FTP Calculator

Functional Threshold Power — the highest power you can hold for about an hour. Build your cycling zones from one test.

Test type

Average power (watts)

Bodyweight (kg, optional)

Used for the watts-per-kilo ratio.

Doing the 20-min test
1. Warm up for 15–20 min with a few hard efforts.
2. Ride all-out for 20 min, giving everything in the last 5.
3. Take your average watts × 0.95.

Repeat every 6–8 weeks and watch your numbers climb.

🏍 Zone builder

Five training zones from your FTP.

🔩 W/kg ranking

Compare fitness regardless of size.

⏱ Test options

20-min estimate or full hour direct.

📈 Retest tracking

Re-run every training block.