bikecalcs.uk
Ramp Test Calculator — FTP from Ramp Test
Calculate your FTP from the last completed step in a ramp test.
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
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.
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.
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.
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.
Related Calculators
FTP Calculator
Estimate your Functional Threshold Power from test results.
Power Zone Calculator
Calculate power-based training zones from your FTP.
Training Stress Calculator
Calculate TSS (Training Stress Score) from power, duration, and FTP.
Heart Rate Zone Calculator
Calculate heart rate training zones from max or threshold HR.
TSS Calculator
Calculate Training Stress Score from power and duration.
Was this calculator helpful?
Last updated: June 2026
All calculations are estimates. Always verify results and consult a professional bike fitter where appropriate.