The Cycling Watts Calculator lets you see in realtime how changes to bike weight, wheelset, tire choice, wind conditions, hill gradient and other factors affect how much wattage is required to go a certain speed.

- Calculate how many watts you need to take the KOM!
- See how much a headwind and tailwind can affect your speed
- Compare real world impact of different tire choices in various conditions
- Explore importance of aerodynamic drag based on your bike position, wheelset choice and how it varies based on speed and slope

- Works offline
- Supports both metric (km/h) and imperial (mph)