How to use the radiation power calculator
Find power radiated by a hot object. Enter emissivity, surface area, temperature in the fields above; the radiated power is computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- e — Emissivity
- A — Surface area (m²)
- T — Temperature (K)
Worked example
With emissivity = 0.9, surface area = 1.5 m², temperature = 310 K, the calculator gives radiated power ≈ 706.9558 W.
Frequently asked questions
What is the formula for the radiation power calculation?
Radiated power (W) = e × SIGMA × A × T^4. Here e is emissivity, A is surface area (m²), T is temperature (K).
What inputs do I need for the radiation power (stefan–boltzmann) calculator?
You need emissivity, surface area in m², temperature in K. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.