Cycling Calculators: Speed, Power, Gears & FTP
Speed/time/distance, watts needed, gear ratio and FTP zones in one page · free, no signup
See Cycling Calculators: Speed, Power, Gears & FTP in action
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.
Key features
Speed, time, distance
Solve for any one.
Power model
Weight, CdA, gradient, wind.
Gear and cadence
Speed from rpm.
FTP zones
7 zones in watts.
How to use it
- Use the section you need.
- Enter your numbers.
- Read results instantly.
Worked example
Example
75 kg rider, 9 kg bike, 30 km/h on flat road in the hoods needs about 205 W (2.7 W/kg).
Who uses this tool
Road and gravel riders
Plan efforts.
Triathletes
Pacing.
Commuters
Time and effort estimates.
Tips for the best results
- Update your FTP every 6 to 8 weeks.
Common mistakes to avoid
- Treating estimates as lab-grade numbers.
Why use AZRS QuickFix?
It is 100% free, needs no signup and has no watermark or usage limits. The tool runs in your browser, so what you type stays on your device, and it works on phones, tablets and desktops. New tools are added every week — bookmark this page or browse the full QuickFix toolbox.
Frequently asked questions
How is FTP measured?
Roughly 95% of your best 20-minute average power.
Is it free and private?
Yes. It is free with no signup. Everything runs in your browser and anything saved stays on your own device.