Stopwatch & Timer
Use the stopwatch to measure elapsed time, or set a countdown timer. Perfect for workouts, cooking, studying, and productivity.
How to Use This Tool
- Stopwatch: Click Start to begin timing. Click Lap to record split times without stopping the clock.
- Countdown: Set hours, minutes, and seconds using the input fields or the quick-set buttons. Click Start to begin counting down.
- Use the Pomodoro button (25 min) for the popular time-management technique of focused work intervals.
- Click Reset at any time to return the timer to its initial state.
Stopwatch vs. Timer
A stopwatch counts upward from zero, measuring how much time has elapsed since you started it. A countdown timer counts downward from a preset duration and alerts you when time is up.
The Pomodoro Technique is a time-management method that uses a 25-minute focused work session followed by a 5-minute break. After four cycles, take a longer 15–30 minute break. This tool includes a one-click 25-minute preset to get you started.
Examples
Use the stopwatch to time a set, then hit Lap to record each round. Compare split times across rounds.
Set a 10-minute countdown for boiling pasta while you prep sauce on the side.
Use the 25-minute Pomodoro preset to focus on reading, then take a 5-minute break before the next session.
Frequently Asked Questions
What's the difference between a stopwatch and a timer?
A stopwatch measures elapsed time by counting up from zero, while a timer counts down from a preset duration. Use a stopwatch to see how long something takes, and a timer to limit how long you spend on a task.
How does the Pomodoro technique work?
Work in a focused 25-minute block, then take a 5-minute break. After four cycles, take a longer 15–30 minute break. This tool provides a one-click 25-minute preset so you can start immediately.
Can I use this for workout intervals?
Yes. Start the stopwatch at the beginning of each set and click Lap at the end to record your split time. Review your lap list to track performance across rounds.
Does the stopwatch work when the tab is in the background?
Most browsers throttle setInterval in background tabs. For best accuracy, keep the tab in the foreground. The time is calculated from the wall-clock difference, so the total elapsed time will still be correct even if display updates are delayed.