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Free online stopwatch timer with no download required. Features one-click start/stop, lap tracking, and easy time copying.
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
A stopwatch starts at zero and accumulates elapsed time; a countdown starts from a duration you choose and decreases toward zero. This page offers both modes, so choose based on whether you are measuring how long something took or waiting for a planned endpoint.
The stopwatch display uses hours, minutes, seconds, and hundredths. For example, 00:01:23.45 means 1 minute, 23 seconds, and 45 hundredths as displayed. The countdown shows hours, minutes, and seconds. A hundredths display is a readable resolution, not a promise that a person can click or receive a visual or sound cue at that exact fraction.
While the stopwatch is running, each lap records both the interval since the previous lap and cumulative time since the start. If cumulative readings are 00:00:42.18 and 00:01:27.60, the second lap took 00:00:45.42. Newest rows appear first. This distinction helps compare segment pace without losing overall elapsed time.
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Open Stopwatch and select Start. Select Lap during the run to record a split. Pause freezes the reading; Start resumes from it. Reset clears the reading and lap rows.
Enter hours, minutes, and seconds. Minutes and seconds are ordinarily 0–59; the hour field is intended for values through 99. Quick choices include 1, 3, 5, 10, 15, and 30 minutes. Start begins; Pause and Start pause and resume.
At zero the timer displays a finished state and attempts a short tone. Reset clears the active countdown; edit the fields or choose a preset before starting another duration.
For example, use a 45-second countdown for practice and a 15-second countdown for rest. To compare running segments, use the stopwatch and mark each lap at a reference point.
Use cases
See how the tool fits into real work and everyday tasks.
Set a countdown for a study or speaking exercise. Treat the end tone as a prompt to check your work, not as a score.
Use countdown periods for work and rest, or record stopwatch laps to compare segments. For official race results, follow event timing rules.
Set a short countdown for tea or a task break, then return to check the result. A timer cannot determine whether food is finished.
Q&A
Find concise answers to common questions and confusing cases.
No. It resumes accumulated stopwatch time or remaining countdown. Use Reset to clear the session.
Lap time is the interval since the prior mark; total time is cumulative from the start. The first lap values are equal.
The page attempts a tone at zero, but browser audio settings, device mute, or background restrictions can prevent it. Use another reminder for important deadlines.
Notes
Review scope, result limitations, and important precautions before use.
This browser timer suits everyday timing and practice. Screen updates and alerts depend on the browser and device, particularly when a tab is backgrounded or a device sleeps. The hundredths shown do not certify a competition result, laboratory measurement, legal deadline, or safety-critical interval. Use the method and equipment required for those settings.
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