diff --git a/osu.Game.Rulesets.Mania/Difficulty/ManiaDifficultyAttributes.cs b/osu.Game.Rulesets.Mania/Difficulty/ManiaDifficultyAttributes.cs
index efd5868504..5b7a460079 100644
--- a/osu.Game.Rulesets.Mania/Difficulty/ManiaDifficultyAttributes.cs
+++ b/osu.Game.Rulesets.Mania/Difficulty/ManiaDifficultyAttributes.cs
@@ -10,10 +10,10 @@ namespace osu.Game.Rulesets.Mania.Difficulty
     public class ManiaDifficultyAttributes : DifficultyAttributes
     {
         /// <summary>
-        /// The perceived hit window for a GREAT hit inclusive of rate-adjusting mods (DT/HT/etc).
+        /// The hit window for a GREAT hit inclusive of rate-adjusting mods (DT/HT/etc).
         /// </summary>
         /// <remarks>
-        /// Rate-adjusting mods don't directly affect the hit window, but have a perceived effect as a result of adjusting audio timing.
+        /// Rate-adjusting mods do not affect the hit window at all in osu-stable.
         /// </remarks>
         [JsonProperty("great_hit_window")]
         public double GreatHitWindow { get; set; }
diff --git a/osu.Game.Rulesets.Mania/Difficulty/ManiaDifficultyCalculator.cs b/osu.Game.Rulesets.Mania/Difficulty/ManiaDifficultyCalculator.cs
index 1f82eb7ccd..d200daa7fa 100644
--- a/osu.Game.Rulesets.Mania/Difficulty/ManiaDifficultyCalculator.cs
+++ b/osu.Game.Rulesets.Mania/Difficulty/ManiaDifficultyCalculator.cs
@@ -48,7 +48,7 @@ namespace osu.Game.Rulesets.Mania.Difficulty
             {
                 StarRating = skills[0].DifficultyValue() * star_scaling_factor,
                 Mods = mods,
-                GreatHitWindow = Math.Ceiling(getHitWindow300(mods) / clockRate),
+                GreatHitWindow = Math.Ceiling((int)(getHitWindow300(mods) * clockRate) / clockRate),
                 ScoreMultiplier = getScoreMultiplier(mods),
                 MaxCombo = beatmap.HitObjects.Sum(h => h is HoldNote ? 2 : 1),
             };
@@ -108,7 +108,7 @@ namespace osu.Game.Rulesets.Mania.Difficulty
             }
         }
 
-        private int getHitWindow300(Mod[] mods)
+        private double getHitWindow300(Mod[] mods)
         {
             if (isForCurrentRuleset)
             {
@@ -121,19 +121,14 @@ namespace osu.Game.Rulesets.Mania.Difficulty
 
             return applyModAdjustments(47, mods);
 
-            static int applyModAdjustments(double value, Mod[] mods)
+            static double applyModAdjustments(double value, Mod[] mods)
             {
                 if (mods.Any(m => m is ManiaModHardRock))
                     value /= 1.4;
                 else if (mods.Any(m => m is ManiaModEasy))
                     value *= 1.4;
 
-                if (mods.Any(m => m is ManiaModDoubleTime))
-                    value *= 1.5;
-                else if (mods.Any(m => m is ManiaModHalfTime))
-                    value *= 0.75;
-
-                return (int)value;
+                return value;
             }
         }