FTP calculator
95% of your 20-minute average power is the usual field estimate.
Worked example
Worked example: 285 W. Estimated FTP. 20-minute average: 300 W. Change the numbers and the result updates immediately.
How to use it
- Warm up, then ride 20 minutes as hard as you can hold.
- Enter the average power of those 20 minutes, not the peak.
- Leave 95% unless you have a reason to go lower. Weight is only for W/kg.
After a warm-up, a maximal 20-minute effort. The standard estimate is 95% of that average. Riders who are very strong on short efforts sometimes sit closer to 90%. It is not a lab test.
Power zones · W/kg · IF and TSS