Free Online Stopwatch with Lap Times (No Signup)

A highly accurate, free online stopwatch with split/lap time functionality.

100% FreeLap TimesHigh Precision

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Overview

Whether you are a track coach timing a sprint, a student seeing how fast they can complete a math test, or a speaker practicing a presentation, a reliable stopwatch is an essential tool. Our Free Online Stopwatch provides a professional-grade timing experience directly in your web browser. It features a massive, easy-to-read digital display that tracks time down to the hundredth of a second with perfect accuracy.

While a simple start and stop button is fine for basic tasks, many situations require tracking multiple intervals. That's why we built a robust "Lap Time" feature into this tool. While the stopwatch is running, simply click the "Lap" button (or use it on your phone). The tool will instantly record the overall elapsed time and, crucially, calculate the exact "split time" since your last lap. This is incredibly useful for coaches tracking 400m repeats or video gamers timing speedrun segments. If you need to count down rather than up, you might want to try our Pomodoro Timer instead.

Because the stopwatch uses your device's internal performance clock (rather than relying on internet pings), it is immune to network lag. Even if your Wi-Fi disconnects, the stopwatch will continue running perfectly. Furthermore, we designed it to be highly visible. The large, high-contrast numbers can be easily read from several feet away, making it a great tool to display on a projector during classroom activities or business meetings.

This stopwatch is 100% free, completely ad-free in the interface, and requires no downloads or sign-ups. Bookmark this page for whenever you need precise timing on demand.

Key Features

Millisecond Precision: Built using high-performance web APIs to ensure the timer is accurate down to the millisecond, perfect for athletic events or speedrunning.

Unlimited Lap Times: Record as many 'laps' or 'splits' as you need. The tool automatically calculates the time difference between each lap.

Sleek Dark Mode Design: A beautiful, high-contrast digital display that is incredibly easy to read from across the room, making it ideal for presentations.

Dynamic Browser Tab: The stopwatch time updates directly in your browser tab's title, allowing you to monitor the elapsed time even while browsing other websites.

No Installation Required: Works instantly and seamlessly in your browser on both mobile phones and desktop computers.

How to Use Online Stopwatch

1Click the green 'Start' button to begin the stopwatch. The timer will start counting up immediately.

2If you want to record a specific interval (a lap), click the 'Lap' button while the timer is running. Your laps will appear in a list below the timer.

3To pause the timer, click the red 'Stop' button. You can resume at any time by clicking 'Start' again.

4To reset the stopwatch back to zero and clear all lap data, click the circular 'Reset' icon.

5Scroll down to view your full history of lap times. You can clear the lap history independently by clicking 'Clear Laps'.

Benefits

Highly Accurate: Uses the browser's RequestAnimationFrame and Performance.now() APIs, which are far more accurate than standard JavaScript intervals.
Easy to Read: The massive typography ensures you can see the time even if your laptop is sitting on the floor while you do a workout.
Multitasking Friendly: Because the time updates in the tab title, you don't have to keep the stopwatch window open to know how much time has passed.
Zero Cost: Advanced stopwatches with split tracking usually cost money as mobile apps. Ours is completely free.

Common Use Cases

Athletics & Workouts

Coaches and athletes can use the lap feature to time sprints, swim intervals, or rest periods during high-intensity interval training (HIIT).

Public Speaking

Speakers can place a laptop with the stopwatch running at the edge of the stage to ensure they don't go over their allotted presentation time.

Cooking & Baking

Track the total time a recipe takes, while using the lap feature to monitor the time between different steps (like kneading dough or resting).

Tips & Best Practices

If you are using this on a smartphone at the gym, make sure to turn off your phone's 'Auto-Lock' or 'Screen Sleep' setting so the display stays on.
The lap table shows both the 'Lap Time' (the time taken for that specific segment) and the 'Overall Time' (the total elapsed time).
You can quickly glance at your browser tabs at the top of your screen to see the running time without leaving your current webpage.

FAQ

Is this stopwatch really accurate?

Yes. Unlike older web timers that relied on imprecise 'setInterval' loops, our stopwatch uses the browser's internal high-resolution time API (performance.now()), making it accurate to a fraction of a millisecond.

Will the stopwatch keep running if I switch tabs?

Yes, the stopwatch is tied to your system's clock. If you switch tabs and come back, it will automatically calculate the exact time that has passed and display the correct value.

Is there a limit to how many laps I can record?

There is no hard limit to the number of laps you can record. You can record hundreds of laps, and they will simply populate the scrollable table below the timer.

Can I export my lap times?

Currently, you can easily highlight the lap table with your mouse, copy the text (Ctrl+C / Cmd+C), and paste it directly into an Excel spreadsheet or our Online Notepad tool.

Does it work without an internet connection?

Once the web page has fully loaded on your device, the stopwatch relies entirely on your local browser. It will continue to function perfectly even if your internet goes down.

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