What is FTP?

Functional Threshold Power (FTP) is the highest power you can sustain in a steady effort for about an hour. It's the most widely used benchmark in cycling for setting training zones, tracking fitness gains, and pacing races. Because a genuine one-hour all-out test is brutal to pace, FTP is normally estimated from a shorter 20-minute test, taking 95% of that average power to account for the fact you can hold slightly more power for 20 minutes than for a full hour.

How to Use This Calculator:

• Complete a 20-minute time trial at max sustainable effort.
• Enter your average power (watts) for the 20 minutes.
• Optionally enter your body weight to calculate watts/kg.
• Choose whether you want output in watts or watts/kg.