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Power-to-weight ratio calculator
Work out your cycling power-to-weight ratio in watts per kilogram from your FTP, and see which level it roughly matches. Free online watt per kilo calculator for riders, with separate levels for men and women.
How to calculate watts per kilo
- 1Choose FTP or a 20-minute all-out average
- 2Enter your power in watts
- 3Enter your weight and sex
- 4Read your W/kg and level
- Your W/kg, your level and the power for the next one.
What you get
- W/kg and a level.From untrained up to world class, using levels rounded from Coggan's power profile.
- The next step.It shows the watts you would need to reach the next level at your weight.
- Nothing leaves your device.The sums run in your browser.
What you can do
- Enter your FTP, or a 20-minute all-out average. The tool takes 95 % of the 20-minute figure as your FTP.
- Weigh in with kilograms or pounds. In pounds you also get watts per pound.
- See the full level table for your sex, from untrained to world class.
- Check how many watts the next level asks for at your current weight.
Good to know
- Power has to be between 20 and 2,500 W.
- The levels are a rough guide for road cycling, not a ranking. They are rounded and the male and female tables differ.
- Rider weight matters on climbs, but flat riding depends more on power against air drag.
Questions
What is a good W/kg?
By these levels, men reach "Good" at 3.4 W/kg and women at 3.0 W/kg. The table on the tool shows every step.
What is FTP?
Functional threshold power: the power you can hold for about an hour. A common test is 95 % of a 20-minute all-out effort.
Should I count bike weight?
The calculator uses the weight you enter. Rider weight alone is the usual way to quote W/kg.
Is my data stored?
No. Everything is calculated in your browser.