Online Stopwatch — Free & Accurate

TimeMaster's online stopwatch provides millisecond-precision time tracking directly in your browser. No downloads or installations needed — just click Start and begin timing. Our stopwatch is ideal for athletic events, science experiments, cooking, classroom activities, and any situation where you need accurate elapsed time measurement.

How to Use the Stopwatch

Click the Start button to begin timing. Press Lap to record split times without stopping the clock — you can record unlimited laps with automatic difference calculations between each lap. Press Stop to pause the timer, and Resume to continue from where you left off. The Reset button clears everything for a fresh start. If you have an account, you can save your session to review later in your Activity History.

Why Use an Online Stopwatch?

An online stopwatch is always accessible from any device with a web browser — your computer, tablet, or smartphone. Unlike physical stopwatches, our digital version provides lap recording, automatic split time calculations, session history, and a clean visual interface. The large, easy-to-read display makes it suitable for presentations, classroom use, and situations where multiple people need to see the time.

Common Uses

• Athletic training and race timing
• Cooking and recipe timing
• Science experiments and lab measurements
• Classroom activities and timed tests
• Board game turn timing
• Speech and presentation practice
• Tracking work session duration