Swimming Pace Calculator

Calculates swimming pace per 100m or 50m, speed, distance or time from the others.

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Enter details

Distance(m)

Time

Result

Fill in the fields to see your result.

Estimate only — real results depend on terrain, weather, fatigue, conditions and individual fitness. Not medical or coaching advice.

Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.

How to use this calculator

Enter the distance you swam (in metres).
Enter the time as hours : minutes : seconds.
Read your pace per 100 m, per 50 m and speed.

How it works

Pace per 100 m = total time ÷ (distance ÷ 100). Pace per 50 m is half that; speed (m/s) = distance ÷ time.

Worked example

1500 m swim. 1500 m in 30:00 = 2:00 /100 m.

Common mistakes

Entering a lap count instead of total distance — pace is distance over time.
Comparing pool and open-water paces directly when conditions differ.

Tips

Times are estimates only — not medical or coaching advice. Always train safely and follow event rules.
Distances are editable: choose “Custom…” to enter your own course lengths.

Frequently asked questions

What is a good swimming pace?

For fitness swimmers 2:00–2:30 per 100 m is common; competitive swimmers hold well under 1:30 — judge against your own trend.

How do I convert pace to speed?

Speed (m/s) = distance ÷ time in seconds; a 2:00 /100 m pace is about 0.83 m/s, or roughly 3 km/h.

Does pool length matter?

Not for pace — it's based on total distance and time. Use the Pool Lap tools if you need lap counts.

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Cite this tool

Zerdly. (2026). Swimming Pace Calculator. Retrieved from https://www.zerdly.com/tools/swimming-pace-calculator/

Tip: Enter any known values to calculate the remaining results.

All calculations run in your browser. Your inputs are never saved or transmitted.