Stopwatch

Free online stopwatch tool with millisecond precision, support multiple lap records.

Features

• High precision timing to milliseconds
• Support start, pause, reset operations
• Multiple lap record function
• Real-time display of split time and total time
• Lap records sorted in reverse chronological order
• Responsive design, support mobile devices
• Dark/light theme switching
• Internationalization support (Chinese/English)

Usage Instructions

1. Click "Start" button to start the stopwatch
2. Click "Lap" button to record split time
3. Click "Pause" button to stop timing
4. Click "Reset" button to clear all records
5. Can pause and resume at any time during timing

Lap Function Description

• Lap：Click lap button to record current time point
• Split Time：Time difference between two adjacent laps
• Total Time：Total time from start to current lap
• Support unlimited lap records

Application Scenarios

• Running sports timing
• Swimming training timing
• Cycling training timing
• Competition speed timing
• Scientific experiment timing
• Game speedrun timing
• Work efficiency timing

Notes

• All records will be lost after page refresh
• It is recommended to keep the browser tab active for best timing accuracy
• Long time timing may have minor errors