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Calcimator

Stellar Luminosity Calculator

Calculate stellar luminosity using Stefan-Boltzmann law. Find absolute magnitude, main sequence lifetime, and stellar parameters.

Inputs

Solar Radii
K
Solar Masses

Results

Luminosity

1.004 Solar Luminosities

Absolute Magnitude

4.83

Main Sequence Lifetime

10,000,000,000 billion years

Apparent Magnitude4.83
Surface Flux63,200,699.73 W/m²

Luminosity

1.004 Solar Luminosities

Absolute Magnitude

4.83

Main Sequence Lifetime

10,000,000,000 billion years

How to Use This Calculator
  1. Start by filling in the input fields below. Results update instantly as you type, so you can experiment with different values to see how they affect the outcome.
  2. Stellar Radius — Radius of the star Accepts values from 0.01 Solar Radii to 1,000 Solar Radii (default: 1 Solar Radii).
  3. Surface Temperature — Effective surface temperature in Kelvin Accepts values from 1,000 K to 100,000 K (default: 5,778 K).
  4. Stellar Mass — Mass of the star Accepts values from 0.01 Solar Masses to 100 Solar Masses (default: 1 Solar Masses).
  5. Once all inputs are set, review your results in the Results panel. Here's what each output means:
  6. Luminosity — shown as a numeric value. This is the primary result of this calculator.
  7. Absolute Magnitude — shown as a numeric value. This is the primary result of this calculator.
  8. Main Sequence Lifetime — shown as a numeric value. This is the primary result of this calculator.
  9. Apparent Magnitude — shown as a numeric value.
  10. Surface Flux — shown as a numeric value.
  11. Explore the related calculators below if you need deeper analysis or want to approach this topic from a different angle.
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Formula

L = 4πR²σT⁴ (Stefan-Boltzmann Law)

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