An online stopwatch measures how long something takes from the moment you press Start. That makes it different from a countdown timer: you do not need to know the duration in advance. GeoTimeTools’s free online stopwatch shows hours, minutes, seconds, and milliseconds in a readable display, so it works for a running interval, a study sprint, a speech rehearsal, a lab observation, or a quick “how long did that take?” check.
Use Split to record a lap without stopping the main stopwatch. The split list keeps both the total elapsed time and the time since the previous split, which makes it useful for laps, sets, repeated drills, process checks, and comparing sections of a task. Pause preserves the elapsed value, while Reset clears the session so you can begin again with a clean record.
The stopwatch also supports keyboard shortcuts for focused use: Space starts or pauses, L records a lap, and R resets the clock. Copy creates a tab-separated result you can paste into a note or spreadsheet, while Export downloads the recorded splits as a plain text file. Everything happens in the browser, so the tool is quick to open and convenient on a laptop, tablet, or phone.
Split time versus lap time
A split is the total time shown when you mark an event. A lap is the interval since the previous mark. Seeing both values helps you compare each segment without losing the complete elapsed time.
For training and focused work
Use one split for each lap, reading, set, experiment stage, or presentation section. The best-lap summary provides a quick comparison, while the full list keeps the detailed record available for copying or export.