Stefan-Boltzmann Calculator
Calculate Radiated Power
Formula
P = ε × σ × A × T⁴, where ε is emissivity, σ = 5.67 × 10⁻⁸ W/(m²·K⁴), A is surface area, T is temperature in Kelvin.
Frequently Asked Questions
What is the Stefan-Boltzmann Law?
The Stefan-Boltzmann Law states that the total energy radiated per unit surface area of a blackbody per unit time is proportional to the fourth power of its temperature: P = εσAT⁴.
What is emissivity?
Emissivity (ε) is a measure of how effectively a surface radiates energy compared to a perfect blackbody. A blackbody has ε = 1; real objects have ε < 1.