriptMinSize {
     #[inline]
     /// Calculate initial value of -moz-script-min-size.
     pub fn get_initial_value() -> Length {
-        Length::new(DEFAULT_SCRIPT_MIN_SIZE_PT as f32 * (AU_PER_PT / AU_PER_PX))
+        Length::new(DEFAULT_SCRIPT_MIN_SIZE_PT as f32 * PX_PER_PT)
     }
 }
 
diff --git a/components/style/values/specified/length.rs b/components/style/values/specified/length.rs
index f706b401b9d..7c03e8dce42 100644
--- a/components/style/values/specified/length.rs
+++ b/components/style/values/specified/length.rs
@@ -32,20 +32,18 @@ pub use super::image::Image;
 pub use super::image::{EndingShape as GradientEndingShape, Gradient};
 pub use crate::values::specified::calc::CalcLengthPercentage;
 
-/// Number of app units per pixel
-pub const AU_PER_PX: CSSFloat = 60.;
-/// Number of app units per inch
-pub const AU_PER_IN: CSSFloat = AU_PER_PX * 96.;
-/// Number of app units per centimeter
-pub const AU_PER_CM: CSSFloat = AU_PER_IN / 2.54;
-/// Number of app units per millimeter
-pub const AU_PER_MM: CSSFloat = AU_PER_IN / 25.4;
-/// Number of app units per quarter
-pub const AU_PER_Q: CSSFloat = AU_PER_MM / 4.;
-/// Number of app units per point
-pub const AU_PER_PT: CSSFloat = AU_PER_IN / 72.;
-/// Number of app units per pica
-pub const AU_PER_PC: CSSFloat = AU_PER_PT * 12.;
+/// Number of pixels per inch
+pub const PX_PER_IN: CSSFloat = 96.;
+/// Number of pixels per centimeter
+pub const PX_PER_CM: CSSFloat = PX_PER_IN / 2.54;
+/// Number of pixels per millimeter
+pub const PX_PER_MM: CSSFloat = PX_PER_IN / 25.4;
+/// Number of pixels per quarter
+pub const PX_PER_Q: CSSFloat = PX_PER_MM / 4.;
+/// Number of pixels per point
+pub const PX_PER_PT: CSSFloat = PX_PER_IN / 72.;
+/// Number of pixels per pica
+pub const PX_PER_PC: CSSFloat = PX_PER_PT * 12.;
 
 /// A font relative length.
 #[derive(Clone, Copy, Debug, MallocSizeOf, PartialEq, ToCss, ToShmem)]
@@ -407,12 +405,12 @@ impl AbsoluteLength {
 
         let pixel = match *self {
             AbsoluteLength::Px(value) => value,
-            AbsoluteLength::In(value) => value * (AU_PER_IN / AU_PER_PX),
-            AbsoluteLength::Cm(value) => value * (AU_PER_CM / AU_PER_PX),
-            AbsoluteLength::Mm(value) => value * (AU_PER_MM / AU_PER_PX),
-            AbsoluteLength::Q(value) => value * (AU_PER_Q / AU_PER_PX),
-            AbsoluteLength::Pt(value) => value * (AU_PER_PT / AU_PER_PX),
-            AbsoluteLength::Pc(value) => value * (AU_PER_PC / AU_PER_PX),
+            AbsoluteLength::In(value) => value * PX_PER_IN,
+            AbsoluteLength::Cm(value) => value * PX_PER_CM,
+            AbsoluteLength::Mm(value) => value * PX_PER_MM,
+            AbsoluteLength::Q(value) => value * PX_PER_Q,
+            AbsoluteLength::Pt(value) => value * PX_PER_PT,
+            AbsoluteLength::Pc(value) => value * PX_PER_PC,
         };
         pixel.min(f32::MAX).max(f32::MIN)
     }