Skip to content
Work data is processed in your browser, not stored on our servers.
tools
Online Stopwatch with Lap Times

Online Stopwatch with Lap Times

Measure elapsed time to hundredths of a second and record split and cumulative lap times.

Focus mode
Stopwatch
Calculates elapsed time from the recorded start timestamp.
00:00.00

Ready

SpaceStart / stopLLapRReset
Lap records
Record a lap to see split and cumulative times.
No laps recorded.

Key features

  • Displays elapsed time to hundredths of a second.
  • Records both split and cumulative times for each lap.
  • Highlights the fastest and slowest splits when at least two laps exist.
  • Supports Space, L, and R keyboard controls for timing actions.

How to use

  1. Press Start or the Space key to begin timing.
  2. Use the Lap button or L key to record a split.
  3. Stop the timer or press R to clear all records.

Examples

  • Record practice intervals

    Add laps to capture each split alongside cumulative time from the start.

  • Compare repeated task speed

    Use highlighted fastest and slowest splits across two or more laps to inspect variation.

Privacy

Elapsed time and lap records remain in the current page's browser memory and are not sent to a server.

Common questions

Does a hundredth-second display mean laboratory accuracy?
No. The display has hundredth-second resolution, but browser scheduling and device conditions prevent a guarantee of professional timing accuracy.
Do lap records remain for my next visit?
No. Elapsed time and laps exist only in the current page memory and disappear after Reset or a reload.

Related tools