Stopwatch & Timer
Precise stopwatch with lap recording
Online Stopwatch and Countdown Timer
This free tool combines two everyday utilities in one place: a precise stopwatch that counts up from zero and a countdown timer that runs down to a moment you set. The stopwatch records lap times, so you can mark each segment of a run, a workout interval, or a study session without resetting the main clock. Everything runs in your browser, with no installation and no account needed.
A stopwatch is most useful when you want to measure how long something actually takes, while a timer is better when you want to be alerted after a fixed period. Students often use the timer for focused study blocks and short breaks, athletes use the stopwatch and lap feature for sprints and circuits, and content creators time segments to keep recordings tight.
Tips for Accurate Timing
For the cleanest results, keep the tab open and active, since some browsers slow background timers to save power. Use the lap button to capture splits instead of stopping and restarting, which preserves your total elapsed time. The display is mobile-friendly, so you can prop your phone on a desk and read the numbers from a short distance during a workout or experiment.