Ever wondered exactly how a lot you"d weigh on Mars? Or Jupiter? Here"s the simple math to aid you figure it out.

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Whether you are a scientific research fiction fan, an area enthusiast or one of the millions that have watched astronauts gamboling about the moon"s surface, you might have wondered exactly how a lot you would certainly weigh on various other planets in the solar device.

To sort this out, it first helps to know a tiny Physics 101. 

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Weight is the pressure gravity exerts on a things because of its mass. Mass, around, procedures an object"s inertia, its resistance to being relocated or quit, when it"s in activity. Your mass continues to be continuous across the cosmos (except in certain instances debated in special relativity , yet that is one more story), while your weight changes depending on the gravitational forces acting on you, which differ from planet to earth.

Newton"s Law of Universal Gravitation claims that every little thing that has mass attracts eextremely various other point that has mass, pulling through a pressure (a) directly proportional to the product of the two objects" masses and (b) inversely proportional to the square of the distance separating their centers.

In various other words, although gravity rises linearly as objects prosper more huge, it decreases exponentially as the distance between them rises (a phenomenon recognized as an inverse-square law). When calculating surconfront gravity, that distance describes the space separating you (on the surface) from the planet"s center of mass. This implies that a planet"s size actually has actually a higher relative affect on its gravity and also on your weight on its surface than does its mass.

Written as a formula, Newton"s gravitation law looks somepoint favor this:

F = G((Mm)/r2)


F is the gravitational pressure between 2 objects,G is the Gravitational Constant (6.674×10-11 Newtons x meters2 / kilograms2),M is the planet"s mass (kg),m is your mass (kg), andr is the distance (m) between the centers of the 2 masses (the planet"s radius).

Without acquiring too bogged dvery own in the math, we can view that this leads to a surpclimbing result. Take the the majority of huge planet in the solar mechanism, Jupiter, which tips the scales at 316 times the mass of the Earth. You might imagine you would weigh 316 times as a lot there as here. However, because Jupiter"s radius balloons to approximately 11 times as big as Earth"s, its gravitational force drops off by a aspect of 1/112 at its surconfront (assuming you could uncover a method to stand also on gas clouds).

However before, that does not mean that the propercent of Jupiter"s gravity to Earth"s is 316 / 112. To calculate the proportion between Earth"s surchallenge gravity and also that of any type of other celestial body, you should compute them individually utilizing the formula over, and also then divide the preferred planet"s gravitational force by Earth"s. We will spare you the work:

Mercury: 0.38Venus: 0.91Earth: 1.00Mars: 0.38Jupiter: 2.34Saturn: 1.06Uranus: 0.92Neptune: 1.19Pluto: 0.06

Due to the fact that weight = mass x surface gravity, multiplying your weight on Planet by the numbers above will offer you your weight on the surchallenge of each earth. If you weigh 150 pounds (68 kg.) on Earth, you would certainly weigh 351 lbs. (159 kg.) on Jupiter, 57 lbs. (26 kg.) on Mars and a mere 9 lbs. (4 kg.) on the dwarf world of Pluto.


Keep in mind that Mercury and also Mars have the exact same proportional gravity, even though Mars is virtually twice as massive as Mercury. Mars" superior size, 1.4 times the diameter of Mercury, trumps the effect of its additional mass because of the inverse-square connection between gravity and distance.

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Uranus and Venus current an even even more striking instance of this phenomenon: Although Uranus lugs about 17.8 times the mass of Venus, its 4.2- times-bigger diameter still neentrances the difference in proportional surconfront gravity.