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FTP functional threshold power Calculator

Formula

The formula to calculate the Functional Threshold Power (FTP) is:

$FTP = 0.93 \times 20AP$

Where:

$FTP$ is the Functional Threshold Power (watts)
$20AP$ is the average power maintained over a 20-minute all-out biking session (watts)

FTP Definition

FTP stands for Functional Threshold Power. This term is used in the sport of cycling to describe the average power output a cyclist can maintain over an hour of all-out effort. Functional Threshold Power is achieved at between 85-90% of the maximum heart rate. Since an hour-long time trial is mentally and physically exhausting, cyclists use 20-minute time trial estimates for determining Functional Threshold Power (FTP).

Example Calculation

Let's assume the following value:

Average Power Over 20 Minutes (20AP) = 250 watts

Using the formula:

$FTP = 0.93 \times 250 = 232.5 \, \text{watts}$

The Functional Threshold Power (FTP) is 232.5 watts.