Nothing to install, nothing to sign up for
Open the online stopwatch and start counting in the same second. No account, no email, no trial.
Online Stopwatch
Free · No sign-up · Works in your browser
00:00.00
Free Online Stopwatch
Time anything in your browser — runs, swim laps, workout sets, cooking, classroom activities, presentations, and games. Record unlimited lap and split times with a single tap. The stopwatch is fully free, runs offline once loaded, and works on iPhone, Android, tablet, and desktop.
Quick answer
Online Stopwatch is a free browser tool from SimpleCounter. Free online stopwatch with lap times. Accurate to a hundredth of a second. Perfect for sports, workouts, cooking, and classroom timing. No install needed. Enter your values and the result updates as you type — there is nothing to install and no account to create.
- Definition: Online Stopwatch
- An online stopwatch takes the numbers you enter and returns the result using the standard formula for that calculation, so you do not have to work it out by hand.
Key facts
| Cost | Free, with no account and no usage limit. |
|---|---|
| Where the maths happens | In your browser. The values you type are not sent to a server. |
| Devices | Any modern browser on phone, tablet, laptop or desktop. |
| Accuracy | Standard published formulas, shown with the units you selected. |
| Intended use | Estimates for everyday and educational use, not professional advice. |
How to use the online stopwatch
- Type your value into the first field.
- Choose the unit or option that matches your figures, if the tool offers a choice.
- Read the result — it recalculates immediately, with no submit button.
- Change any input to compare a second scenario side by side.
How this page relates to the rest of the site
- Type of
- Free online tool
- Related tools
- Online counter, Online stopwatch
- Explained in
- Guides and how-tos
- Published by
- SimpleCounter
Disclaimer: This tool is provided for educational and informational purposes only. Results are estimates based on standard formulas and the inputs you provide. For financial, medical, legal, or tax decisions, consult a qualified professional. See our full disclaimer.
Frequently Asked Questions
Is this stopwatch accurate?
Yes. It uses your browser's high-resolution timer (performance.now) and is accurate to a hundredth of a second for typical use.
Does the stopwatch keep running if I switch tabs?
Yes — elapsed time is calculated from real timestamps, so even if the browser throttles the tab in the background, the time stays correct when you return.
Can I record lap times?
Yes, tap Lap while the stopwatch is running to record split times. Laps are shown newest-first below the timer.
Do I need to install anything?
No. The stopwatch runs in any modern browser on phone, tablet, or desktop — no app or signup required.
Benefits of using the Online Stopwatch
What you actually get compared with a mechanical clicker, a notes app, or trying to hold the number in your head.
Your count survives real life
Totals are saved on your device as you go, so a locked screen, a closed tab, or a lost signal does not reset anything.
Works offline once loaded
Install it to your home screen and it keeps working in a warehouse, a pool hall, a field, or a plane — no connection needed.
Private by default
Counts stay in your browser. There is no cloud sync, no profile, and nothing about what you count is sent to us.
Free, with no sign-up
Works offline once loaded
Counts stay on your device
Installable as an app
Runs in your browser — nothing to download
72+ counter types available
Share your setup
We publish only real, attributed feedback here — so this space is intentionally empty until we have your words to put in it. Tell us what you use the online stopwatch for and we will add your story, with your name, to this page.
Share your experienceMore on fitness and sport
This page is part of our fitness and sport section. Start from Rep Counter for the overview.
Rep Counter — Counts reps, sets and rounds for any workout.
- Pushup Counter — Push-up specific counting and daily totals.
- Exercise Rep Counter — Rep tracking across mixed exercises.
- Lap Counter — Laps for swimming, running and cycling.
- Pitch Counter — Pitch counts for baseball and softball.
- Score Keeper — Two-side scoring for games and matches.