Critical Swim Speed Training Zone
Calculator
Determining Your Critical Power (CP) and W’.
Use this simple calculator to calculate your Critical Swim Speed (CSS) and estimate your ideal swim speed training zones in meters or yards.
A Critical Swim Speed test is a simple way to measure your swim fitness. It estimates the pace per 100 that you would maintain during a maximal 1500 meter or yard time trial.
To test your CSS pace, you would swim a maximal 400 and 200 time trial within the same session, with a five-minute active recovery between, and time yourself for both. Then simply enter your times below and let the calculator do its magic!
Swim Speed Calculator
Critical Swim Speed: - m/s
Pace per 100m: -
Swim Speed Training Zones
| Zone | Feel | Swim Speed (mm:ss / 100m) |
|---|---|---|
| 1 | Easy | - |
| 2 | Steady | - |
| 3 | Moderately Hard | - |
| 4 | Hard | - |
| 5 | Very Hard | - |