bike watts to calories

🚴 Bike Calorie Calculator

Total Energy Burned 0 kCal (Calories)
Based on the 1 kJ ≈ 1 kCal conversion ratio.

How to use this Calculator

This tool converts your power output (Watts) directly into Calories burned. This is considered the most accurate method for measuring energy expenditure while cycling, far superior to heart-rate based estimates.

  1. Enter Average Watts: Check your cycling computer (Garmin/Wahoo) or Strava ride data for your "Avg Power."
  2. Enter Duration: Input how long you rode in hours and minutes.
  3. Click Calculate: The result is your total metabolic energy burned.

Why does this work? This uses the 1:1 conversion ratio. Because the human body is roughly 24% efficient at cycling, the kilojoules (kJ) of work you perform on the bike cancel out the metabolic math, meaning 1 kJ of Work ≈ 1 Calorie burned.