Calculate the rate of heat transfer by thermal radiation using the Stefan-Boltzmann law. This calculator accounts for emissivity and is useful for high-temperature applications and thermal imaging.
Enter your values below
Emissivity of the surface (0 to 1)
Surface area
Absolute temperature of the surface
Absolute temperature of surroundings
How this calculator works
The radiative heat transfer rate equals emissivity times Stefan-Boltzmann constant times area times the difference of the fourth powers of temperatures.
Common questions about this calculator
These calculators are for educational and informational purposes only. While we strive for accuracy, results should be verified for critical applications. Always consult authoritative sources for engineering or scientific work.
