# Apparent Magnitude of Stars Calculator

The Apparent Magnitude of Stars Calculator will calculate the:

1. Apparent magnitude of a star when its illumination (brightness) is known

Calculation Parameters: None of the values can be zero

 🖹 Normal View🗖 Full Page View Calculator Precision (Decimal Places)0123456789101112131415 Illumination of the star (b) lux ∞ Real Number Results∑ Scientific Number Results
 Apparent magnitude of the star (m) m = -2.5 log b - 19m = -2.5 × log() - 19m = -2.5 × - 19m = Illumination of the star (b) lux

Please note that the formula for each calculation along with detailed calculations are available below. As you enter the specific factors of each apparent magnitude of stars calculation, the Apparent Magnitude Of Stars Calculator will automatically calculate the results and update the Physics formula elements with each element of the apparent magnitude of stars calculation. You can then email or print this apparent magnitude of stars calculation as required for later use.

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Please provide a rating, it takes seconds and helps us to keep this resource free for all to use ## Related Physics Chapters with Tutorials

Section 12: Optics

Section 22: Cosmology

Mathematics

## Formula and Calculation

m = -2.5 log b - 19

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