diff --git a/src/hud/Resources.svelte b/src/hud/Resources.svelte
index e8bee8b..f475c55 100644
--- a/src/hud/Resources.svelte
+++ b/src/hud/Resources.svelte
@@ -31,6 +31,7 @@
     <div>
         <img src="/img/icons/culture.png" alt="Culture" />
         { Math.floor($village.resources.culture) }
+        ({ production.culture >= 0 ? '+' : '' }{ production.culture })
     </div>
 </div>
 
diff --git a/src/update.ts b/src/update.ts
index 8f0ba6a..2b975ac 100644
--- a/src/update.ts
+++ b/src/update.ts
@@ -76,12 +76,6 @@ export default function update(timestamp: number) {
                 }
             });
 
-            // Make philosophers produce culture.
-            const philosopher = getUnitSource('philosopher');
-            const outputPerMinute = philosopher.behavior.culturePerMinute;
-            const outputPerMilisecond = outputPerMinute /  60.0 / 1000.0;
-            V.resources.culture += outputPerMilisecond * delta * (V.units.philosopher || 0);
-
             // Check if the game is won.
             if (V.resources.culture >= 2000) {
                 V.victory = true;
diff --git a/src/utils.ts b/src/utils.ts
index 2603802..af511d0 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,29 +1,31 @@
 import units from "./data/units";
-import type { BuildingType, CostType, ProductionType } from "./types";
+import type { BuildingType, CostType, ProductionType, ResourcesType } from "./types";
 import type { VillageState } from "./village";
 
 
-function _reduceResources(acc: ProductionType, item: ProductionType): ProductionType {
+function _reduceResources(acc: ResourcesType, item: ResourcesType): ResourcesType {
     return {
         wood: acc.wood + item.wood,
         stone: acc.stone + item.stone,
         iron: acc.iron + item.iron,
         food: acc.food + item.food,
+        culture: acc.culture + item.culture,
     };
 }
 
 
-export function getEmptyResources(): ProductionType {
+export function getEmptyResources(): ResourcesType {
     return {
         wood: 0,
         stone: 0,
         iron: 0,
         food: 0,
+        culture: 0,
     };
 }
 
 
-export function getProduction(villageState: VillageState): ProductionType {
+export function getProduction(villageState: VillageState): ResourcesType {
     let production = getEmptyResources();
 
     // Add buildings production and intake.
@@ -36,12 +38,20 @@ export function getProduction(villageState: VillageState): ProductionType {
         })
         .reduce(_reduceResources, production);
 
-    // Add units intake.
+    // Add units production and intake.
     ['philosopher'].forEach(type => {
         const unit = getUnitSource(type);
         const unitCount = villageState.units[type] || 0;
+
+        // Add food intake.
         const intakePerMinute = unit.behavior.foodIntakePerMinute * unitCount;
         production.food -= intakePerMinute;
+
+        // Add culture production for Philosophers.
+        if (type === 'philosopher') {
+            const outputPerMinute = unit.behavior.culturePerMinute;
+            production.culture += outputPerMinute * unitCount;
+        }
     });
 
     return production;