Swim Pace Calculator
Turn a swim distance and time into your pace per 100 yards or meters, plus speed.
How it works
pace per 100 = time ÷ distance × 100
Swimmers talk in time per 100 rather than speed, because sets are built from repeats of 50s, 100s and 200s. Divide total seconds by the distance, multiply by 100, and you have the number to hold on the pace clock. Yards and meters differ by almost 9% — a meter pool is longer — so the converted line matters when you switch pools.
Worked example
A 500-yard swim in 8:20 (500 seconds): 500 ÷ 500 × 100 = 100 seconds, a 1:40 pace per 100 yards — about 1:49 per 100 meters, or 2.05 mph.
Frequently asked questions
What is a respectable pace per 100?
Fit lap swimmers commonly hold 1:45–2:15 per 100 yards for distance sets; competitive masters swimmers go 1:10–1:30, and elite freestylers race well under a minute. Open water adds time for sighting and chop.
Why is my meter pace slower than my yard pace?
It isn’t really — 100 meters is 109.4 yards, so the same swim speed reads about 9% slower per 100 m. Always compare paces in the same course.
How do I pace a longer swim from this?
Multiply: a 1:40/100 yd pace projects a 16:40 for 1,000 yards. Expect to drift a few seconds per 100 slower as distance grows unless you train the distance regularly.
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This calculator is for educational purposes. Double-check important results before acting on them.