Swim Pace Calculator
Swim pace per 100 is the universal language of the pool. Because most training sets are built around 100-unit repeats, swimmers measure their speed by how long it takes to cover 100 meters or 100 yards. This calculator turns a total distance and a total time into that pace. The method is simple: divide your total time by the number of 100-unit segments in your distance. You enter the distance you swam and the time it took, and the tool returns your pace per 100 in minutes and seconds, computed deterministically from the formula shown below, so the worked example reconciles exactly with the result on screen. Pace per 100 works identically in meters or yards; just use whatever your pool measures, remembering that a yard pace reads slightly faster than a meter pace for the same effort. Tracking pace rather than total time lets you compare swims of different lengths, set target speeds for interval sets, and judge whether you are holding even effort. Holding a steady per-100 pace is one of the clearest signs of good pacing, a skill that matters in distance swimming and triathlon. Use this tool to find your pace or to plan interval targets.
Swim pace per 100 is total time / distance x 100. Swimming 1,500 meters in 30 minutes gives a pace of 2:00 per 100 meters.
Swim pace formula
pace per 100 = total time / distance x 100
total time = time in minutes
distance = total distance in meters or yards
result = minutes per 100 units
Dividing total time by distance gives the time per unit, and multiplying by 100 scales it to a per-100 pace. Converting the decimal minutes into minutes and seconds gives the familiar pool format.
Worked example
Swimming 1,500 meters in 30 minutes.
- Number of 100s = 1,500 / 100 = 15
- Pace per 100 = 30 / 15 = 2.00 minutes
- 2.00 minutes = 2:00 per 100 meters
The pace is 2:00 per 100 meters. These are the calculator's default inputs, so the result above matches the widget exactly.
Pace and total time examples
| Distance | Total time | Pace per 100 |
|---|---|---|
| 1,000 | 20:00 | 2:00 |
| 1,500 | 30:00 | 2:00 |
| 1,500 | 27:00 | 1:48 |
| 2,000 | 36:00 | 1:48 |
Reference: US Centers for Disease Control and Prevention (CDC).
Swim pace: frequently asked questions
What is swim pace per 100?
Swim pace per 100 is how long it takes you to cover 100 units of distance, usually meters or yards, at your current speed. It is the standard way swimmers express effort, because most pool sets are built around 100s. A pace of 2:00 per 100 means two minutes for every 100 of distance.
How is pace per 100 calculated?
Divide your total time by the number of 100-unit segments in your distance. In other words, pace per 100 equals total time divided by distance, multiplied by 100. For 1,500 meters in 30 minutes, that is 30 divided by 15, which is 2 minutes per 100 meters.
Should I use meters or yards?
Use whichever your pool measures. Most competition and many lap pools are 25 or 50 meters, while many US pools are 25 yards. Pace per 100 works the same in either unit, but a yard is shorter than a meter, so a yard pace will be slightly faster than the same effort in meters.
Why track pace instead of total time?
Pace lets you compare swims of different distances on a common scale, set target speeds for intervals, and judge whether you are holding effort across a long set. A consistent per-100 pace is a sign of even pacing, a key skill in distance swimming and triathlon.
How do I convert pace to total time?
Multiply your pace per 100 by the number of 100s in your target distance. If your pace is 2:00 per 100 and you plan to swim 800 meters, that is 8 segments times 2 minutes, so 16 minutes total. This calculator works in the forward direction, from distance and time to pace.
Official sources
- Physical activity and swimming reference: US Centers for Disease Control and Prevention (CDC). As at 25 June 2026.
Reviewed by the CalculatorHub team, edited by James Graham, 25 June 2026. See our methodology. This is general information, not financial, tax, legal or investment advice.