Enter the absolute temperature (K) and the area of the emitting body (m^2) into the Radiant Heat Calculator. The calculator will evaluate the Radiant Heat. 

Radiant Heat Formula

The following two example problems outline the steps and information needed to calculate the Radiant Heat.

RH = σ * T^4 * A

Variables:

  • RH is the Radiant Heat (W)
  • σ is the Stefan-Boltzmann Constant = 5.6703 10-8 (W/m2K4)
  • T is the absolute temperature (K)
  • A is the area of the emitting body (m^2) 

To calculate the radiant heat, multiply the Stefan-Boltzmann constant by the temperature raised to the power of 4, then multiply by the area.

How to Calculate Radiant Heat?

The following steps outline how to calculate the Radiant Heat.

  1. First, determine the absolute temperature (K). 
  2. Next, determine the area of the emitting body (m^2). 
  3. Next, gather the formula from above = RH = σ * T^4 * A.
  4. Finally, calculate the Radiant Heat.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

absolute temperature (K) = 40

area of the emitting body (m^2) = 10

RH = σ * T^4 * A = ?