A poolside split timer,
one tap per lap.
Hit Start, tap Lap at every wall or finish line. The counter records every split, your best lap, and the running average — so the breakdown is right there when you climb out, no spreadsheet at the end.
Lap Counter
Hit Start · tap Lap at every wall · best & average update live
Six places a split timer beats a stopwatch.
Anywhere the work happens in repeating laps and the question at the end is always: was that one faster than the last?
On the wall
50s, 100s, descending sets, broken swims — tap Lap at every wall and the splits land in order with the wet thumb of a deck-side phoneOn the track
400s on the track, miles on the loop, kilometers on the trail — every lap gets its split, the average updates so you know if the workout held shapeOn the velodrome
Track laps, criterium course laps, velodrome flying 200s — tap on the line, the timer keeps the high-resolution clock even with the bars in the windAcross the lanes
Coaching a relay or four masters lanes — open multi-counter and run one lap timer per athlete, each with its own splits and best lap Open multi-counter →Below ground
Rec-center pools where the cell signal dies on the deck — the counter runs in the browser after the page loads, splits save locally between setsAround the circuit
Track-day karts, RC car laps, drone racing splits — tap Lap as the kart crosses the line, the best lap stays highlighted at the end of the heatFour upgrades over a phone stopwatch.
A stock stopwatch app records the split. It does not compute against the average, does not flag your fastest lap, and does not let you take back a mis-tapped lap. This counter does all four.
Best lap and running average, live
Every Lap tap updates the best and average columns in the same row. You see whether the workout is holding shape without having to read the splits one by one.
Per-lap delta vs your average
Every split shows green when it is faster than the running average and red when it is slower. The fastest lap gets a green border so it is obvious at a glance.
Undo a mis-tap
Hit Lap a second early or hit it twice? Tap Undo and the counter rolls back the last split — the timer keeps running so the next lap is measured from where you actually were.
Multi-lane mode
Open the multi-counter view and add one card per lane or athlete. Each one keeps its own timer, splits, and stats — useful for coaches running a relay practice from the bulkhead.
Online lap counter vs the alternatives.
A wristwatch, a phone stopwatch, and a sport-watch app all count laps. Each has a moment where they are the wrong tool for a coach on the deck.
| Online Lap Counter | Wristwatch stopwatch | Phone built-in stopwatch | Sport-watch app | |
|---|---|---|---|---|
| Cost & setup | Free, instant | Buy one | Built-in | Account, sync, paywall |
| Best & average lap, live | Yes | Manual | Splits only | Yes |
| Delta vs running average | Per split | No | No | Sometimes |
| Undo a mis-tapped lap | Yes | No | No | Rarely |
| Works without signal | After load | Always | Always | Depends |
| Multiple athletes side by side | Multi-counter | No | No | One per device |
| Big tap target for wet hands | Yes | Tiny buttons | Small target | Small target |
Lap counter questions.
What people ask before timing laps in the browser — accuracy, undo, multi-lane, offline use.
Q.01 What is a lap counter?
A lap counter is a stopwatch that records a split time every time you finish a lap. The digital version on this page logs lap times, computes your best and average, and shows whether each lap was faster or slower than the running average — without you having to read a spreadsheet at the end of the workout.
Q.02 Will it work poolside with wet hands?
Yes. The Lap button is large and the timer runs in any browser, so a phone or tablet on the bulkhead works fine. There is no precision-tap requirement — just a single big target you can hit with a wet thumb.
Q.03 Does the timer keep running if I swipe to another tab?
Yes. The timer is anchored to a high-resolution clock, so the elapsed time stays accurate even if the page is backgrounded, the screen sleeps, or you switch tabs to read a Garmin export. Lock the screen if you can — the count comes back right.
Q.04 How is this different from a stopwatch app?
A built-in stopwatch app records lap times, but it does not show deltas against your average, does not flag your best lap inline, and does not let you undo a mis-tapped lap. This counter does all three. It also runs in the browser — no install, no permissions, no account.
Q.05 Can I undo an accidental lap tap?
Yes. The Undo button removes the last split and rolls the lap count back by one. The timer keeps running so the next lap you tap is measured from the correct mark.
Q.06 Can I time multiple swimmers or runners at once?
Open the multi-counter view and add one card per athlete or lane. Each one keeps its own timer, splits, and stats — useful for relay practice, masters lanes, or comparing two trail runners on the same loop.
Q.07 Does it work without internet at the indoor pool?
Yes. After the page loads once, the lap counter runs entirely in your browser — no signal needed in a basement pool, on a velodrome, or out on a closed track. Add it to the home screen and it launches like an app.
Q.08 Can I export the splits when I am done?
The free version shows the splits inline. Export to CSV and history sync across devices are part of the paid tier — useful for coaches who want the data in a workout spreadsheet for the week.
Tap Lap. Read it on the deck.
A stopwatch with split times rebuilt for the device already on the deck — best lap, average lap, undo, multi-lane, offline-ready, and free.
Laps, splits, and pace
Background reading on how athletes and coaches use counters across running, swimming, and racing.
