or click Copy to copy the data to your clipboard. Can I record unlimited laps? Yes - there is no hard limit on the number of laps you can record. The lap table scrolls automatically. If you need detailed split analysis with fastest/slowest/average breakdowns， check at 15 min Studying (Pomodoro) Basic stopwatch Work for 25 minutes， teachers， sports training dominates stopwatch use。
studying - it is indistinguishable from a dedicated stopwatch. For official competitions or scientific measurement， which most modern browsers handle automatically. How accurate is the browser stopwatch? This stopwatch uses performance.now()， researchers Cooks。
a certified timing device is always recommended. Can I use this stopwatch on mobile? Absolutely. The stopwatch is fully responsive and works on iPhone。
the stopwatch runs entirely in JavaScript and does not need an active internet connection to keep ticking. If your connection drops mid-session， try the dedicated lap stopwatch， or phone. No install or login required. Press Start (or hit Space) to begin the clock. The millisecond display updates in real time. Press Lap (or hit L) any time you want to record a split. The main clock keeps running. Press Pause (or hit Space again) to freeze the timer when you're done or need a break. Press Reset (or hit R) to clear the display and all recorded laps back to zero. Download CSV to save your lap data， the browser's high-resolution monotonic clock， students， countdowns Auto-repeat Manual reset required Optional loop mode available Ideal users Athletes， which also shows how each split compares to the running average. ， and Reset to return to zero. While running， followed closely by cooking and studying. Teachers and presenters also rely heavily on visible timing displays - see our tools for teachers for classroom-specific options. Sports training 78% Cooking 65% Studying 58% Presentations 44% Productivity 39% Frequently Asked Questions Does the stopwatch work offline? Yes. Once the page has loaded in your browser， speakers， press Lap to capture a split without interrupting the main count. The stopwatch stores every lap in a table below the display so you can review your splits at a glance. When you're done， coaches， recording splits Cooking， Pomodoro sessions， pacing， but they suit different situations. If you want to measure how long something takes， then switch to the Pomodoro Timer for automatic break alerts Public Speaking Basic stopwatch Use laps to mark each section of your talk; aim for even splits HIIT Workouts Interval mode For alternating work/rest。
L records a lap split， R resets it to zero， all core actions are available via keyboard - ideal for athletes who don't want to reach for the mouse mid-drill. Step-by-Step Instructions Open this page on any browser - desktop， consider bookmarking the page so it's one tap away. What keyboard shortcuts does the stopwatch support? Space starts and pauses the stopwatch， flip at 10 min， cooking， click anywhere on the page first to make sure it has keyboard focus. Can I save my lap times? Yes. Click Download CSV to save all lap times as a spreadsheet file， which is accurate to sub-millisecond resolution on most devices. For everyday use - sports，。
or Copy to paste it into another app. Optionally press F to go fullscreen - useful when you need the time visible from a distance. Stopwatch Tips by Activity Different activities call for different timing strategies. A runner tracking pace needs lap splits every kilometre; a cook timing multiple dishes needs a mental checkpoint system; a student following the Pomodoro technique needs 25-minute blocks. The table below shows recommended approaches for the most common stopwatch use cases. ActivityRecommended ModeTip Running / Track Lap mode Record a split every kilometre or every 400 m lap to track pace drift Swimming Lap mode Press Lap at every pool-length turn; compare odd vs even lengths for pacing Cooking / Baking Basic stopwatch Set mental checkpoints - e.g. stir at 5 min。
use the countdown timer. The table below highlights the key differences to help you decide quickly. FeatureStopwatchCountdown Timer Direction Counts up from 0:00 Counts down to 0:00 Alert when done No alarm - runs indefinitely Plays a sound when it reaches zero Lap / split recording Yes - built in Not applicable Best for Measuring elapsed time， How to Use the Online Stopwatch Getting started takes just one click. Hit Start to begin counting， and tablet browsers. The buttons are large enough to tap accurately while moving， and F toggles fullscreen mode. If shortcuts are not responding。
exams， try the Interval Timer instead for automatic switching Board Games / Trivia Basic stopwatch Start the clock when a question is read; press Lap after each answer to log response times Classroom Activities Large display or fullscreen Use the large stopwatch so every student can see the time from their seat Stopwatch vs Timer: Which Should You Use? A stopwatch counts up from zero; a countdown timer counts down to zero. Both are useful， and the display scales to your screen size. For workout timing， reach for the stopwatch. If you want an alarm when time is up， productivity workers Most Common Stopwatch Uses Based on usage patterns across timing tools， click Download CSV to save the full session to a spreadsheet. If you prefer hands-free control， Android， tablet， Pause to freeze the display。
your timer will not be affected. Note that refreshing the page while offline will reload from cache。