Simple. Fast. Useful.

Choose your tool

ASTRONOMY TOOL

Absolute Magnitude from Apparent Magnitude

Online absolute magnitude from apparent magnitude. Idealized astronomical model with displayed units. Seeing, extinction, instrument losses or cosmological effects apply only when explicitly included.

â—‡ Browser only
0 lines · 0 characters
Ready when you are
Your results will appear here.
Copy or download your result below.

Your text stays on this device.

Favorites
Recently used
LESS BUSYWORK, MORE DONE

Three steps. That’s it.

A useful toolkit for text, data, images and calculations.

  1. 01

    Add your input

    Choose a tool, enter values or select a file.

  2. 02

    Make it yours

    Adjust the options and run the action.

  3. 03

    Take the result

    Copy the result or download its file.

absolute magnitude from apparent magnitude calculator online

Use absolute magnitude from apparent magnitude online for apparent mag, distance pc, extinction mag. Idealized astronomical model with displayed units. Seeing, extinction, instrument losses or cosmological effects apply only when explicitly included.

How to use it

Enter apparent mag. Set distance pc, extinction mag. Select Calculate and check the labeled output. Copy or download the JSON result.

Options and example settings

OptionChoices / valueExample default
apparent magMain input. Signed finite values. 10
distance pcOption. Positive values. 100
extinction magOption. Zero or positive values. 0.1

Calculation method

absolute_mag = apparent_mag-5*log10(distance_pc)+5-extinction_mag (^ means exponentiation; trig functions ending in d use degrees).

Worked examples

Apply absolute magnitude from apparent magnitude to the case below, keeping the displayed units and assumptions. Idealized astronomical model with displayed units. Seeing, extinction, instrument losses or cosmological effects apply only when explicitly included.

Absolute Magnitude from Apparent Magnitude — worked case

Settings: distance pc: 100; extinction mag: 0.1

Input:

10

Calculated result for these inputs:

Output:

{
  "absolute_mag": 4.9
}

Choose the right tool

Use telescope calculators for focal lengths and angular scale, magnitude tools for logarithmic brightness relationships, and orbit tools for the specified gravitational model. Check whether a distance is in parsecs, light-years or astronomical units.

Limitations and common mistakes

  • Idealized astronomical model with displayed units. Seeing, extinction, instrument losses or cosmological effects apply only when explicitly included.
  • Use the displayed unit in every field. Ratios and percentages are different inputs; percent fields use values such as 25 rather than 0.25.

Frequently asked questions

How can I use absolute magnitude from apparent magnitude calculator online?

Enter apparent mag. Set distance pc, extinction mag. Select Calculate and check the labeled output. Copy or download the JSON result.

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.

Useful next tools

Explore other tools

Open a tool below, use the search, or choose a category to browse its full collection.