diff --git a/osu.Game.Rulesets.Osu/Scoring/OsuPerformanceCalculator.cs b/osu.Game.Rulesets.Osu/Scoring/OsuPerformanceCalculator.cs
index a12bdf7f20..aa94572cb4 100644
--- a/osu.Game.Rulesets.Osu/Scoring/OsuPerformanceCalculator.cs
+++ b/osu.Game.Rulesets.Osu/Scoring/OsuPerformanceCalculator.cs
@@ -18,7 +18,17 @@ namespace osu.Game.Rulesets.Osu.Scoring
         private readonly int beatmapMaxCombo;
 
         private Mod[] mods;
+        
+        /// <summary>
+        /// Approach rate adjusted by mods.
+        /// </summary>
         private double realApproachRate;
+        
+        /// <summary>
+        /// Overall difficulty adjusted by mods.
+        /// </summary>
+        private double realOverallDifficulty;
+        
         private double accuracy;
         private int scoreMaxCombo;
         private int count300;
@@ -58,9 +68,13 @@ namespace osu.Game.Rulesets.Osu.Scoring
                 ar = Math.Min(10, ar * 1.4);
             if (mods.Any(m => m is OsuModEasy))
                 ar = Math.Max(0, ar / 2);
-            double preEmpt = BeatmapDifficulty.DifficultyRange(ar, 1800, 1200, 450);
-            realApproachRate = preEmpt > 1200 ? (1800 - preEmpt) / 120 : (1200 - preEmpt) / 150 + 5;
 
+            double preEmpt = BeatmapDifficulty.DifficultyRange(ar, 1800, 1200, 450) / TimeRate;
+            double hitWindow300 = (Beatmap.HitObjects.First().HitWindows.Great / 2 - 0.5) / TimeRate; 
+            
+            realApproachRate = preEmpt > 1200 ? (1800 - preEmpt) / 120 : (1200 - preEmpt) / 150 + 5;
+            realOverallDifficulty = (80 - 0.5 - hitWindow300) / 6;
+            
             // Custom multipliers for NoFail and SpunOut.
             double multiplier = 1.12f; // This is being adjusted to keep the final pp value scaled around what it used to be when changing things
 
@@ -133,7 +147,7 @@ namespace osu.Game.Rulesets.Osu.Scoring
             // Scale the aim value with accuracy _slightly_
             aimValue *= 0.5f + accuracy / 2.0f;
             // It is important to also consider accuracy difficulty when doing that
-            aimValue *= 0.98f + Math.Pow(Beatmap.BeatmapInfo.BaseDifficulty.OverallDifficulty, 2) / 2500;
+            aimValue *= 0.98f + Math.Pow(realOverallDifficulty, 2) / 2500;
 
             return aimValue;
         }
@@ -159,7 +173,7 @@ namespace osu.Game.Rulesets.Osu.Scoring
             // Scale the speed value with accuracy _slightly_
             speedValue *= 0.5f + accuracy / 2.0f;
             // It is important to also consider accuracy difficulty when doing that
-            speedValue *= 0.98f + Math.Pow(Beatmap.BeatmapInfo.BaseDifficulty.OverallDifficulty, 2) / 2500;
+            speedValue *= 0.98f + Math.Pow(realOverallDifficulty, 2) / 2500;
 
             return speedValue;
         }
@@ -181,7 +195,7 @@ namespace osu.Game.Rulesets.Osu.Scoring
 
             // Lots of arbitrary values from testing.
             // Considering to use derivation from perfect accuracy in a probabilistic manner - assume normal distribution
-            double accuracyValue = Math.Pow(1.52163f, Beatmap.BeatmapInfo.BaseDifficulty.OverallDifficulty) * Math.Pow(betterAccuracyPercentage, 24) * 2.83f;
+            double accuracyValue = Math.Pow(1.52163f, realOverallDifficulty) * Math.Pow(betterAccuracyPercentage, 24) * 2.83f;
 
             // Bonus for many hitcircles - it's harder to keep good accuracy up for longer
             accuracyValue *= Math.Min(1.15f, Math.Pow(amountHitObjectsWithAccuracy / 1000.0f, 0.3f));
diff --git a/osu.Game/Beatmaps/DifficultyCalculator.cs b/osu.Game/Beatmaps/DifficultyCalculator.cs
index 37155c09cd..5cac9ed923 100644
--- a/osu.Game/Beatmaps/DifficultyCalculator.cs
+++ b/osu.Game/Beatmaps/DifficultyCalculator.cs
@@ -14,7 +14,7 @@ namespace osu.Game.Beatmaps
         protected readonly IBeatmap Beatmap;
         protected readonly Mod[] Mods;
 
-        protected double TimeRate = 1;
+        protected double TimeRate { get; private set; } = 1;
 
         protected DifficultyCalculator(IBeatmap beatmap, Mod[] mods = null)
         {
diff --git a/osu.Game/Rulesets/Scoring/PerformanceCalculator.cs b/osu.Game/Rulesets/Scoring/PerformanceCalculator.cs
index 5b8f5f0d0f..b23e06e15c 100644
--- a/osu.Game/Rulesets/Scoring/PerformanceCalculator.cs
+++ b/osu.Game/Rulesets/Scoring/PerformanceCalculator.cs
@@ -2,7 +2,11 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System.Collections.Generic;
+using System.Linq;
+using osu.Framework.Extensions.IEnumerableExtensions;
+using osu.Framework.Timing;
 using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Mods;
 
 namespace osu.Game.Rulesets.Scoring
 {
@@ -14,6 +18,8 @@ namespace osu.Game.Rulesets.Scoring
         protected readonly IBeatmap Beatmap;
         protected readonly Score Score;
 
+        protected double TimeRate { get; private set; } = 1;
+
         protected PerformanceCalculator(Ruleset ruleset, IBeatmap beatmap, Score score)
         {
             Score = score;
@@ -22,6 +28,15 @@ namespace osu.Game.Rulesets.Scoring
 
             var diffCalc = ruleset.CreateDifficultyCalculator(beatmap, score.Mods);
             diffCalc.Calculate(attributes);
+
+            ApplyMods(score.Mods);
+        }
+        
+        protected virtual void ApplyMods(Mod[] mods)
+        {
+            var clock = new StopwatchClock();
+            mods.OfType<IApplicableToClock>().ForEach(m => m.ApplyToClock(clock));
+            TimeRate = clock.Rate;
         }
 
         public abstract double Calculate(Dictionary<string, double> categoryDifficulty = null);