FTP Calculator

Calculate your FTP from a 20-minute test or ramp test and get all 5 training zones automatically.

Your average power during the 20-minute all-out effort
For W/kg calculation
For heart rate zone calculation
Watts FTP

Your 5 Training Zones

Zone Name Watts HR
🚀 WattWorks tracks your zones automatically
After every upload, zones + FTP development are calculated automatically — no manual calculator needed.
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How Does the FTP Calculator Work?

The FTP calculator computes your Functional Threshold Power (FTP) from your test result and automatically shows all 5 training zones based on the Coggan model.

20-minute test: Your average power is multiplied by 0.95, since you can sustain slightly more power for 20 minutes than for 60 minutes (your true FTP).

Ramp test: Your maximum 1-minute power is multiplied by 0.75. Faster to perform, similarly accurate.

More Calculators

Learn More About FTP