The University of Texas at Arlington

The University of Texas at Arlington

The Planetarium at UT Arlington

The Planetarium at UT Arlington

Planetary Weight and Age Calculator

How much do I weigh?

Your weight varies directly with your mass (your mass is how much matter is present in your body) and the mass of the planet you're on. The more mass you have, the more you'll weigh. Also, the more mass the planet has, the more you'll weigh. So what do I weigh on all the planets? Find out below.

How old am I?

Your age in years equals the number of times the Earth has revolved around the Sun while you've been alive. Translating the number of Earth revolutions into revolutions on another planet and converting back to Earth-years gives your age on that planet. Try it out below.








Mercury

Mercury

Mass (kg)3.3 x 1023
Diameter (km)4879.4
Mean density (kg/m3)5420
Escape velocity (m/s)4300
Average distance from Sun0.387 AU (57,909,175 km)
Rotation period (length of day in Earth days)58.65
Revolution period (length of year in Earth days)87.97
Obliquity (tilt of axis degrees)0
Orbit inclination (degrees)7
Orbit eccentricity (deviation from circular)0.206
Mean surface temperature (K)452
Maximum surface temperature (K)700
Minimum surface temperature (K)100
Visual geometric albedo (reflectivity)0.12
Venus

Venus

Mass (kg)4.87 x 1024
Diameter (km)12104
Mean density (kg/m3)5250
Escape velocity (m/s)10400
Average distance from Sun0.723 AU (108,208,930 km)
Rotation period (length of day in Earth days)243.02 (retrograde)
Revolution period (length of year in Earth days)224.7
Obliquity (tilt of axis degrees)178
Orbit inclination (degrees)3.39
Orbit eccentricity (deviation from circular)0.007
Mean surface temperature (K)726
Visual geometric albedo (reflectivity)0.59
Earth

Earth

Mass (kg)5.98 x 1024
Diameter (km)12756
Mean density (kg/m3)5520
Escape velocity (m/s)11200
Average distance from Sun1 AU (149,597,890 km)
Rotation period (length of day in Earth days)1 (23.93 hours)
Revolution period (length of year in Earth days)365.26
Obliquity (tilt of axis degrees)23.4
Orbit inclination (degrees)0
Orbit eccentricity (deviation from circular)0.017
Mean surface temperature (K)281
Mean maximum surface temperature (K)310
Mean minimum surface temperature (K)260
Visual geometric albedo (reflectivity)0.39
Mars

Mars

Mass (kg)6.42 x 1023
Diameter (km)6787
Mean density (kg/m3)3940
Escape velocity (m/s)5000
Average distance from Sun1.524 AU (227,936,640 km)
Rotation period (length of day in Earth days)1.026
Revolution period (length of year in Earth days)686.98
Obliquity (tilt of axis degrees)25
Orbit inclination (degrees)1.85
Orbit eccentricity (deviation from circular)0.093
Maximum surface temperature (K)310
Minimum surface temperature (K)150
Visual geometric albedo (reflectivity)0.15
Jupiter

Jupiter

Mass (kg)1.90 x 1027
Diameter (km)142,800
Mean density (kg/m3)1314
Escape velocity (m/s)59500
Average distance from Sun5.203 AU (778,412,020 km)
Rotation period (length of day in Earth days)0.41 (9.8 Earth hours)
Revolution period (length of year in Earth years)11.86
Obliquity (tilt of axis degrees)3.08
Orbit inclination (degrees)1.3
Orbit eccentricity (deviation from circular)0.048
Mean surface temperature (K)120 (cloud tops)
Visual geometric albedo (reflectivity)0.44
Saturn

Saturn

Mass (kg)5.69 x 1026
Diameter (km)120660
Mean density (kg/m3)690
Escape velocity (m/s)35600
Average distance from Sun9.537 AU (1,426,725,400 km)
Rotation period (length of day in Earth days)0.44 (10.2 Earth hours)
Revolution period (length of year in Earth years)29.46
Obliquity (tilt of axis degrees)26.7
Orbit inclination (degrees)2.49
Orbit eccentricity (deviation from circular)0.056
Mean temperature (K)88 K (1 bar level)
Visual geometric albedo (reflectivity)0.46
Uranus

Uranus

Mass (kg)8.68 x 1025
Diameter (km)51118
Mean density (kg/m3)1290
Escape velocity (m/s)21300
Average distance from Sun19.19 AU (2,870,972,200 km)
Rotation period (length of day in Earth days)0.72 (17.9 Earth hours)(retrograde)
Revolution period (length of year in Earth days)30,685 (84 Earth years)
Obliquity (tilt of axis degrees)97.9
Orbit inclination (degrees)0.77
Orbit eccentricity (deviation from circular)0.047
Mean temperature (K)59
Visual geometric albedo (reflectivity)0.56
Neptune

Neptune

Mass (kg)1.02 x 1026
Diameter (km)49528
Mean density (kg/m3)1640
Escape velocity (m/s)23300
Average distance from Sun30.07 AU (4,498,252,900 km)
Rotation period (length of day in Earth days)0.67 (16 hours)
Revolution period (length of year in Earth days)60,190 (164.8 Earth years)
Obliquity (tilt of axis degrees)29.6
Orbit inclination (degrees)1.77
Orbit eccentricity (deviation from circular)0.009
Mean temperature (K)48
Visual geometric albedo (reflectivity)0.51