Swim Pace Calculator

Swim Pace Guide (per 100m)

What is a good swim pace?

Pace benchmarks per 100m: Elite swimmers are under 1:05, competitive club swimmers range from 1:05–1:20, fitness swimmers from 1:20–1:45, recreational swimmers from 1:45–2:15, and beginners are typically above 2:30. For open water and triathlon swimming, add roughly 5–15 seconds per 100m compared to pool pace.

How do I improve my swim pace?

The biggest gains for most swimmers come from technique improvements — especially body position, pull mechanics, and breathing. After technique, structured interval training (e.g., 10×100m at target pace) builds speed and endurance. Regular drilling and working with a coach or video analysis can accelerate progress significantly.

What is SWOLF?

SWOLF is a swimming efficiency metric that combines strokes per length with seconds per length. A lower SWOLF score indicates greater efficiency. It's calculated by adding the number of strokes for a length to the time taken in seconds. Most swimmers aim for a SWOLF of 30–45 in the pool, with lower being better.

How much slower is open water swimming vs pool?

Most swimmers are 5–15% slower in open water than in a pool due to the absence of walls to push off, navigation demands, potential waves or current, and wetsuit (which can actually help buoyancy but varies by fit). For triathlon race planning, adding 8–12 seconds per 100m to your pool pace is a reasonable starting estimate.

How do I pace my triathlon swim?

Start conservatively — the first 200–400m of a triathlon swim is often crowded and anxiety-provoking, so going out too hard burns precious energy. Aim for a pace that's roughly 5–10% easier than your best straight-line swim pace. For an Ironman swim (3.8km), most age-groupers aim for a 1:40–2:00 per 100m pace.