Upload a FIT file from a hard ride or race — ideally one with sustained efforts above FTP that lasted at least 2 or 3 minutes and where you eventually reached your limit. Xert estimates your FTP, Peak Power, Lower Threshold Power, and High-Intensity Energy right in your browser session. Nothing is saved to your account.
FTP, or Functional Threshold Power, is the highest power output a cyclist can sustain for about one hour in a steady effort. Learn more.
Upload a FIT file from a hard ride or race effort with sustained work above threshold. The estimator analyzes your effort profile and returns an FTP estimate. Learn more.
Use a file from a hard ride or race that includes sustained efforts above FTP for at least two to three minutes and reaches your limit.
No. The estimate is calculated in your browser session for this tool and is not saved to your Xert account.
A single-ride estimate is useful for a quick check, but full training-history analysis is generally more accurate. Learn more.
