Power-to-Weight Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter details
Power(W)
Body weight(kg)
Result
Fill in the fields to see your result.
Estimate only — real results depend on terrain, weather, fatigue, conditions and individual fitness. Not medical or coaching advice.
How to use this calculator
- Enter your power (W) and body weight (kg).
- Read your power-to-weight in W/kg.
How it works
Power-to-weight = watts ÷ body weight (kg). It strongly predicts climbing performance.
Worked example
250 W at 75 kg. = 3.33 W/kg.
Tips
- Times are estimates only — not medical or coaching advice. Always train safely and follow event rules.
- Distances are editable: choose “Custom…” to enter your own course lengths.
Frequently asked questions
FTP or peak power?
Use FTP for sustained climbing comparisons, or peak power for sprint comparisons — just be consistent.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.