Stopwatch
Precision stopwatch with lap recording.
00:00:00.00
Precision stopwatch with lap recording.
Use Shawon Calculators' free stopwatch to get instant, accurate results directly in your browser. No data is stored or transmitted — all calculations happen locally on your device for complete privacy.
Free online stopwatch with lap times, split times, and millisecond precision. Start, stop, reset — works on any device. No app needed. Part of our DateTime calculators collection, trusted by students, professionals, and everyday users worldwide.
Input your numbers into the calculator fields
Results are calculated instantly as you type
Copy results or use them for your needs
Uses standard mathematical formulas and algorithms verified against professional tools.
Your data never leaves your device. All calculations happen locally in your browser.
No hidden fees, no registration. 51+ calculators available for unlimited use.
Responsive design works perfectly on desktop, tablet, and mobile browsers.
Click Start to begin timing, Lap to record a lap time, and Stop to pause. Click Reset to start over.
It uses JavaScript high-resolution timing for millisecond precision, comparable to physical stopwatches.
Yes, 100% free. Runs entirely in your browser.
Yes! Works on any device with a browser — no app download needed.
Shawon Calculators provides 49+ free online calculators across financial, health, math, developer, date/time, and utility categories. Every calculator runs entirely in your browser — no data is sent to any server, ensuring your financial, health, and personal information stays completely private.
From mortgage and loan calculators to BMI, calorie counters, and scientific calculators — our tools cover everyday math, finance, health, and development needs. All calculators provide instant results with no registration, no ads interrupting calculations, and no usage limits. Works on Chrome, Firefox, Safari, Edge, and all modern browsers on any device.