Online Stopwatch
Free online stopwatch with millisecond precision and lap timer
Lap Times
No laps recorded yet| Lap | Lap Time | Total Time |
|---|
Session Stats
Perfect For
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Use Tool →How to Use
Start the Stopwatch
Click Start or press the Space bar. The stopwatch begins counting immediately with millisecond precision.
Record Laps
Press Lap (or the L key) at any moment while running to capture a split time without stopping the clock.
Review Your Times
Stop with Space or Pause, then review lap times. The fastest and slowest laps are highlighted automatically, and press Reset to clear.
About This Tool
Free online stopwatch with millisecond precision and lap timer
This online stopwatch runs entirely in your browser with centisecond (1/100 second) precision, making it accurate enough for sports training, cooking, lab work, and games. Laps are recorded instantly without interrupting the timer.
No download or registration is required. Keyboard shortcuts (Space, L, R) let you operate the stopwatch hands-free, and lap statistics update live as you record splits.
Millisecond Precision
Built on the browser high-resolution timer, accurate to 1/100 of a second — the precision standard for track and swimming events.
Smart Lap Tracking
Every lap is numbered with split and total times. The fastest and slowest laps are automatically highlighted for instant analysis.
Keyboard Shortcuts
Control everything without leaving the keyboard: Space to start and pause, L to record laps, and R to reset.
Learn More
Sports & Racing — Time sprints, laps, and races, then compare split times to measure consistency and pacing.
Fitness Training — Track rest periods between sets and circuit stations with hands-free keyboard control.
Teaching & Labs — Use it as a classroom timer for experiments, quizzes, and timed activities on any shared screen.