Bike power calculator
A steady-speed estimate, with no wind. It is not a course plan: for a GPX, use Kyrie.
Worked example
Worked example: 34.3 km/h. Steady speed. Total weight with the bike: 78.0 kg. Change the numbers and the result updates immediately.
How to use it
- Choose whether you start from watts or from speed.
- Enter your weight, the gradient, and how you sit on the bike.
- This is a straight road with no wind. For a whole course, open Kyrie.
On a straight road at steady speed we use weight, gradient, position and tires. The bike starts at 8 kg, the air at 18 °C at sea level, with no wind. It is the same base as the race estimate, without corners, drafting or fatigue. For a GPX file, open Kyrie.
Gradient · VAM · Kyrie on a GPX