Swim Pace Calculator

Work out your swim pace per 100 meters and per 100 yards from a distance and time — the standard way swimmers measure speed. Presets cover the common pool and open-water distances.

How Swim Pace Works

Swimmers measure pace as time per 100 meters or per 100 yards, not minutes per kilometer like runners. It’s the number you’ll see on a pool clock and in training sets:

Pace per 100 = Total time ÷ Distance × 100

A 1,500 m swim in 30:00 is a pace of 2:00 per 100 m.

Meters vs. Yards Pools

A 25-yard pool is common in the US, while most of the world uses 25 m or 50 m pools. Because a yard is shorter than a meter, your per-100-yard time will always be a little faster than your per-100-meter time for the same effort — this calculator shows both so you can compare sessions across pools.

Common Swim Distances

• Sprint: 50–100 m
• Pool mile: 1,650 yd (US) / 1,500 m (Olympic)
• Open-water: 1.5 km (Olympic tri), 1.9 km (70.3), 3.8 km (Ironman)

Build the Whole Triathlon

Pace the bike leg with the cycling speed calculator and the run with the pace calculator, then map an open-water course with the distance calculator.

Get Distance Measure

Download Distance Measure for iOS and start measuring in seconds.