Swim CSS Calculator

Estimate your Critical Swim Speed (CSS) pace from two time trials.

Units:

Test 1

Longer time trial (e.g., 400m)

Distance (m)

Time

Min

Sec

Test 2

Shorter time trial (e.g., 200m)

Distance (m)

Time

Min

Sec

Results

CSS pace and predicted times

CSS Pace

—

Predicted 100m

—

Predicted 200m

—

Predicted 400m

—