Swim Pace Calculator
Example: Total distance: 1500 meters · Pace per 100m: 110 sec/100m
| Total swim time (minutes) | 27.5 |
| Total swim time (seconds) | 1,650 |
| Average speed | 0.91 |
Worked example
Plan a 1,500-meter swim at a pace of 110 seconds per 100 meters. That is 1,500 / 100 = 15 hundred-meter segments, each taking 110 seconds, for 1,650 seconds total, or about 27.5 minutes. The same pace equals a steady 100 / 110 = 0.91 meters per second. If your target time is under that, you know exactly how much you need to trim from your per-100 pace.
Frequently asked questions
How do I measure my per-100-meter pace?
Swim a set distance at a steady, race-realistic effort and time it, then divide the seconds by the number of 100-meter segments. For example, 400 meters in 7 minutes 20 seconds is 440 seconds over four segments, or 110 seconds per 100. Use a pace you can genuinely hold, not a single fast length.
Does pool length change my time?
Yes, subtly. Each turn lets you push off the wall, so a shorter-course pool with more turns is usually slightly faster than the same distance in a long-course pool or open water. This tool projects from the pace you enter, so measure your pace in conditions similar to the swim you are planning.
Why is open-water swimming slower than the pool?
Open water has no walls to push off, plus chop, currents, sighting, and navigation that all cost time. If you are planning an open-water swim, use an open-water pace rather than your pool pace, which will typically be faster than you can hold outside.
How can I improve my swim pace?
Technique usually beats raw fitness in swimming, so refining your stroke, body position, and breathing often lowers your per-100 pace more than simply swimming harder. Interval training at goal pace, plus consistent volume, then builds the endurance to hold that faster pace over the full distance.