StraightToolsOnline Stopwatch
Start, pause, and reset an accurate browser stopwatch.
Browser stopwatch
Elapsed time is calculated from the browser clock so brief rendering delays do not accumulate into the result.
When to use this tool
Use the stopwatch to measure elapsed time for everyday activities, practice sessions, exercises, or informal comparisons.
How the result is calculated
The stopwatch records a start timestamp and repeatedly calculates elapsed time from that reference. Pause preserves the elapsed value, and reset clears it.
Worked example
Start the stopwatch before an activity, pause when finished, and read the displayed minutes, seconds, and hundredths.
What to keep in mind
Browser scheduling and device sleep can affect display refresh. This is an everyday utility, not certified timing equipment for competition, scientific measurement, or safety systems.
About our calculations
StraightTools is designed to show the method behind the answer, not just the result. Inputs are handled in your browser for this tool. For important financial, legal, medical, tax, safety, or contractual decisions, verify the result with an appropriate authoritative source or qualified professional.