Cycling Power-to-Weight Calculator
Fill in the values and the answer updates as you type.
How the Cycling Power-to-Weight Calculator works
Power-to-weight = power in watts ÷ weight in kilograms. Climbing speed depends mostly on this number, while flat speed depends more on total watts and aerodynamics. Example: with Power (FTP or average) 250 W, Rider weight 70 kg, and Bike and gear weight 9 kg, the result is Watts per kg (rider) = 3.57; Watts per kg (with bike) = 3.16; Rider and bike (kg) = 79.
Inputs and results
The Cycling Power-to-Weight Calculator takes 3 inputs and gives 3 results.
What you enter
- Power (FTP or average) (W) — starts at 250.
- Rider weight (kg) — starts at 70.
- Bike and gear weight (kg) — starts at 9.
What you get
- Watts per kg (rider)
- Watts per kg (with bike)
- Rider and bike (kg)
Example: Cycling Power-to-Weight Calculator with the starting values
With power (ftp or average) 250 W, rider weight 70 kg and bike and gear weight 9 kg, the calculator returns:
| Watts per kg (rider) | 3.57 |
|---|---|
| Watts per kg (with bike) | 3.16 |
| Rider and bike (kg) | 79 |
Change any value above and the results update straight away.
Cycling Power-to-Weight Calculator FAQ
How do I use the Cycling Power-to-Weight Calculator?
Enter power (ftp or average), rider weight and bike and gear weight in the fields, then read watts per kg (rider), watts per kg (with bike) and rider and bike (kg) in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Cycling Power-to-Weight Calculator calculate?
Watts per kilogram from power and body weight. It returns watts per kg (rider), watts per kg (with bike) and rider and bike (kg) from the 3 values you provide.
What values does the Cycling Power-to-Weight Calculator start with?
It opens with power (ftp or average) 250 W, rider weight 70 kg and bike and gear weight 9 kg so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Cycling Power-to-Weight Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Cycling Power-to-Weight Calculator for medical or health decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm medical or health decisions with a qualified professional. See the Disclaimer for more.