Bike Calculator

Predict speed from power

The calculators on this page do velocity prediction. You enter your power in watts and they tell you how fast you'll go. There are two independent calculators here so you can compare two sets of input parameters.

A version with Metric units is here. There's also one with numeric inputs instead of menus for tire resistance and frontal area here

See the links at right for other calculators.

Grade is distance traveled divided by rise; enter a negative number for descents. You can enter a negative number for tailwinds. Calories and weight loss are based on the effort expended; basal metabolism is not included.

Bike Calculator - the App

Bike Calculator for iPhone, iPod and iPad! A free app that is a joy to use. A single "Main Control" provides your power and speed. Everything in our online calculators, and more. App Store link. More info here.

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SPEED from Power, Metric units
SPEED from Power, US units

SPEED from Power, all numeric,

POWER from Speed, Metric units
POWER from Speed, US units

Six segments, Power-Metric
Six segments, Power-US

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