diff --git a/projects/planner/src/app/app-settings/app-settings.component.spec.ts b/projects/planner/src/app/app-settings/app-settings.component.spec.ts
index a3695791..2c61a984 100644
--- a/projects/planner/src/app/app-settings/app-settings.component.spec.ts
+++ b/projects/planner/src/app/app-settings/app-settings.component.spec.ts
@@ -85,8 +85,6 @@ describe('App settings component', () => {
 // TODO AppSettings:
 // * After changing units, also the range values need to be reloaded
 // * Add save and load last form state. Do we want this? Or together with reset to default?
-// * Apply to algorithm
-// * add to normalization service
 
 
 // TODO missing test cases:
diff --git a/projects/planner/src/app/app-settings/app-settings.component.ts b/projects/planner/src/app/app-settings/app-settings.component.ts
index 52ec19f6..160fa7cc 100644
--- a/projects/planner/src/app/app-settings/app-settings.component.ts
+++ b/projects/planner/src/app/app-settings/app-settings.component.ts
@@ -50,16 +50,12 @@ export class AppSettingsComponent implements OnInit {
         return this.inputs.controlInValid(densityControl);
     }
 
-    public get densityRounding(): number {
-        return this.units.imperialUnits ? 3 : 1;
-    }
-
     public get densityStep(): number {
-        return Math.pow(0.1, this.densityRounding);
+        return Math.pow(0.1, this.ranges.densityRounding);
     }
 
     private get maxDensity(): number {
-        return Precision.round(this.appSettings.maxGasDensity, this.densityRounding);
+        return Precision.round(this.appSettings.maxGasDensity, this.ranges.densityRounding);
     }
 
     public ngOnInit(): void {
diff --git a/projects/planner/src/app/shared/PlanUrlSerialization.spec.ts b/projects/planner/src/app/shared/PlanUrlSerialization.spec.ts
index 2afcbf34..77b26c4d 100644
--- a/projects/planner/src/app/shared/PlanUrlSerialization.spec.ts
+++ b/projects/planner/src/app/shared/PlanUrlSerialization.spec.ts
@@ -49,7 +49,7 @@ describe('Url Serialization', () => {
         const appSettings = new ApplicationSettingsService(units);
         const planner = new PlannerService(schedules, dispatcher, viewSwitch, appSettings, irrelevantFactory, units);
         const preferences = new Preferences(viewSwitch, units, schedules, appSettings, new ViewStates());
-        const normalization = new SettingsNormalizationService(units, schedules);
+        const normalization = new SettingsNormalizationService(units, appSettings, schedules);
         const urlSerialization = new PlanUrlSerialization(viewSwitch, units, normalization,
             schedules, appSettings, preferences);
         const firstDive = schedules.dives[0];
diff --git a/projects/planner/src/app/shared/UnitConversion.ts b/projects/planner/src/app/shared/UnitConversion.ts
index 3ef86089..5f1245ba 100644
--- a/projects/planner/src/app/shared/UnitConversion.ts
+++ b/projects/planner/src/app/shared/UnitConversion.ts
@@ -172,6 +172,7 @@ export interface RangeConstants {
     depthLabel: string;
     maxDensity: [number, number];
     maxDensityLabel: string;
+    densityRounding: number;
     narcoticDepth: [number, number];
     narcoticDepthLabel: string;
     lastStopDepth: [number, number];
@@ -205,6 +206,7 @@ class MetricRanges implements RangeConstants {
     public readonly durationLabel: string = toLabel(this.duration, 'min');
     public readonly maxDensity: [number, number] = [1, 10];
     public readonly maxDensityLabel: string = toLabel(this.maxDensity, this.units.densityShortcut);
+    public readonly densityRounding: number = 1;
     public readonly narcoticDepth: [number, number] = [1, 100];
     public readonly narcoticDepthLabel: string = toLabel(this.narcoticDepth, this.units.lengthShortcut);
     public readonly nitroxOxygen: [number, number] = [21, 100];
@@ -243,6 +245,7 @@ class ImperialRanges implements RangeConstants {
     public readonly durationLabel: string = toLabel(this.duration, 'min');
     public readonly maxDensity: [number, number] = [0.0624, 0.624];
     public readonly maxDensityLabel: string = toLabel(this.maxDensity, this.units.densityShortcut);
+    public readonly densityRounding: number = 4;
     public readonly narcoticDepth: [number, number] = [1, 300];
     public readonly narcoticDepthLabel: string = toLabel(this.narcoticDepth, this.units.lengthShortcut);
     public readonly nitroxOxygen: [number, number] = [21, 100];
diff --git a/projects/planner/src/app/shared/settings-normalization.service.spec.ts b/projects/planner/src/app/shared/settings-normalization.service.spec.ts
index fe1e781c..9e3d2ac8 100644
--- a/projects/planner/src/app/shared/settings-normalization.service.spec.ts
+++ b/projects/planner/src/app/shared/settings-normalization.service.spec.ts
@@ -10,6 +10,7 @@ import { DiverOptions } from './models';
 import { DiveSchedules } from './dive.schedules';
 import { ViewStates } from './viewStates';
 import { ReloadDispatcher } from './reloadDispatcher';
+import { ApplicationSettingsService } from './ApplicationSettings';
 
 describe('SettingsNormalizationService', () => {
     let service: SettingsNormalizationService;
@@ -30,7 +31,8 @@ describe('SettingsNormalizationService', () => {
             providers: [
                 RouterTestingModule, UnitConversion,
                 SettingsNormalizationService, ReloadDispatcher,
-                ViewStates, DiveSchedules
+                ViewStates, DiveSchedules,
+                ApplicationSettingsService
             ],
             imports: [RouterTestingModule.withRoutes([])]
         });
diff --git a/projects/planner/src/app/shared/settings-normalization.service.ts b/projects/planner/src/app/shared/settings-normalization.service.ts
index 51d309a6..6a625c21 100644
--- a/projects/planner/src/app/shared/settings-normalization.service.ts
+++ b/projects/planner/src/app/shared/settings-normalization.service.ts
@@ -3,14 +3,15 @@ import { Precision } from 'scuba-physics';
 import { OptionsService } from './options.service';
 import { TanksService } from './tanks.service';
 import { RangeConstants, UnitConversion } from './UnitConversion';
-import { ViewStates } from './viewStates';
 import { DepthsService } from './depths.service';
 import { DiveSchedule, DiveSchedules } from './dive.schedules';
+import { ApplicationSettingsService } from './ApplicationSettings';
 
 @Injectable()
 export class SettingsNormalizationService {
     constructor(
         private units: UnitConversion,
+        private appSettings: ApplicationSettingsService,
         private schedules: DiveSchedules
     ) { }
 
@@ -28,6 +29,16 @@ export class SettingsNormalizationService {
         this.normalizeSegments(dive.depths);
     }
 
+    private applyToAppSettings(): void {
+        const settings = this.appSettings.settings;
+        const densityRounding = this.units.ranges.densityRounding;
+
+        settings.maxGasDensity = this.fitUnit(
+            v => this.units.fromGramPerLiter(v),
+            v => this.units.toGramPerLiter(v),
+            settings.maxGasDensity, this.units.ranges.maxDensity, densityRounding);
+    }
+
     private applyToOptions(options: OptionsService): void {
         const oDiver = options.diverOptions;
         const rmvRounding = this.units.ranges.rmvRounding;