{"id":628,"date":"2026-07-19T17:09:21","date_gmt":"2026-07-19T17:09:21","guid":{"rendered":"https:\/\/physicsfundamentalsinfo.com\/blog\/?p=628"},"modified":"2026-07-19T17:09:23","modified_gmt":"2026-07-19T17:09:23","slug":"weight-on-other-planets","status":"publish","type":"post","link":"https:\/\/physicsfundamentalsinfo.com\/blog\/mechanics\/weight-on-other-planets\/","title":{"rendered":"Weight on Other Planets: Moon, Mars & More"},"content":{"rendered":"\n
Definition<\/div>

\nWeight on other planets is the gravitational pull on an object, calculated with the formula weight = mass \u00d7 gravity (W = m \u00d7 g). Your mass stays the same everywhere, but each world’s surface gravity g differs \u2014 1.62 m\/s\u00b2 on the Moon, 3.72 on Mars, 24.79 on Jupiter \u2014 so the same body weighs far more on some planets than others.\n<\/p><\/div>\n

Step onto a bathroom scale on the Moon and the number would drop to about a sixth of what you see at home \u2014 not because you’ve lost anything, but because the Moon pulls on you far more gently than Earth does. Fly to Jupiter’s cloud tops and the same scale would read roughly two and a half times higher. You, unchanged, would be crushingly heavy.<\/p>\n

That single idea \u2014 the you<\/em> stays constant while the pull<\/em> changes \u2014 is what makes weight on other planets one of the most intuitive ways into gravity. Below you’ll find the formula, a full solar-system comparison, worked examples, and the misconceptions that trip almost everyone up.<\/p>\n

What Is Weight on Other Planets?<\/h2>\n

Weight on other planets is the force of gravity acting on a mass at that world’s surface, and it changes because each planet has its own gravitational strength. Weight is a force<\/strong>, measured in newtons (N), not a fixed property you carry around. It is the answer to “how hard is this world pulling me down right now?”<\/p>\n

Mass is the constant. A 70 kg astronaut is 70 kg of matter on Earth, in orbit, on Mars, and adrift between the stars.<\/p>\n

What shifts from place to place is how strongly gravity tugs on that matter \u2014 and that tug is what a scale actually reads. Keeping these two ideas apart is the whole game, which is exactly why the difference between weight and mass<\/a> is worth nailing down first.<\/p>\n

Think of it like this. Your mass is your bank balance; your weight is how heavy that balance feels when someone hands it to you in coins. On the Moon, an unseen cashier hands you the same money in a much lighter bag.<\/p>\n

The Weight on Other Planets Formula<\/h2>\n

Weight on any planet is found by multiplying an object’s mass by that planet’s surface gravity. There is only one equation to learn, and it works for every world in the solar system.<\/p>\n

W = m \u00d7 g<\/div>\n

Every symbol, with its SI unit:<\/p>\n

\n\n\n\n\n\n\n\n
Symbol<\/th>\nQuantity<\/th>\nSI unit<\/th>\n<\/tr>\n<\/thead>\n
W<\/strong><\/td>\nWeight (the gravitational force)<\/td>\nnewton (N)<\/td>\n<\/tr>\n
m<\/strong><\/td>\nMass of the object (never changes)<\/td>\nkilogram (kg)<\/td>\n<\/tr>\n
g<\/strong><\/td>\nSurface gravity (gravitational field strength)<\/td>\nnewton per kilogram (N\/kg), equal to m\/s\u00b2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Here is a detail worth pausing on: g<\/strong> can be read two ways that are numerically identical. It is the gravitational field strength in N\/kg, and it is also the acceleration due to gravity in m\/s\u00b2. On Earth that number is about 9.81 whichever way you read it.<\/p>\n

W = m \u00d7 g is really Newton’s second law (F = m \u00d7 a)<\/a> with gravity supplying the acceleration \u2014 which is why weight is measured in newtons, and why weight is a force<\/a>, not a mass. To skip the arithmetic and compare worlds instantly, drop your mass into our Weight on Other Planets calculator<\/a> and switch between planet presets.<\/p>\n

<\/span>Weight on Other Planets Lab<\/span><\/div>
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