Mass of Uranus
| Value | 14.5356819932 Mearth (8.681 × 10²⁵ kg) |
| Status | Measured: ± 3.2 × 10⁻⁴ Mearth (2.2 × 10⁻⁵ relative), standard uncertainty |
| Source | NASA planetary fact sheet; GM from Voyager 2 tracking and satellite orbits, divided by CODATA 2022 G |
| Categories | AstronomicalPlanets |
| Unit | Value |
|---|---|
| Earth mass | 14.535682 Mearth |
28 more mass units
| unified atomic mass unit (dalton) | 5.2278204e+52 u |
| picogram | 8.6810000e+40 pg |
| nanogram | 8.6810000e+37 ng |
| microgram | 8.6810000e+34 μg |
| milligram | 8.6810000e+31 mg |
| centigram | 8.6810000e+30 cg |
| grain | 1.3396830e+30 gr |
| metric carat | 4.3405000e+29 ct |
| gram | 8.6810000e+28 g |
| pennyweight | 5.5820126e+28 dwt |
| dram | 4.8994122e+28 dr |
| ounce | 3.0621326e+27 oz |
| troy ounce | 2.7910063e+27 oz t |
| troy pound | 2.3258386e+26 lb t |
| pound | 1.9138329e+26 lb |
| kilogram | 8.6810000e+25 kg |
| stone | 1.3670235e+25 st |
| slug | 5.9483745e+24 slug |
| US hundredweight | 1.9138329e+24 cwt |
| UK long hundredweight | 1.7087794e+24 cwt (UK) |
| quintal | 8.6810000e+23 q |
| US short ton | 9.5691645e+22 ton |
| metric tonne | 8.6810000e+22 t |
| UK long ton | 8.5438969e+22 long ton |
| kilotonne | 8.6810000e+19 kt |
| megatonne | 8.6810000e+16 Mt |
| gigatonne | 86,810,000,000,000 Gt |
| solar mass | 0.000043657998 Msun |
Learning zone
William Herschel found Uranus in 1781 with a homemade reflector, the first planet discovered rather than inherited from antiquity, and doubled the known size of the solar system at a stroke. Its mass was later pinned down from the motions of its moons, and Voyager 2's single 1986 flyby remains the only close visit.
The mass is best known for what it could not explain: the planet kept straying from its predicted path, and Le Verrier and Adams independently used the residuals to compute where an unseen perturber must be. Galle found Neptune within a degree of Le Verrier's position in 1846: the most spectacular vindication celestial mechanics has ever produced, and the same technique astronomers now use to infer unseen planets around other stars.
Cite this page
formula.expert. (2026, October 16). Mass of Uranus. https://formula.expert/constants/uranus-mass