# Chronometer Guide

A simple stopwatch with laps.

- Tool: https://ilham.dev/tools/chronometer/
- Guide URL: https://ilham.dev/guides/chronometer/
- Tool guides index: https://ilham.dev/guides/tools/
- Broader guide: Dates, Timestamps, and Time Zones (https://ilham.dev/guides/dates-times-and-time-zones/)

## What it does

A stopwatch with lap times, counting in tenths of a second, for timing something without leaving the browser.

## Use the tool

Open https://ilham.dev/tools/chronometer/, add the input the tool asks for, run it, and check the output before using it elsewhere.

## Input and output

- Input: text.
- Output: text.
- Category: Math.

## Privacy and processing
Processing happens locally in your browser. This tool does not upload the input to ilham.dev.

## Questions

### Does it keep running if I switch tabs?

Yes. The elapsed time is computed from a clock reading rather than by counting ticks, so a backgrounded tab cannot make it drift.