Online Stopwatch
A simple stopwatch with lap timing, right in your browser.
How to use the stopwatch
- Press Start to begin timing.
- Press Lap at any point to record a split without stopping the clock.
- Press Pause to stop the stopwatch, and Resume to continue.
- Press Reset to clear the time and lap list.
Track elapsed time with a clear, easy-to-read stopwatch. Start, pause, resume, and reset with one click, and log lap times to compare splits. Good for workouts, sports, cooking, or timing pretty much anything.
Using lap times and splits
A lap (or split) records the time at a specific moment without stopping the clock. Runners use laps to track each lap of a track, swimmers each length of the pool, and coaches each athlete in a relay. Comparing lap times shows whether your pace is steady, speeding up, or slowing down.
Outside sport, a stopwatch is handy for timing how long a task really takes, rehearsing a speech, measuring reaction times in a science experiment, or checking how long a recipe step lasts.
Frequently asked questions
How accurate is this online stopwatch?
The stopwatch updates every 10 milliseconds and is accurate for everyday timing needs like workouts, cooking, or games.
Can I record multiple lap times?
Yes, press Lap as many times as you want while it's running. Each lap and its split time gets listed in order.
What's the difference between a stopwatch and a timer?
A stopwatch counts up from zero to measure how long something takes. A timer counts down from a set time and alerts you when it reaches zero.
Does the stopwatch keep running in a background tab?
Yes. Elapsed time is calculated from the clock, so it stays accurate even if you switch tabs. Closing the tab resets it.