Lap timer · Colour-coded fastest & slowest splits
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This online stopwatch measures elapsed time down to hundredths of a second, right in your browser, with start, stop, lap, and reset controls. It is ideal for timing workouts, cooking, study sessions, presentations, science experiments, or any activity where you need an accurate, no-install timer that is ready the moment the page loads.
Press start and the stopwatch begins counting up from zero, recording hours, minutes, seconds, and hundredths. Rather than simply adding fixed intervals, it compares the current time against the moment you pressed start, so the reading stays accurate even if your device is briefly busy or the browser tab is throttled in the background. Pressing stop pauses the count, and start resumes from exactly where you left off.
The lap button captures a split time without stopping the clock, letting you record multiple intervals — such as each mile of a run or each set in the gym — while the overall timer keeps going. Reset clears everything back to zero for a fresh measurement. Because everything runs locally in your browser, there is no lag from a network connection and the tool keeps working even if you go offline.
A stopwatch counts up from zero, which is the opposite of a countdown timer that counts down to zero from a set duration. Use the stopwatch when you want to measure how long something actually takes — a workout, a phone call, a cooking step, or a lab experiment — rather than being alerted when a fixed period has elapsed. Displaying hundredths of a second also makes it precise enough for casual sports timing and interval training.
Yes — completely free, no sign-up needed.
Yes — once loaded, it works without an internet connection.
Yes — works on any device.
Yes — audio alerts are supported in modern browsers. Make sure your volume is on.