Stopwatch
A free online stopwatch with millisecond precision. Start, stop, reset and record laps — perfect for workouts, cooking, studying and timing anything. No signup, runs in your browser.
Elapsed time
Timing is measured from your device clock, so it stays accurate even if the display updates slowly. Laps are listed below.
Laps
- No laps yet — press Lap while the stopwatch is running.
How to use
- Click Start to begin timing.
- Click Lap any time to record a split without stopping the clock.
- Click Stop to pause, or Reset to clear the time and laps.
Frequently asked questions
How accurate is this stopwatch?
It measures elapsed time from your device clock and displays milliseconds. It is accurate enough for workouts, cooking and study sessions, but it is not a certified timing device for official races.
Does the stopwatch keep running if I switch tabs?
Yes — the elapsed time is calculated from the start timestamp, so it keeps counting even if the tab is in the background. Very long background tabs may pause display updates, but the final time stays correct.
What is a lap?
A lap records the time shown when you press Lap, without stopping the clock. Use laps to time each round of a run, each set of an exercise, or each step of a recipe.
Is any timing data saved or sent anywhere?
No. The stopwatch runs entirely in your browser and nothing is uploaded or stored. Use it as a free stopwatch online — no signup, nothing to install.
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