Stefan–Boltzmann Law
Calculate Stefan–Boltzmann Law instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
Stefan–Boltzmann Law
TemperatureK
Emissivity
Radiant flux
63,196,527W/m²
More about: Stefan–Boltzmann Law
What it calculates
The “Stefan–Boltzmann Law” calculator computes Radiant flux in W/m² from 2 parameters: temperature (K), emissivity.
A standard physics formula used in educational and engineering tasks.
Example calculation
With parameters Temperature = 5,778 K, Emissivity = 1 the result is 63,196,527 W/m² (σ·ε·T⁴).
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.