Online Stopwatch
Free online stopwatch with lap times and millisecond precision — no downloads, no sign-up. Just click Start.
Free online stopwatch: Click Start to begin timing with millisecond precision. Use the Lap button to record split times. Works in any browser — no downloads needed. Perfect for workouts, cooking, studying, and sports timing.
About This Stopwatch
Free online stopwatch with millisecond precision and lap timing. Perfect for workouts, cooking, studying, and any activity that needs precise timing. No downloads or sign-up required — just click Start.
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Frequently asked questions
How accurate is this online stopwatch?
Our stopwatch uses high-resolution browser timing for millisecond precision. It continues running accurately even if you switch browser tabs, so you can time activities without keeping the page visible.
Can I record lap times?
Yes. Click the Lap button while the stopwatch is running to record split times. Each lap shows the total elapsed time and the interval since the previous lap. Perfect for tracking workout intervals, race splits, or timed activities.
What can I use an online stopwatch for?
Common uses include timing workouts and HIIT intervals, cooking and baking, studying with timed sessions, sports and race timing, science experiments, and any task where you need to measure elapsed time precisely.