Stopwatch — A no-frills online stopwatch: start, stop, reset, and capture laps. Times are accurate to the millisecond and displayed in a large, easy-to-read format. Laps are recorded with both the lap time and the cumulative time so you can see splits.
All timing happens in your browser. No data is uploaded.
Was Stopwatch useful?
Stopwatch是什么？
A no-frills online stopwatch: start, stop, reset, and capture laps. Times are accurate to the millisecond and displayed in a large, easy-to-read format. Laps are recorded with both the lap time and the cumulative time so you can see splits.
Useful for timing sprints, workouts, study sessions, cooking, or anything else that benefits from a clear, accurate timer that does not need a separate app.
使用方法
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Start
Press Start (or Space) to begin timing.
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Lap or pause
Press Lap to record a split. Press Pause (or Space) to stop.
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Reset
When paused, press Reset to clear.
示例
Sprint interval
Start the timer, run for 30 seconds, hit Lap, repeat.
结果： Lap 1: 00:30.12 · Lap 2: 01:00.34 · …
常见问题
相关指南
How to Create a Stopwatch or Countdown Timer (Free, In Your Browser)
Stopwatches, countdown timers, and interval clocks are daily tools for cooking, fitness, studying, and meetings. This guide covers when to use which, the right tool, and how to build one yourself in JavaScript.
How to Build a Pomodoro Schedule That Actually Works
The 25-minute pomodoro is a starting point, not a rule. Some people focus better in 50-minute blocks, some in 90. Some need 5-minute breaks, some need 15. Here is how to build a pomodoro schedule that fits your work, your energy, and your task type, and how to track what is working.
What Is a Pomodoro Timer (and Why It Actually Works)
The Pomodoro Technique is a 25-minute focus timer with 5-minute breaks, invented in the late 1980s. It works because of how attention and fatigue actually behave, not because of the timer. Learn the original rules, the science, the variations, and how to run a Pomodoro session in your browser.
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Last reviewed: 2026-09-25