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Swimming pace calculator

Compute your swimming pace per 100 m and speed from a distance and time.

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Enter Pool units, Distance, Time (minutes) and the Swimming pace calculator works out Pace per 100, Speed straight away. For instance, with Pool units = Metres, Distance = 1,500 and Time (minutes) = 30 it returns Pace per 100 = 2:00 / 100 m and Speed = 0.83 m/s.

How to use it

  1. Enter your values: Pool units, Distance, Time (minutes).
  2. Read the result instantly: Pace per 100, Speed.

Frequently asked questions

How does the Swimming pace calculator work?

It takes Pool units, Distance and Time (minutes) and derives Pace per 100 and Speed from them. The calculation is live as you type, so the result updates on every change.

Which values does the calculator ask for?

3 values: Pool units, Distance and Time (minutes). Nothing else is required — no account, no file upload.

What does a typical calculation look like?

With Pool units = Metres, Distance = 1,500 and Time (minutes) = 30, the calculator returns Pace per 100 = 2:00 / 100 m and Speed = 0.83 m/s. Those figures come from running this exact tool, so you can reproduce them by entering the same values.

Which “Pool units” option should I choose?

You can pick between « Metres » and « Yards ». Each one changes what the calculator works out, so switch and compare — the default is « Metres ».

When would I actually use this?

Preparing a race: the pace a target time needs, the splits to hold it, and the training zones that sit under it — on foot, and equally on a bike or in a pool, where the same session is measured in watts or in a hundred-metre split instead.

What is the most common mistake?

Scaling a time linearly to a longer distance. A marathon is not two half-marathons; race predictors use an exponent around 1.06 precisely because fatigue is not proportional.

How accurate is it, and what are the limits?

For general guidance only — not medical advice.

What is the difference between the Swimming pace calculator and the Swimming SWOLF calculator?

This one returns Pace per 100 and Speed; the Swimming SWOLF calculator returns SWOLF per 25 m and SWOLF score. That is the whole difference — open the one whose figure you need.

Is there a tool for the next step?

Pace Calculator is the closest one after this: Compute your running pace (min/km) and average speed from distance and time.

What else is worth having open alongside it?

Pace to finish time calculator and Target race pace calculator — they come up in the same task often enough to be worth a second tab.

Further reading

All guides →
GuideHow to Pace Your SwimSwimming pace is measured per 100 metres. Here's how to work it out, why even pacing wins, how the pace clock helps, and how to get faster.ExplainerCalories Burned Swimming: MET Values by Stroke and IntensityHow many calories does swimming burn? Learn the MET-based formula, typical MET values for freestyle, breaststroke, backstroke, and butterfly, and how weight and effort change the total.How-toHow to Calculate Your Running PaceRunning pace is time per kilometre or mile. Here's how to work it out from any run, convert between units, and use it to pace a race without blowing up.ExplainerMaximal Aerobic Speed: The One Number That Sets Every Training PaceMaximal aerobic speed is the slowest speed at which you reach your VO2max. Because it is a speed and not a heart rate, every training zone becomes a percentage of something you can measure on a track — and the whole week falls out of one test.GuideHow to Pace a 5KDivide your goal time by 5 to get the pace to hold, then run even splits. Here's how to find your target pace, train for it, and race it well.ExplainerTraining Zones Are a Model, Not a MeasurementEvery zone scheme is a set of percentages of some anchor, and the anchor is the whole argument. One runner, three published schemes: the ceiling of easy aerobic work lands at 131, 141 or 150 bpm. And if the anchor is 220 minus age, a two-standard-deviation error moves one boundary by 30 bpm.