A ramp test starts at low power and increases by a fixed amount (typically 20W) every minute until you cannot continue. It takes about 10-20 minutes and is simpler to execute than a 20-minute test.

Why 75% of the last step?

Research shows that 75% of the power in the last completed minute of a ramp test closely approximates FTP for most cyclists. Some platforms use different percentages.

Is the ramp test accurate?

It is generally accurate for most riders but can overestimate FTP for those with a strong anaerobic capacity (sprinters) and underestimate for diesel-type riders with high endurance.

How do I do a ramp test?

Warm up for 5-10 minutes. Start at 100W and increase by 20W every minute. Ride until you cannot maintain the target power. The test is typically done on a smart trainer in ERG mode.

BikeCalcs

Ramp Test Calculator — FTP from Ramp Test

Calculate your FTP from the last completed step in a ramp test.

Last Completed Step Power

Average power of the last full minute completed

Body Weight

How We Calculate This

Ramp Test FTP Calculation

FTP = Last Completed Step Power x 0.75

The ramp test works because the final minutes heavily tax your VO2max system. The 75% factor converts this peak aerobic output to the sustainable threshold power.

For example, if you complete the 350W step but fail during 370W, your last completed step is 350W, giving an FTP of 263W.

Frequently Asked Questions

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Last updated: 2025-02-20

All calculations are estimates. Always verify results and consult a professional bike fitter where appropriate.