Our online calculator will help you make the countdown time in seconds and milliseconds "stopwatch online".
Stopwatch is a precise instrument that can measure time intervals with precision to fractions of a second.
A millisecond is a unit of time equal to one thousandth fraction of a second (1/1000 s).
Commonly used stopwatches with an accuracy of 1/10, 1/100, 1/1000 of a second.
This stopwatch is able to keep accurate time counting in the background.