Thermodynamics – How Much Energy in the Form of Heat Does a Human Body Emit? Comprehensive Analysis

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How much energy in form of heat does a human body emit at rest level?

Best Answer

That's easy. The energy requirement of an average man is 2,500 Calories per day, and one Calorie is 4184J. Therefore he emits about 10.5MJ/day or about 120W.

An average woman requires 2,000 Calories per day, so she emits about 97W.