diff --git a/osu.Game.Rulesets.Osu/Difficulty/OsuDifficultyCalculator.cs b/osu.Game.Rulesets.Osu/Difficulty/OsuDifficultyCalculator.cs
index c5d85602c6..2907f5f58e 100644
--- a/osu.Game.Rulesets.Osu/Difficulty/OsuDifficultyCalculator.cs
+++ b/osu.Game.Rulesets.Osu/Difficulty/OsuDifficultyCalculator.cs
@@ -69,6 +69,22 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             return readingBonus;
         }
 
+        public static double CalculateRateAdjustedApproachRate(double approachRate, double clockRate)
+        {
+            double preempt = IBeatmapDifficultyInfo.DifficultyRange(approachRate, OsuHitObject.PREEMPT_MAX, OsuHitObject.PREEMPT_MID, OsuHitObject.PREEMPT_MIN) / clockRate;
+            return IBeatmapDifficultyInfo.InverseDifficultyRange(preempt, OsuHitObject.PREEMPT_MAX, OsuHitObject.PREEMPT_MID, OsuHitObject.PREEMPT_MIN);
+        }
+
+        public static double CalculateRateAdjustedOverallDifficulty(double overallDifficulty, double clockRate)
+        {
+            HitWindows hitWindows = new OsuHitWindows();
+            hitWindows.SetDifficulty(overallDifficulty);
+
+            double hitWindowGreat = hitWindows.WindowFor(HitResult.Great) / clockRate;
+
+            return (79.5 - hitWindowGreat) / 6;
+        }
+
         protected override DifficultyAttributes CreateDifficultyAttributes(IBeatmap beatmap, Mod[] mods, Skill[] skills, double clockRate)
         {
             if (beatmap.HitObjects.Count == 0)
@@ -94,15 +110,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty
 
             double difficultSliders = aim.GetDifficultSliders();
 
-            double preempt = IBeatmapDifficultyInfo.DifficultyRange(beatmap.Difficulty.ApproachRate, 1800, 1200, 450) / clockRate;
-            double approachRate = preempt > 1200 ? (1800 - preempt) / 120 : (1200 - preempt) / 150 + 5;
-
-            HitWindows hitWindows = new OsuHitWindows();
-            hitWindows.SetDifficulty(beatmap.Difficulty.OverallDifficulty);
-
-            double hitWindowGreat = hitWindows.WindowFor(HitResult.Great) / clockRate;
-
-            double overallDifficulty = (80 - hitWindowGreat) / 6;
+            double approachRate = CalculateRateAdjustedApproachRate(beatmap.Difficulty.ApproachRate, clockRate);
+            double overallDifficulty = CalculateRateAdjustedOverallDifficulty(beatmap.Difficulty.OverallDifficulty, clockRate);
 
             int hitCircleCount = beatmap.HitObjects.Count(h => h is HitCircle);
             int sliderCount = beatmap.HitObjects.Count(h => h is Slider);
diff --git a/osu.Game.Rulesets.Osu/Difficulty/OsuPerformanceCalculator.cs b/osu.Game.Rulesets.Osu/Difficulty/OsuPerformanceCalculator.cs
index 966f8da261..49626eb7b6 100644
--- a/osu.Game.Rulesets.Osu/Difficulty/OsuPerformanceCalculator.cs
+++ b/osu.Game.Rulesets.Osu/Difficulty/OsuPerformanceCalculator.cs
@@ -5,7 +5,6 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using osu.Framework.Extensions.IEnumerableExtensions;
-using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Difficulty.Utils;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Osu.Scoring;
@@ -92,10 +91,8 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             okHitWindow = hitWindows.WindowFor(HitResult.Ok) / clockRate;
             mehHitWindow = hitWindows.WindowFor(HitResult.Meh) / clockRate;
 
-            double preempt = IBeatmapDifficultyInfo.DifficultyRange(difficulty.ApproachRate, 1800, 1200, 450) / clockRate;
-
-            overallDifficulty = (79.5 - greatHitWindow) / 6;
-            approachRate = preempt > 1200 ? (1800 - preempt) / 120 : (1200 - preempt) / 150 + 5;
+            approachRate = OsuDifficultyCalculator.CalculateRateAdjustedApproachRate(difficulty.ApproachRate, clockRate);
+            overallDifficulty = OsuDifficultyCalculator.CalculateRateAdjustedOverallDifficulty(difficulty.OverallDifficulty, clockRate);
 
             double comboBasedEstimatedMissCount = calculateComboBasedEstimatedMissCount(osuAttributes);
             double? scoreBasedEstimatedMissCount = null;