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ThermoCalc
Every object radiates heat — the Stefan-Boltzmann law says how much, and it scales with T⁴.
Radiated power scales with the fourth power of absolute temperature — double the temperature and radiation increases 16-fold. This is why a glowing-hot iron bar at 1000 K radiates roughly 16 times more than the same bar at 500 K, and why the Sun (5778 K) emits an enormous amount of energy.
A perfect blackbody has emissivity ε = 1 and radiates the theoretical maximum. Real surfaces have ε < 1: polished aluminum is about 0.05 (poor radiator), while matte black paint is about 0.95 (nearly ideal). This is why spacecraft use different surface coatings to manage thermal radiation.
Total power (W)
63,200,699.735
P = εσAT⁴
What you entered
Radiant flux: j = εσT⁴
1 × 5.6704e-8 × 5778⁴= 6.3201e+7 W/m²Total power: P = j × A
6.3201e+7 × 1= 6.3201e+7 WResult
Total power (W): 63,200,699.735
A body at 5778 K (ε = 1) with 1 m² surface area radiates 6.3201e+7 W.