Cycling
Cycling Calorie Calculator
Convert average power and ride time into work done (kJ) and an energy-burn estimate (kcal).
Free · instant · no sign-upDeterministic
Result
Work done648kJ
Energy burned (approx.)648kcal
≈ 1 kcal per kJ of work at ~24% efficiency.
Approximation using the well-known kJ≈kcal relationship for cycling; requires a power meter.
The formula
Work-to-energy
kJ = power × time; kcal ≈ kJ
Source: The kJ≈kcal relationship (~24% gross efficiency)
What it means
- With a power meter, cycling energy burn is unusually accurate.
- The neat coincidence: kilojoules of work ≈ kilocalories burned.
Limitations
- Needs a power meter — heart-rate or speed estimates are far rougher.
- Educational estimate, not a nutrition prescription.
Educational only
This calculator gives general, educational estimates about training and physiology — not personal, medical or nutritional advice. Numbers vary between individuals; check with a qualified coach or healthcare professional before acting on them.
Keep exploring
Follow the threads from this tool into the wider knowledge base.