Lap Counter Online for Swimming & Running

Tap once each time you or your athlete finishes a lap. Big number, undo for mis-taps, and a separate counter per lane or runner.

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Quick Answer

A lap counter is a tally that goes up by one each time someone completes a lap of a pool, track or course. Tally Counter App's lap counter is free and runs in any browser. Tap the large button at each turn or finish, or press Space or Enter on a keyboard, and the total updates in big digits. Undo reverts an accidental tap without resetting the count. Add one labeled counter per swimmer, lane or runner to count several people at once. Counts are saved in your browser on that device and the page works offline, so a poor signal at the pool or the track does not matter. There is no account and no install.

Use Cases

Counting your own swim laps

Prop a phone on the pool edge and tap at each wall. Remember that a 'lap' is sometimes one length and sometimes there and back, so decide before you start and stay consistent.

Counting laps for a swimmer or runner

Coaches and parents tap each time the athlete passes. Large digits can be read from the other side of the lane.

Track sessions and intervals

Count 400 m laps in a workout and use a second counter for completed intervals or sets.

Charity and fun-run lap events

Keep a labeled counter per participant or team and add up laps at the end.

Cycling and velodrome sessions

Tap at the line each time you or a rider come through, while a second counter tracks efforts.

Walking or treadmill laps

Count indoor-track or loop laps toward a daily distance goal.

Why Lap Counter

✓One large tap target and big digits, readable from a distance.
✓Undo removes a mis-tap without touching the rest of the count.
✓One labeled counter per swimmer, lane or runner.
✓Space or Enter counts from a keyboard if you use a laptop.
✓Counts persist in your browser on that device and the tool works offline.
✓Free, no signup, no app to install.

Choose one count point and stick to it

Most lost laps come from tapping at inconsistent moments. Pick one fixed point, such as the wall you push off from or the start line, and tap only there. Tapping at the same moment every time matters more than tapping fast.

Also settle what a lap is before the session: one length or a full return, one loop of the track or two. Write it down if more than one person is counting, so totals stay comparable.

Counting for someone else

When you count for an athlete, a dedicated counter per person avoids mix-ups, and the undo button covers the case where you tap just as they turn around. Call out the lap number to the athlete if they want to know, but keep the tally on the screen as the source of truth.

For longer sessions, note the total at intervals. Counts live in your browser on one device, so a written checkpoint is your backup if the page is cleared.

Frequently Asked Questions

How do I count swimming laps with a phone?

Open the page, rest the phone somewhere dry and visible, and tap the button each time you reach the wall you chose as the count point. Decide first whether one lap means one length or a full there-and-back.

How many metres is a lap?

It depends on the venue. A standard outdoor running track lap is 400 metres in lane one. Pool lengths vary, commonly 25 or 50 metres, and some people count a lap as two lengths. This tool only counts the laps you tap; multiply by your lap distance yourself.

Can I count several swimmers or runners at once?

Yes. Add a counter per person and label it with a name or lane number. Each keeps its own total.

Does it keep the count if my screen locks?

Counts are saved in your browser's local storage on that device, so a locked screen or a reopened tab keeps the number. They do not sync to other devices, and clearing browser data will remove them.

Does it work without a signal?

Yes. After the page has loaded once it keeps working offline.

Can I undo a tap?

Yes, the undo button reverts the last tap on that counter.

Is it free?

Yes. No account, no payment and no limit on laps.

Ready to Start Counting?

Free tally counter, no signup, no app install, no usage limits. Open in your browser and start counting in seconds.