Earth Masses to Grams (M⊕ to g)

1 Earth mass equals 5.9722×10²⁷ grams exactly.

1 Earth mass = 5.9722×10²⁷ grams

How to convert Earth masses to grams

To convert Earth masses to grams, multiply the number of Earth masses by 5.9722×10²⁷. This factor is exact. To go the other way, multiply grams by 1.674424835×10⁻²⁸ (rounded).

grams = Earth masses × 5.9722×10²⁷

Example: 10 Earth masses = 5.9722×10²⁸ grams.

Approximate value. Standards for the Earth mass varied by place and period, so this converter uses the most commonly cited value. Treat results as estimates, not exact figures.

About these units

Earth Mass (M⊕)

AstronomicalCurrent unitApproximate value

About 5.9722×10²⁴ kg, the mass of the Earth. Used to compare planets.

Earth mass is the mass of our planet taken as a yardstick for others, and the best current estimate is about 5.9722 x 10^24 kg, with an uncertainty near one part in ten thousand. NASA's Earth fact sheet and the International Astronomical Union's recommended value agree with this figure.

No scale can weigh a planet, so the mass is found by dividing the planet's gravitational parameter by Newton's constant G. The parameter itself is known to about two parts in a billion from satellite tracking, but G is known only to roughly two parts in a hundred thousand, so the mass inherits that limit. For this reason astronomers often quote GM or mass ratios instead.

The history begins with Nevil Maskelyne's Schiehallion experiment in Scotland in the 1770s, whose result implied a density about one fifth too low. Henry Cavendish's laboratory torsion balance of 1798 produced a density within about 1 percent of the modern one. Uncertainty fell to about 0.2 percent by the 1890s. About 333,000 Earth masses make one solar mass.

1 Earth mass = 5.9722×10²⁴ kilograms (approximately).

Sources: Wikipedia: Earth mass; NASA Earth Fact Sheet

Gram (g)

Metric (SI)Current unit

One thousandth of a kilogram. The standard unit for food quantities and small objects.

A gram was once defined as a small drop of the natural world. The French National Convention of 1795 set it as the absolute weight of a volume of pure water equal to a cube one hundredth of a metre on each side, a cubic centimetre. The reference temperature was first the melting point of ice and was later changed to the temperature of maximum density of water, about 4 degrees Celsius. The word came into French as gramme, from Late Latin gramma, itself from the Greek for a letter or small mark; in Late Antiquity it meant about one twenty-fourth of an ounce.

The gram was the base unit of mass in the centimetre-gram-second system, but in 1960 the SI took the kilogram as its base unit, which made the gram one thousandth of it. That is why it appears in so many everyday places: it is the standard for non-liquid ingredients in cooking and shopping, and nutrition labels commonly list contents per 100 g. For a sense of scale, a small paper clip or a pen cap weighs about a gram, and a Japanese 1-yen coin is close to exactly that, while a US penny is around 2.5 g.

1 gram = 0.001 kilograms (exactly).

Sources: Wikipedia: Gram; Wikipedia: Kilogram

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