Stopwatch
Free online stopwatch with millisecond precision, lap timing, and split times. 100% client-side, no signup required.
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What is Stopwatch?
An online stopwatch measures elapsed time with precision. It features start, pause, and reset controls with lap time recording for tracking split times during activities like sports, cooking, or timed exercises.
Key Benefits
- Millisecond precision
- Lap time recording
- Works offline
- No installation needed
Common Use Cases
- •Sports timing
- •Cooking
- •Exercise intervals
- •Productivity tracking
How to Use the Stopwatch
- Click Start: Press the Start button to begin timing.
- Record lap times: Click Lap to record split times without stopping.
- Pause or reset: Use Pause to stop temporarily, Reset to clear.
- Copy results: Copy all recorded times to clipboard or download.
Key Features
- Millisecond precision with real-time updates every 10ms
- Record unlimited laps with automatic best/worst lap detection
- Split time display for each recorded lap
- Keyboard shortcuts for hands-free operation (Space, L, R)
- Works offline - no internet connection required after loading
- Completely free with no ads, no signup, and no tracking
Frequently Asked Questions
How accurate is the online stopwatch?
The stopwatch uses JavaScript timing with millisecond precision. For most practical purposes, it provides accurate timing for sports, cooking, and general tasks.
Can I record lap times?
Yes, click the Lap button to record split times without stopping the stopwatch. All lap times are displayed in a list for review.
Does the stopwatch work if I switch tabs?
Yes, the stopwatch continues running in the background. Modern browsers may throttle inactive tabs, but timing remains accurate.
Can I save or export my recorded times?
Yes, you can copy all lap times to clipboard or download them as a text file for later reference.