diff --git a/frontend/src/component/impact-metrics/metricsFormatters.test.ts b/frontend/src/component/impact-metrics/metricsFormatters.test.ts
index be1f04f548..948f724e01 100644
--- a/frontend/src/component/impact-metrics/metricsFormatters.test.ts
+++ b/frontend/src/component/impact-metrics/metricsFormatters.test.ts
@@ -7,14 +7,14 @@ describe('formatLargeNumbers', () => {
     });
 
     it('formats thousands correctly', () => {
-        expect(formatLargeNumbers(1000)).toBe('1k');
-        expect(formatLargeNumbers(1200)).toBe('1.2k');
-        expect(formatLargeNumbers(1400)).toBe('1.4k');
-        expect(formatLargeNumbers(1600)).toBe('1.6k');
-        expect(formatLargeNumbers(5000)).toBe('5k');
-        expect(formatLargeNumbers(9500)).toBe('9.5k');
-        expect(formatLargeNumbers(10000)).toBe('10k');
-        expect(formatLargeNumbers(999000)).toBe('999k');
+        expect(formatLargeNumbers(1000)).toBe('1K');
+        expect(formatLargeNumbers(1200)).toBe('1.2K');
+        expect(formatLargeNumbers(1400)).toBe('1.4K');
+        expect(formatLargeNumbers(1600)).toBe('1.6K');
+        expect(formatLargeNumbers(5000)).toBe('5K');
+        expect(formatLargeNumbers(9500)).toBe('9.5K');
+        expect(formatLargeNumbers(10000)).toBe('10K');
+        expect(formatLargeNumbers(999000)).toBe('999K');
     });
 
     it('formats millions correctly', () => {
diff --git a/frontend/src/component/impact-metrics/metricsFormatters.ts b/frontend/src/component/impact-metrics/metricsFormatters.ts
index 3cf88b3a09..69c3d1e12f 100644
--- a/frontend/src/component/impact-metrics/metricsFormatters.ts
+++ b/frontend/src/component/impact-metrics/metricsFormatters.ts
@@ -53,11 +53,7 @@ export const getSeriesLabel = (metric: Record<string, string>): string => {
     return `${__name__} (${labelParts})`;
 };
 
-export const formatLargeNumbers = (value: number): string => {
-    const formatter = prettifyLargeNumber(1000, 1);
-    const result = formatter(value);
-    return result.replace(/K/g, 'k');
-};
+export const formatLargeNumbers = prettifyLargeNumber(1000, 1);
 
 export const getMetricType = (seriesName: string) => {
     if (seriesName.startsWith('unleash_counter_')) return 'counter';