Stopwatch with laps
00:00:00.000
Press Lap while the stopwatch runs to capture each split without stopping. Every lap stores its own duration and the running total, and the fastest and slowest laps are highlighted once you have more than one.
How to record laps
Start timing
Press Start. The display counts up from zero.
Record a lap
Press Lap or the L key at each marker. Splits appear instantly below.
Review and clear
Compare lap and total columns, then Reset or Clear laps to start over.
Lap features
Unlimited splits
Record as many laps as you need, while running or paused.
Fastest and slowest
Automatic highlighting once you have two or more laps.
Millisecond precision
Every split measured from timestamps, never a drifting counter.
Related tools
- StopwatchStart timing in one click — milliseconds, laps and fullscreen, with nothing to install and no account to create.
- Online stopwatchA free online stopwatch with laps, milliseconds and fullscreen — press Start and time anything in one click.
- Full screen stopwatchOne click hides everything else and shows a giant stopwatch readable from across the room.
- Classroom stopwatchTime activities, experiments and exam practice on a projector or interactive whiteboard, with laps and a countdown timer built in.
Stopwatch with laps questions
What is a stopwatch?
A stopwatch is a tool that measures elapsed time. It counts up from zero in hours, minutes, seconds and milliseconds, and you can pause, resume, reset and record lap splits.
What is a stopwatch used for?
People use a stopwatch for sports training, running splits, workouts, exams, experiments, cooking, games and any task where you need to know exactly how long something took.
How does a stopwatch work?
This online stopwatch measures time from your device clock using timestamps. When you press Start it stores the start moment; the display is computed from the difference, so it stays accurate even if the tab is in the background.
How do I use a stopwatch?
Press Start to begin timing, Pause to freeze the reading, Lap to record a split without stopping, and Reset to return to zero. You can also use the space bar, L, R and F keys.
How do I start a stopwatch?
Press the Start button on this page. The display begins at 00:00:00.000 and counts up immediately — no sign-up, no download, no settings to configure first.
How do I read a stopwatch?
Read the display left to right as hours, minutes, seconds and milliseconds (HH:MM:SS.mmm). Laps below show each split time next to the running total at that moment.
How do I set a stopwatch?
A stopwatch needs no setting — it always starts from zero. Just open this page and press Start. If you need to count down a fixed duration instead, use the online timer.
How accurate is an online stopwatch?
This stopwatch derives elapsed time from high-resolution timestamps rather than an incrementing counter, so it stays accurate during background tabs, screen locking and long sessions. It is suitable for training, study and everyday timing.
Can I use a stopwatch on my phone?
Yes. This stopwatch works on iPhone, Android and tablets directly in the browser. The controls are touch-friendly and the display scales down to small screens.
Can I use an online stopwatch without downloading an app?
Yes — this stopwatch runs entirely in your browser with nothing to install. After your first visit it is cached and keeps working offline too.