This online stopwatch measures time to the hundredth of a second and records as many laps as you need. Each lap shows its own time and the running total, and once you have three or more laps the fastest is marked green and the slowest red.
Use it for workouts and running intervals, cooking, presentations, games, experiments or timing tasks at work. It keeps running even if you close and reopen the page, can go full screen for a room to see, and asks your device to keep the screen on while it runs, where supported.
How to use the Online Stopwatch tool
- Press Start (or the Space bar) to begin timing.
- Press Lap (or L) to record a split while the stopwatch keeps running.
- Press Stop to pause, then Resume to continue.
- Press Reset (or R) to clear the time and laps.
- Use Copy laps to paste your splits into a spreadsheet.
Why use ToolOrca Online Stopwatch
- Hundredths of a second
- Unlimited laps with fastest and slowest marked
- Keyboard shortcuts: Space, L and R
- Full screen mode
- Keeps running after a page reload
- Copy laps to a spreadsheet
How accurate is an online stopwatch?
The stopwatch stores the moment you pressed Start and calculates the elapsed time from your device clock, so it stays accurate even if the browser tab is in the background or your phone screen turns off. The display refreshes many times a second.
The main source of error is human reaction time, which is usually about 0.2 seconds when pressing a button. For races that need official times, use dedicated timing equipment.
Frequently asked questions
Does the stopwatch keep running if I close the tab?
Yes. The start time is saved in your browser, so when you open the page again the stopwatch shows the correct elapsed time and your laps.
What is the difference between lap time and total time?
Lap time is the time since the previous lap. Total time is the time since you started. Both are shown for every lap.
Can I use it full screen?
Yes. Press the ⛶ button to show the stopwatch full screen, which is useful on a projector or TV. Press Esc to leave full screen.
Do I need a countdown instead?
Use the countdown timer to count down from a set time with an alarm, or the pomodoro timer for focus sessions.