Stopwatch
InternetAiTools.com · Pro Precision
00:00
.000
Laps
0
Best
-
Avg
-
Lap TimesNo data
Frequently Asked Questions
How accurate is this stopwatch?
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This stopwatch uses JavaScript's requestAnimationFrame for smooth updates and displays time with millisecond precision (1/1000 of a second). The accuracy depends on your device's system clock, which is typically accurate to within a few milliseconds.
How do I record a lap time?
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While the stopwatch is running, click the LAP button. Each lap time is recorded and displayed in the list below, along with total elapsed time. You can record unlimited lap times during a single timing session.
What do the best and average lap statistics mean?
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Best Lap shows your fastest recorded lap time. Average Lap calculates the mean time of all recorded laps, helping you identify consistency in your performance across multiple intervals.
Can I use this stopwatch for professional timing?
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This stopwatch is suitable for sports training, fitness tracking, cooking, and general purpose timing. For official competitive events or scientific experiments requiring certified accuracy, please use professional calibrated equipment.
Does the stopwatch keep running if I close the browser?
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No, timing stops when you close the browser tab or refresh the page. This is a security feature of web browsers. For extended timing sessions, keep the tab open and active.
Our stopwatch is a high-precision timepiece designed to measure elapsed time with millisecond accuracy — an essential tool for athletes, researchers, and professionals tracking performance across sports, scientific experiments, cooking, and industrial tasks. Integrated lap functionality lets you record specific intervals without interrupting the primary timing sequence, with best-lap and average-lap stats calculated automatically. No registration, no ads, completely free and private — every calculation runs locally in your browser with millisecond precision, on a clean interface that works equally well for high-performance technical needs and routine daily timing.
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