Stefan–Boltzmann

P = εσAT⁴.

T (K)

Area (m²)

Tab to move between fields

Power (W)

914.33

How to Use This Calculator

Enter the blackbody surface temperature T (K).
Set the emitting surface area (m2).
Enter emissivity (1.0 for perfect blackbody, 0.95 for most non-metallic surfaces, 0.05 for polished aluminum).
Review total radiated power in watts.
Use for thermal engineering, building energy analysis, or stellar luminosity estimates.

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