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Cycling calorie calculator

Calories burned on a ride, from your power meter: the work in kJ and the energy it took.

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Work is exact: average watts × seconds ÷ 1000. Calories are an estimate: kJ ÷ 4.184 ÷ efficiency. Riders turn roughly 20–25% of food energy into work and 1 ÷ 4.184 is 23.9%, so 1 kJ of work is close to 1 kcal burned. Sources: NIST (1 kcal = 4.184 kJ); TrainingPeaks, CTS and TrainerRoad (efficiency range, 1:1 rule); Hopker et al., 2010 (measured in trained cyclists).

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<p><a href="https://pedalbrief.com/tools/calories-from-power">Cycling calorie calculator</a> by Pedal Brief</p>

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