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Apparent vs Absolute Magnitude Calculator

Convert between apparent and absolute magnitude using distance.

Convert between apparent magnitude m and absolute magnitude M of a star using the distance modulus m − M = 5 · log10(d / 10 pc), with d in parsecs.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

pc

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

m − M = 5 · log10(d / 10 pc)

In depth

Convert between apparent magnitude m and absolute magnitude M of a star using the distance modulus m − M = 5 · log10(d / 10 pc), with d in parsecs.