Swimming Pace Calculator
Swimmers count in hundreds, so let's speak your language. Drop in a distance and time and get your pace per 100 — plus the per-50 split — in a blink.
Pace per 100 is the number swimmers actually talk in — it makes efforts easy to compare across sets and distances. Pool length, flip turns, and how rested you are all nudge the number, so use it to track your own trend rather than to compare pools apples-to-apples.
How it works
It divides your total time by the distance to find seconds per unit, then scales that up to a clean pace per 100. Pick meters or yards depending on your pool.
Pace per 100 is the currency of swim training — it makes a 400 and a 1,500 comparable and lets you set interval targets that actually mean something.
The per-50 split is handy for pacing shorter reps. It's simply half your 100 pace, assuming an even effort across the swim.
Frequently asked questions
Why per 100 and not per lap?
A lap depends on pool length, which varies. Pace per 100 is a fixed reference every swimmer understands, so you can compare sets, pools, and training days on the same scale.
Do meters and yards really make a difference?
They do — 100 yards is shorter than 100 meters, so the same effort reads as a faster pace in a yard pool. Make sure you pick the unit that matches your pool, or your numbers will look off.
Why is my pool pace faster than open water?
Pools give you walls to push off, lane lines to sight on, and no current or chop. Open water has none of that, so expect your pace to slow down — this calculator reflects controlled pool swims.