Calories Burned Cycling Calculator
Estimate the calories you burn on a ride from your weight, speed and time.
How to use the calories burned cycling
- Enter your weight and choose a unit.
- Enter your average speed and ride duration.
- Click Calculate to see estimated calories burned.
Why speed matters so much
Air resistance rises with the cube of speed, so riding faster burns disproportionately more calories. A power meter (see our power-to-calories tool) gives the most precise figure.
What drives cycling calorie burn
Unlike running, cycling is not fully weight-bearing, so speed, power output, and air resistance matter more than body weight on flat ground. Riding faster sharply increases the energy cost because aerodynamic drag rises with the square of speed.
Power meters give the truest number
If you ride with a power meter, calories burned can be estimated very accurately from total work done, since roughly four kilojoules of work corresponds to about one kilocalorie burned given human efficiency. Without power, speed-and-time estimates like this one are a solid approximation.
Frequently asked questions
How many calories does cycling burn?
A 75 kg rider burns roughly 600 calories per hour at a moderate 25 km/h, rising steeply with speed because air resistance grows.
Is cycling good for weight loss?
Yes — it burns significant calories with low joint impact, making it easy to sustain long sessions. Pair it with a modest calorie deficit for fat loss.
Why does cycling speed affect calories so much?
Air resistance rises with the square of speed, so going faster dramatically increases the power, and therefore calories, needed to maintain it.
Are power meter calorie estimates accurate?
Very. Because human efficiency is fairly consistent, kilojoules of work done map closely to kilocalories burned, making power-based estimates the most reliable.
Does cycling burn fewer calories than running?
Per hour at easy effort, often yes, because cycling is not weight-bearing. At high power outputs, cycling can match or exceed running's burn.
Related tools
Power to Calories Calculator
Turn your average power and ride time into calories burned and total work done.
Cycling Power Calculator
Estimate the watts required to hold a given speed on a given gradient, with a breakdown of where the power goes.
Calorie Deficit Calculator
Turn a goal weight and timeframe into the daily calories and deficit you need to hit it.