Cycling Power to Weight Calculator
Enter your power in watts and your body weight in kilograms or pounds to get your power to weight ratio in watts per kilogram.
How to calculate power to weight
- Enter your power in watts, such as your FTP or a sprint figure.
- Enter your body weight in kilograms, or switch to pounds.
- Read your power to weight ratio in watts per kilogram.
Examples
FTP power to weight in kg
power 250 W, weight 70 kg
3.57 W/kg
Power to weight from pounds
power 300 W, weight 154 lb
4.29 W/kg
Frequently asked questions
What is power to weight in cycling?
Power to weight is your power divided by body weight in kilograms, written as watts per kilogram. It strongly predicts climbing speed and overall performance.
What is a good W/kg for cyclists?
Recreational riders often sit near 2 to 3 W/kg at threshold, trained amateurs around 3 to 4, and elite professionals can exceed 5 to 6 W/kg over an hour.
Should I use FTP or peak power?
Use FTP for sustained climbing and endurance comparisons. Use a short peak power figure if you want to compare sprint or one minute power to weight instead.
How do I convert pounds to kilograms?
Multiply pounds by 0.45359237 to get kilograms. This tool does the conversion for you when you enter your weight in pounds instead of kilograms.
Why does power to weight matter on climbs?
On a climb you work mainly against gravity, which scales with body mass. A higher watts per kilogram means you carry less weight per watt, so you climb faster.
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