Count up with lap times, split tracking, and fullscreen display.
Free Online Stopwatch
A simple, accurate online stopwatch with lap and split time tracking. Press Start to begin counting, Lap to record a split, and Stop to pause. Lap times are color-coded to highlight your fastest and slowest splits.
How to Use the Stopwatch
Press Start to begin the stopwatch. Press Lap while it's running to record a split time without stopping. Press Stop to pause, and Resume to continue from where you left off. Press Reset to clear all times. Use the Export CSV button to download your lap data.
What Is a Lap Time?
A lap time records the elapsed time for each individual interval while the total time continues running. This is useful for measuring how long each repetition, circuit, or activity takes independently. The fastest lap is highlighted in green, the slowest in red.
Frequently Asked Questions
How do I record lap times?
Press the Lap button while the stopwatch is running to record a split. The stopwatch continues counting — it only records the split without stopping. Your fastest lap is shown in green, slowest in red.
How accurate is this stopwatch?
The stopwatch uses JavaScript's Date.now() with 50ms update intervals for the display, giving accuracy to within a fraction of a second. It's accurate enough for sports, cooking, and most everyday timing needs.
Can I export my lap times?
Yes. Press the Export CSV button to download a spreadsheet of all your lap and total times.