# Planets - Calculate Masses

Calculator for the approximate masses of Sun, Moon, Earth and the planets in kilograms and compared to each other. Kilograms is the SI-unit for mass, for celestial bodies this is, of course, a bit small and so leads to huge numbers. One yottagram (Yg, 10^{24} grams, one septillion grams), equals one exaton (Et, 10^{18} tons, one quintillion tons) is more appropriate to display those masses. The common comparative value for terrestrial planets is Earth mass, for gas giants, it is Jupiter mass and for stars, it is solar mass.

Please enter one value, the other values will be calculated.

Very large and very small numbers will be displayed in e-notation, e.g. 2e+9 for 2*10^{9} and 2e-9 for 2*10^{-9}. If a value is shown as 0 (e.g. mass of the Moon in solar masses), then a higher number of decimal places is required.

Colloquially, the mass is also called weight, which for celestial bodies is plain wrong.

Example: Jupiter has more than 300 times Earth's mass, but less than one thousandth mass of the Sun.

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