Surface Gravity of Jupiter
| Value | 24.79 m/s² |
| Status | Measured: ± 0.01 m/s² (0.0004 relative) |
| Source | NASA NSSDC Planetary Fact Sheet, Jupiter (surface gravity, eq., 1 bar) |
| Categories | Astronomicalsolar-systemplanets |
| microgal | 2,479,000,000 μGal |
| milligal | 2,479,000 mGal |
| millimeter per second squared | 24,790 mm/s² |
| centimeter per second squared | 2,479 cm/s² |
| gal | 2,479 Gal |
| inch per second squared | 975.98425 in/s² |
| kilometer per hour per second | 89.244 km/h/s |
| foot per second squared | 81.332021 ft/s² |
| mile per hour per second | 55.453651 mph/s |
| meter per second squared | 24.79 m/s² |
| standard gravity | 2.5278765 g |
Learning zone
With no surface to stand on, a gas giant's "surface gravity" is a convention: this is the gravitational acceleration at the one-bar pressure level on the equator, the same reference where the radius is quoted, and it excludes the planet's rotation. Include the centrifugal effect of the 9.9-hour spin and the effective pull an equatorial observer would feel drops to 23.12 m/s² — Jupiter's rotation refunds seven per cent of its gravity at the equator, against Earth's 0.3 per cent.
Even 2.5 g is modest for 318 Earth masses; it stays that low only because the mass is spread through eleven Earth-diameters of hydrogen. The deep interior is another matter. Galileo's atmospheric probe decelerated at up to 228 g entering in 1995, and anything descending never lands: pressure and temperature climb until the hydrogen itself turns liquid, then metallic, with no boundary to stand on anywhere.