How is swim pace per 100 calculated?

Pace per 100 = (total seconds ÷ total distance) × 100, expressed as minutes and seconds. For example, 1500 m in 25:00 is 100 seconds per 100 m, or 1:40 / 100 m.

Can I use yards instead of metres?

Yes. Switch the unit to yards for pace per 100 yards. Average speed is still shown in m/s and km/h using 1 yard = 0.9144 metres.

Is my swim data uploaded?

No — every calculation runs locally in your browser and nothing is sent anywhere.

Swim Pace Calculator

Work out your pace per 100 m or 100 yd and average swim speed.

Swim pace calculator

Turn any swim into a clear pace per 100 metres or 100 yards plus an average speed. Enter the distance you covered, pick your unit, and add your time — the pace and speed (in m/s and km/h) update instantly.

Pace per 100 is the standard way swimmers compare efforts across different set lengths and pools. The maths runs entirely in your browser, so nothing about your training leaves your device.