Units, Conversions, and Physical Constants
- Page ID
- 11735
Units
Unit Abbreviation | Unit Name | Quantity | Base Units |
m | Meter | Length | m |
kg | Kilogram | Mass | kg |
Pa | Pascal | Pressure | kg / (ms\(^2\)) |
s | Second | Time | s |
N | Newton | Force | kgm / s\(^2\) |
K | Kelvin | Temperature | K |
Hz | Hertz | Frequency | 1 / s |
rad | Radian | Angle | 1 |
J | Joule | Energy | kgm\(^2\) / s\(^2\) |
W | Watt | Power | kgm\(^2\) / s\(^3\) |
AU or au | Astronomical Unit | Length | See Conversions |
Common Conversions
1m = 39.37 in = 3.281 ft = 1.094 yd
1 rad = 57.30\(^\circ\)
1\(^\circ\) = 0.01745 rad = \(\pi\) / 180
1 Pa = 9.869 x 10\(^{-6}\) atm
1 kg/m\(^3\) = 1000 g/cm\(^3\)
1 AU = 1.495 x 10\(^{8}\) km = 1.495 x 10\(^{11}\) km
1 year (yr) = 3.15 x 10\(^{7}\) s
1 million years (my or myr) = 3.15 x 10\(^{13}\) s
1 day = 86,400 s
1 hour = 3600 s
1 K = -273.15 C = -457.87 F
Physical Constants
Name | Symbol | Value |
Acceleration due to Gravity | g | 9.81 m/s\(^2\) |
Universal Gravitational Constant | G | 6.674 x 10\(^{-11}\) Nm\(^2\)/(kg\(^2\)) |
Speed of Light | c | 2.98 x 10\(^{8}\) m/s |
Mass of the Sun | M\(_{sun}\) | 1.98 x 10\(^{30}\) kg |
Radius of the Sun | R\(_{sun}\) | 695700 km |
*For Planet and Moon Information see the Other Section
Other
Guide to Greek Letters: Greek Alphabet
Power of 10 Prefixes (ex. kilo-): Metric Prefixes
Planetary Physical and Orbital Constants: Planets and Pluto Physical Characteristics
Selected Moon Planetary and Orbital Constants: Moon Physical Data Note: To get M by itself, just divide the GM number by the Gravitational Constant G
Common Formulas, Trigonometric Identities, Derivatives, and Integrals: Mathematical Formulas