Productivity
Stopwatch Timer
Precise stopwatch with lap times and interval tracking functionality.
When a stopwatch is still the right UI
You use a stopwatch for repeatable timing like fitness intervals, public speaking run-throughs, or simple benchmark loops when you are not in a full profiling environment. A lap feature helps you compare segments, not just total time.
Use the tool
How to avoid misleading measurements
Browser timers are affected by throttling, background tabs, and device load. If you are measuring sub-second work precisely, a lab setup with proper tools is more reliable. If you are measuring human performance, the bigger variable is still technique, not millisecond clock precision.
A simple tool
This is an everyday utility. It is not a certified chronometer and not intended for safety-critical events.