Online Stopwatch
A precise, free stopwatch with lap tracking — right in your browser.
0:00.00
Keyboard: Space to start/stop, L to lap
Clock change guides
- What Is Daylight Saving Time (DST)? A Plain-English GuideWhat daylight saving time is, how it works in the UK, Europe and the US, why it exists, its history, who uses it and the argument over scrapping it.
- Why Do the Clocks Go Back in October? The Real ReasonThe clocks go back in autumn to return the UK to GMT, so winter mornings are lighter. The history, the rule, what time it happens and what changes for you.
- When Do the Clocks Go Forward Again After Going Back?When the UK clocks go forward again after the autumn change, how long the UK stays on GMT, when evenings get lighter and how to remember to reset your clocks.
Frequently asked questions
How accurate is this stopwatch?
It uses your browser's high-resolution performance clock, which is accurate to well under a second — precise enough for practice timing, workouts, and casual sports use.
Can I record lap times?
Yes, tap Lap while the stopwatch is running to record a split; laps are listed with the most recent one on top.