Your Cycling Calculators: Speed, Power, Gears & FTP
Four cycling calculators on one page: speed, time and distance; the power (watts) needed to ride at a given speed with your weight, position, surface.
- Free to use
- No signup
- Nothing to install
- Runs in your browser
75 kg rider, 9 kg bike, 30 km/h on flat road in the hoods needs about 205 W (2.7 W/kg).Open the Cycling Calculators: Speed, Power, Gears & FTP
Illustration. Open the tool for the real thing.
See it in action
Sample input: Distance = 40; Hours = 1; Minutes = 30; Speed (km/h or mph) = 26
What is the Cycling Calculators: Speed, Power, Gears & FTP?
Four cycling calculators on one page: speed, time and distance; the power (watts) needed to ride at a given speed with your weight, position, surface, hills and wind (plus watts per kg and calories); gear ratio and cadence to speed; and your FTP training zones.
Based on standard cycling physics (aero drag, rolling resistance, gravity) and the Coggan power-zone model.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
Solve for any one.
Weight, CdA, gradient, wind.
Speed from rpm.
7 zones in watts.
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
Used for
Pick one to see how it fits.
How it compares
A plain look at this tool next to the usual alternative.
| This fitness tool | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
| Where it runs | In your browser tab | On your computer |
Questions people ask
How is FTP measured?
Roughly 95% of your best 20-minute average power.
Is it free and private?
Yes. Speed/time/distance, watts needed, gear ratio and FTP zones in one page. It is free with no signup, runs in your browser, and anything saved stays on your own device. Includes Speed, time, distance; Power model; Gear and cadence.
What is FTP?
FTP stands for functional threshold power, the highest power you can hold for about an hour. The FTP section turns it into training zones.
How do I use the Cycling Calculators: Speed, Power, Gears & FTP?
1. Use the section you need. 2. Enter your numbers. 3. Read results instantly.
Any tips for good results?
Update your FTP every 6 to 8 weeks. Weigh yourself with kit and bike together when you enter weights; the power model depends on the total.
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Speed/time/distance, watts needed, gear ratio and FTP zones in one page. Free to use.
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