Stopwatch
Accurate online stopwatch with lap/split time tracking. Perfect for sports timing, running, workouts, cooking, studying, or any activity where you need to measure elapsed time precisely.
Our stopwatch is accurate to milliseconds and includes lap timer functionality. Track multiple lap times, view split times, and export your results. Great for track and field, swimming, cycling, racing, or interval training.
No download required - works in your browser on desktop, tablet, and mobile. Save your lap times, share results with others, or export to spreadsheet for analysis.
How to Use the Stopwatch
- Click Start to begin timing
- Click Lap to record lap/split times while continuing to run
- View your lap times in the list below the stopwatch
- Click Stop to pause timing (can resume with Start)
- Click Reset to clear and start over
- Use Share to send your lap times to others
When to Use a Stopwatch
- Running & Track: Time your runs, track your mile pace, or measure sprint times. Record lap times for each mile or kilometer.
- Swimming: Time your laps in the pool, measure your 50m or 100m times, track improvement over sessions.
- Cycling: Track ride duration, measure interval times, or time your hill climbs and sprints.
- Sports Training: Time drills, measure agility exercises, track rest periods between sets.
- Cooking & Recipes: Time multiple cooking steps, track how long different stages take for recipe refinement.
- Study & Productivity: Measure how long tasks take, track reading speed, or time practice tests.
Frequently Asked Questions
How accurate is the online stopwatch?
The stopwatch is accurate to milliseconds (0.001 seconds), which is precise enough for most timing needs including sports and scientific measurements.
What's the difference between lap time and split time?
Lap time is the duration of just that lap. Split time is the total elapsed time from start. Both are shown in our stopwatch.
Can I save my lap times?
Yes, you can share your results via URL or take a screenshot. Your times stay visible until you reset the stopwatch.
Is there a limit to how long the stopwatch can run?
No limit! The stopwatch can run for hours, days, or even longer if needed.