Professional swim stopwatch
One precision timer with complete lap controls, target-aware pace analysis, live progress, detailed history, and CSV export.
Professional swim timer
Swim stopwatch
Precision timer
Hundredth-second timing with complete lap control.
00:00.00
Recorded laps
0
Keyboard
Space · L · S · R
Live pace analysis
Recorded laps are normalized to pace per 100.
- Average /100m
- —
- Fastest /100m
- —
- Target delta
- —
- Consistency
- —
1:30.0 per 100m × 50m = 45.0s target.
Lap history
0 recorded laps
Timing stays accurate when the tab is in the background.
Coach-grade timing
Record the lap. Understand the pace.
Use one accurate timer for a swimmer, a lane, or a test effort. Every press of Lap records both the individual lap and cumulative time.
Set the lap distance and target pace to compare normalized pace per 100, consistency, fastest pace, and live progress toward the next target split.
Swim stopwatch questions
What can the Swimio stopwatch record?
The classic stopwatch records one precision timer with unlimited manual laps, individual lap times, cumulative times, pause, resume, stop, undo, clear, and reset controls.
How does live pace analysis work?
Choose metres or yards, the distance represented by each lap, and a target pace per 100. Every recorded lap is normalized to pace per 100 and compared with the target in the chart and summary metrics.
What does Target split 45.0s mean?
It is the target time for one selected lap distance. For example, a target pace of 1:30 per 100 metres produces a 45.0-second target for a 50-metre lap.
Does the stopwatch support keyboard shortcuts?
Yes. Press Space to start or pause, L to record a lap, S to stop, and R to reset when focus is not inside an input.
Can I export the times?
Yes. CSV export includes each lap number, individual lap time, and cumulative total.