On average, human consumes around 2000 kilocalories per day. This converts to roughly 2000000 calories / 86400 seconds or around 100 joules / second giving roughly 100 watts.

But if you use human's body temperature of 310 kelvins, Stefan Boltzmann gives Power radiated by a human, with surface area of roughly 2m^2, emissivity ~ 1, to be 1000 watts.

$$P = e \sigma A T^4$$

What am I doing wrong?

On average a human consumes around $2000$ kilocalories per day. This converts to roughly $2000000$ calories / $86400$ seconds or around $100$ joules / second giving roughly $100$ watts.

But if you use human's body temperature of 310 Kelvin, the Stefan-Boltzmann law $$P = e \sigma A T^4$$ says the power radiated by a human with a surface area of $2 \, \text{m}^2$ and emissitivity $1$ is 1000 watts.

What's wrong here?

On average, human consumes around 2000 kilocalories per day. This converts to roughly 2000000 calories / 86400 seconds or around 100 joules / second giving roughly 100 Watts.

But if you use human's body temperature of 310 kelvins degrees, Stefan Boltzmann gives Power radiated by a human, with surface area of roughly 2m^2, emissivity ~ 1, to be 1000 Watts.

$$P = e \sigma A T^4$$

What am I doing wrong?

On average, human consumes around 2000 kilocalories per day. This converts to roughly 2000000 calories / 86400 seconds or around 100 joules / second giving roughly 100 watts.

But if you use human's body temperature of 310 kelvins, Stefan Boltzmann gives Power radiated by a human, with surface area of roughly 2m^2, emissivity ~ 1, to be 1000 watts.

$$P = e \sigma A T^4$$

What am I doing wrong?