Watts Per Kilogram Calculator
Compute your power-to-weight ratio using your weight and FTP.
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Your Inputs
Enter body weight and FTP.
Your Results
Watts per kilogram.
Power-to-weight ratio
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Watts/kg
Power-to-weight ratio distribution
Enter weight and FTP to see your percentile.
About Watts Per Kilogram
Watts per kilogram (W/kg) is a key metric in cycling performance. It represents your power output relative to your body weight, making it useful for comparing cyclists of different sizes.
FTP (Functional Threshold Power) is the highest power you can maintain for approximately one hour. It's typically determined through a 20-minute time trial or similar test.
Percentile rankings are based on general cycling population data. Higher W/kg values indicate better power-to-weight ratios.
FAQ
- What is watts per kilogram (W/kg)?
- Watts per kilogram is your power output relative to body weight. It is a key cycling performance metric because it lets you compare riders of different sizes.
- What is FTP?
- FTP (Functional Threshold Power) is the highest power you can maintain for approximately one hour. It is typically estimated from a 20-minute time trial or similar test.
- How are percentile rankings interpreted?
- Percentile rankings are based on general cycling population data for All, Male, or Female groups. A higher percentile means a stronger power-to-weight ratio relative to that group.
- What's a good watts/kg for an age-grouper?
- There is no single good number for every athlete. Many recreational age-groupers sit roughly in the mid-range of the distribution (around 2.5–3.5 W/kg), while stronger amateurs trend higher. Use the calculator's percentile chart to see where you land for your comparison group.
Updated July 2026
