Stopwatch
Digital stopwatch with lap times. Measure elapsed time for workouts, races, and tasks. Free online stopwatch. Start, lap, stop, and reset.
Stopwatch
What is this?
A stopwatch measures elapsed time from start. Lap times record the time at that moment without stopping. Useful for timing multiple segments (race laps, workout intervals) in sequence. Click Start to begin. Click Lap to record the current elapsed time without stopping the timer. Click Stop to pause. Start again to resume, or Reset to clear. Lap times let you track multiple segments: each mile of a run, each interval of a workout, each lap of a race. The stopwatch uses JavaScript timers—accuracy is typically within 10–50 ms. For precise scientific timing, use dedicated hardware. For most uses, it is accurate enough.
When to use
Use for workouts (lap each mile), races (split times), or any task where you need elapsed time. Example: Start, lap at 1 mile, lap at 2 miles. See each segment time. Runners track mile splits. Swimmers time laps. Coaches time intervals. Anyone measuring duration. Track multiple segments without stopping. Compare lap times. Essential for training. No app needed. Simple interface. Start, lap, stop, reset. Free and always available. Perfect for fitness and sports.
How to use
Click Start to begin. Use Lap to record the current time without stopping. Click Stop to pause, then Start to resume. Reset clears the time and all laps.
Frequently asked questions
- Click Start to begin timing. Click Lap to record the current elapsed time without stopping. Click Stop to pause. Click Start again to resume, or Reset to clear everything.
- A lap time records the elapsed time at that moment. Useful for timing multiple segments (e.g., laps in a race or intervals in a workout) without stopping the stopwatch.
- The stopwatch uses JavaScript timers (setInterval). Accuracy depends on the browser and device; typically within 10–50 ms. For precise timing, use a dedicated device.