Precise time tracking with lap functionality
A stopwatch is a precision timing device that counts upward from zero to measure elapsed time. Unlike a clock that displays the current time, a stopwatch tracks the duration between when you press start and when you press stop. Our online stopwatch provides millisecond precision (1/1000th of a second), making it perfect for accurate time measurement in any situation.
The stopwatch works by capturing the exact moment you click "Start" and continuously calculating the difference between that moment and now. This millisecond stopwatch runs entirely in your browser with no server delays, ensuring the most accurate timing possible.
Bottom line: Use a stopwatch when asking "How long did this take?" Use a timer when saying "I have X minutes to complete this."
The lap timer functionality allows you to record split times without stopping the main stopwatch. Each time you click "Lap," the current elapsed time is saved while the stopwatch continues running. This is essential for:
Use this workout timer for High-Intensity Interval Training (HIIT), tracking rest periods between sets, or measuring your running pace. The lap function helps you monitor each interval separately.
Track cooking times precisely—from boiling eggs to baking bread. The millisecond precision ensures your recipes turn out perfectly every time.
Measure how long you can focus, track study durations, or time practice tests. Understanding your actual study time helps optimize your learning schedule.
This precision timer is ideal for timing races, games, or any competitive event. The stopwatch with laps feature lets you record multiple participants or track quarter/half times.
Developed by Francesco Cirillo, this method uses timed work sessions to maximize focus:
Use the stopwatch to discover where your time actually goes. Track tasks like email (often 1h 45m—more than expected), coding, meetings, and identify time sinks. Freelancers can use it for accurate billing and invoicing.
Research shows the most productive people work for 52 minutes, then break for 17 minutes. Use the stopwatch to track these focused bursts followed by recovery periods.
This stopwatch provides millisecond precision (1/1000th of a second). It runs entirely in your browser using JavaScript's high-resolution timing, making it suitable for most timing needs including workouts, cooking, and productivity tracking.
Yes! Once loaded, this stopwatch works entirely in your browser with no internet connection required. It's a completely client-side tool with no server dependencies.
Lap time shows the total elapsed time when you pressed the Lap button. Split time typically refers to the time between laps. This stopwatch displays lap times, so you can calculate splits by subtracting consecutive lap times.
Absolutely! Use the lap function to record each interval. For example, during a 40-second sprint / 20-second rest routine, record a lap at the end of each work interval to track your performance.
No. This is a privacy-first tool. All timing happens locally in your browser. No data is sent to any server, and nothing is stored after you close the page.