Stellar Magnitude Calculator
Calculate the apparent magnitude of a star from its flux relative to a reference star.
How to Use the Stellar Magnitude Calculator
- Enter the measured flux of the star.
- Enter the reference flux.
- Enter the reference magnitude.
- Click Calculate for the apparent magnitude.
Use Cases
- •Photometry in observational astronomy
- •Variable star analysis
- •Astrophysics coursework
Formula
m = m₀ − 2.5 × log₁₀(F / F₀)
Frequently Asked Questions
How accurate is this calculator?
Results are based on standard scientific formulas and are suitable for preliminary estimates.
What units are used?
SI units (metres, kg, seconds) are used unless otherwise noted.
Is it free?
Yes, all calculators are completely free.