diff --git a/src/tools/chronometer/chronometer.service.test.ts b/src/tools/chronometer/chronometer.service.test.ts
new file mode 100644
index 00000000..5fdb3c72
--- /dev/null
+++ b/src/tools/chronometer/chronometer.service.test.ts
@@ -0,0 +1,12 @@
+import { describe, expect, it } from 'vitest';
+import { formatChronometerTime } from './chronometer.service';
+
+describe('chronometer', () => {
+  describe('formatChronometerTime', () => {
+    it('format the elapsed time', () => {
+      expect(formatChronometerTime({ elapsed: 123456 })).toEqual('02:03.456');
+      expect(formatChronometerTime({ elapsed: 123456, msPerUnit: 100 })).toEqual('03:25:45.600');
+      expect(formatChronometerTime({ elapsed: 12345600 })).toEqual('03:25:45.600');
+    });
+  });
+});
diff --git a/src/tools/chronometer/chronometer.service.ts b/src/tools/chronometer/chronometer.service.ts
new file mode 100644
index 00000000..a2e03b8a
--- /dev/null
+++ b/src/tools/chronometer/chronometer.service.ts
@@ -0,0 +1,13 @@
+export function formatChronometerTime({ elapsed, msPerUnit = 1 }: { elapsed: number; msPerUnit?: number }) {
+  const elapsedMs = elapsed * msPerUnit;
+
+  const ms = elapsedMs % 1000;
+  const secs = ((elapsedMs - ms) / 1000) % 60;
+  const mins = (((elapsedMs - ms) / 1000 - secs) / 60) % 60;
+  const hrs = (((elapsedMs - ms) / 1000 - secs) / 60 - mins) / 60;
+  const hrsString = hrs > 0 ? `${hrs.toString().padStart(2, '0')}:` : '';
+
+  return `${hrsString}${mins.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}.${ms
+    .toString()
+    .padStart(3, '0')}`;
+}
diff --git a/src/tools/chronometer/chronometer.vue b/src/tools/chronometer/chronometer.vue
new file mode 100644
index 00000000..2efcdc10
--- /dev/null
+++ b/src/tools/chronometer/chronometer.vue
@@ -0,0 +1,32 @@
+<template>
+  <div>
+    <n-card>
+      <div class="duration">{{ formatChronometerTime({ elapsed: counter, msPerUnit }) }}</div>
+    </n-card>
+    <br />
+    <n-space justify="center">
+      <n-button v-if="!isActive" secondary type="primary" @click="resume">Start</n-button>
+      <n-button v-else secondary type="warning" @click="pause">Stop</n-button>
+
+      <n-button secondary @click="counter = 0">Reset</n-button>
+    </n-space>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { useInterval } from '@vueuse/core';
+import { formatChronometerTime } from './chronometer.service';
+
+const msPerUnit = 10;
+
+const { counter, pause, resume, isActive } = useInterval(msPerUnit, { controls: true, immediate: false });
+</script>
+
+<style lang="less" scoped>
+.duration {
+  text-align: center;
+  font-size: 40px;
+  font-family: monospace;
+  margin: 20px 0;
+}
+</style>
diff --git a/src/tools/chronometer/index.ts b/src/tools/chronometer/index.ts
new file mode 100644
index 00000000..424d03dc
--- /dev/null
+++ b/src/tools/chronometer/index.ts
@@ -0,0 +1,11 @@
+import { TimerOutlined } from '@vicons/material';
+import { defineTool } from '../tool';
+
+export const tool = defineTool({
+  name: 'Chronometer',
+  path: '/chronometer',
+  description: 'Monitor the duration of a thing. Basically a chronometer with simple chronometer features.',
+  keywords: ['chronometer', 'time', 'lap', 'duration', 'measure', 'pause', 'resume', 'stopwatch'],
+  component: () => import('./chronometer.vue'),
+  icon: TimerOutlined,
+});
diff --git a/src/tools/index.ts b/src/tools/index.ts
index fe9e01f9..eeed10c9 100644
--- a/src/tools/index.ts
+++ b/src/tools/index.ts
@@ -5,6 +5,7 @@ import { tool as base64Converter } from './base64-converter';
 import { tool as bcrypt } from './bcrypt';
 import { tool as bip39 } from './bip39-generator';
 import { tool as caseConverter } from './case-converter';
+import { tool as chronometer } from './chronometer';
 import { tool as colorConverter } from './color-converter';
 import { tool as crontabGenerator } from './crontab-generator';
 import { tool as dateTimeConverter } from './date-time-converter';
@@ -59,6 +60,11 @@ export const toolsByCategory: ToolCategory[] = [
     icon: LockOpen,
     components: [mathEvaluator],
   },
+  {
+    name: 'Measurement',
+    icon: LockOpen,
+    components: [chronometer],
+  },
   {
     name: 'Text',
     icon: LockOpen,