Calculate the luminosity of a star using the Stefan-Boltzmann law based on its radius and surface temperature. This reveals the total energy output of a star across all wavelengths.
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Sun ≈ 696,000 km
Sun ≈ 5778 K, blue stars > 30,000 K
How this calculator works
Luminosity equals four pi times radius squared times the Stefan-Boltzmann constant times surface temperature to the fourth power.
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.
