About Units
Acceptable Units
The following units are acceptable for use in the "standardized result" column of your final submission.
| Quantity, Synonyms or Related Quantities |
SI Unit, Symbol |
Other Units, Symbol w/Notes |
|---|---|---|
| Acceleration |
m/s2 | g (multiples of 9.8 m/s2) |
| Angular Velocity (Angular Speed, Rate of Rotation) |
rad/s | rpm |
| Area |
m2 | - |
| Density |
kg/m3 | molecule/m3 |
| Electric Current (Amperage) |
amp, A (a.k.a. ampère) |
- |
| Electric Field |
V/m or N/C (identical units) |
- |
| Electric Potential (Electromotive Force, Potential Difference, Voltage) |
volt, V | - |
| Electrical Resisitivity (Reciprocal of Electrical Conductivity) |
Ω·m | - |
| Energy (Energy Density) |
joule, J | electron volt, eV J/kg (energy density) |
| Force (Lift, Tension, Weight, etc.) |
newton, N | - |
| Friction (Coefficient of Friction) |
- | - |
| Frequency |
hertz, Hz | - |
| Length (Altitude, Diameter, Distance, Size, Thickness, Wavelength) |
meter, m | light-year |
| Magnetic Field (Magnetic Flux Density, Magnetic Induction) |
tesla, T | Wb/m2 or N/Am (identical to tesla) |
| Mass |
kilogram, kg | solar masses atomic mass unit, amu |
| Money (Cost, Earnings, Income, Price, Salary, Worth) |
$US | $US/g, $US/kg, $US/L, $US/m3, $US/J, etc. |
| Number |
- | - |
| Power (Power Density) |
watt, W | W/m2 (power density) |
| Pressure |
pascal, Pa | atmosphere, atm |
| Refraction (Index of Refraction, Refractive Index) |
- | - |
| Temperature |
kelvin, K | degree celsius, °C |
| Time (Age, Half-life, Period) |
second, s | year, yr |
| Velocity (Speed) |
m/s | - |
| Volume |
m3 | liter, L |
Acceptable Prefixes
The following prefixes may be used in conjunction with the acceptable units given above. The use of prefixes is preferred to the use of scientific notation in most cases.
| Multiples | Divisions | ||||
|---|---|---|---|---|---|
| SI Prefix | Symbol | Value | SI Prefix | Symbol | Value |
| kilo | k | 103 | milli | m | 10−3 |
| mega | M | 106 | micro | μ | 10−6 |
| giga | G | 109 | nano | n | 10−9 |
| tera | T | 1012 | pico | p | 10−12 |
| peta | P | 1015 | femto | f | 10−15 |
| exa | E | 1018 | atto | a | 10−18 |
Conversion Resources
Learn to use Google Calculator. Not only does it do conversions, but it can also do computations with mixed units and state the answer with the correct SI unit.