Solar Mass to Kilogram Converter

Enter a mass in solar masses to convert to kilograms and Earth masses.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

A solar mass (M☉) is the standard astronomical unit for stellar and galactic mass, equal to the Sun's mass: 1 M☉ ≈ 1.989 × 10³⁰ kg, roughly 333,000 times the mass of Earth. Astronomers use it instead of kilograms because stellar and galactic masses in kilograms would involve unwieldy exponents.

This converter translates a mass given in solar masses into kilograms and Earth masses, letting you compare astronomical figures — a neutron star's mass, a galaxy's total mass, an exoplanet's mass — against everyday or planetary reference points.

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