About Online Stopwatch
Whether you are timing sprints on a track, measuring your coding velocity, or perfecting your coffee brew, precision matters. Our Online Stopwatch offers millisecond-accuracy directly in your browser. With unlimited 'Lap' functionality, you can track multiple intervals without stopping the main timer, making it perfect for sports ranking or multi-stage task tracking.
Master Online Stopwatch
Read our comprehensive 1000+ word guide on how to use Online Stopwatch effectively.
1How to Use
Step 1
Click 'Start' (or press Spacebar) to begin timing.
Step 2
Click 'Lap' to record a split time while the timer continues running.
Step 3
Click 'Stop' to pause the timer.
Step 4
Review your list of lap times below the main display.
Step 5
Click 'Reset' to clear everything and start fresh.
Why Use This Tool?
Application 1
Sports & Fitness: Track lap times for running, swimming, or circuit training.
Application 2
Productivity: Measure exactly how long tasks take to improve your time management (Time Tracking).
Application 3
Cooking: Time the perfect steep for tea or boil for eggs.
Application 4
Education: Conduct science experiments where reaction time or duration measurements are key.
Frequently Asked Questions
Is it accurate?
Yes, it uses the High Resolution Time API (performance.now) relative to your system clock, ensuring precision to the millisecond.
Does it work if I switch tabs?
Yes, modern browsers allow the timer logic to verify the start time against the current time, so even if the visual update slows down in the background, the time calculation remains correct when you return.
Can I export my lap times?
Currently, you can view and copy them manually. We are working on a CSV export feature.