What this calculator does
Cycling power-to-weight works out watts per kilogram from your power output and body weight, with a rough training category. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
FormulaPower-to-weight (W/kg) = power (W) / body weight (kg)
The inputs explained
| Field | What to enter |
|---|---|
| Power (e.g. FTP) (W) | A number, measured in W. Starts at 250. |
| Body weight (kg) | A number, measured in kg. Starts at 75. |
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How the answer changes with power (e.g. ftp)
Every other input is held at the calculator’s starting values while power (e.g. ftp) varies. Select any row to load that scenario into the calculator.
How the answer changes with power (e.g. ftp)
| Power (e.g. FTP) (W) | Power-to-weight | Approximate category | Reference chart used |
|---|---|---|---|
| 125 | 1.67 W/kg | Untrained | Coggan power-profiling W/kg bands (Training and Racing with a Power Meter), approximate and gender/duration-dependent |
| 188 | 2.51 W/kg | Recreational | Coggan power-profiling W/kg bands (Training and Racing with a Power Meter), approximate and gender/duration-dependent |
| 250 | 3.33 W/kg | Trained / Cat 4 | Coggan power-profiling W/kg bands (Training and Racing with a Power Meter), approximate and gender/duration-dependent |
| 375 | 5.00 W/kg | Excellent / Cat 1–2 | Coggan power-profiling W/kg bands (Training and Racing with a Power Meter), approximate and gender/duration-dependent |
| 500 | 6.67 W/kg | Exceptional / professional | Coggan power-profiling W/kg bands (Training and Racing with a Power Meter), approximate and gender/duration-dependent |
| 750 | 10.00 W/kg | Exceptional / professional | Coggan power-profiling W/kg bands (Training and Racing with a Power Meter), approximate and gender/duration-dependent |