 Units overview
All built-in units and prefixes are listed on this page. You can use the short names as well as the long names of units. To learn more about units, see the page Units.
The units are sorted in the following groups.
On Wikipedia you can find detailed information about each of the units, see the pages on
Physical quantity, SI units, and United States customary units.
Mechanics
Note: The degree character ° can be inserted by pressing <Ctrl+D>.
| Angle |
|---|
| Rad |
| Deg (°) |
| Grad |
| Cycle |
| Time |
|---|
| s (seconds) |
| h (hours) |
| min (minutes) |
| Mass |
|---|
| kg (kilogram) |
| tonne |
| ton |
| gr (grain) |
| dr (dram) |
| oz (ounce) |
| lbm (poundmass) |
| hundredweight |
| cwt (stick) |
| Length |
|---|
| m (meter) |
| inch |
| ft (foot) |
| yd (yard) |
| mi (mile) |
| li (link) |
| rd (rod) |
| ch (chain) |
| Angstrom |
| mil |
|
| Area |
|---|
| m2 (Square meter) = 1 m² |
| sqin (Square inch) |
| sqft (Square foot) |
| sqyd (Square yard) |
| sqmi (Square mile) |
| sqrd (Square rod) |
| sqch (Square chain) |
| sqmil (Square mil) |
| Volume |
|---|
| m3 (Cubic metre) = m³ |
| L (litre) |
| cuin (Cubic inch) |
| cuft (Cubic foot) |
| cuyd (Cubic yard) |
| teaspoon |
| tablespoon |
| Liquid volume |
|---|
| minim |
| fldr (fluiddram) |
| floz (fluidounce) |
| gi (gill) |
| cp (cup) |
| pt (pint) |
| qt (quart) |
| gal (gallon) |
| bbl (beerbarrel) |
| obl (oilbarrel) |
| hogshead |
|
| Derived quantities | Definition |
|---|
| Hz (Hertz) | 1/s |
| N (Newton) | kg·m/s2 |
| lbf (poundforce) | lbm·m/s2 |
| J (Joule) | N·m |
| P (Pascal) | N/m2 |
| Bar | 1·105 Pa |
| psi | lbf/inch2 |
Electricity
| Electricity | Definition |
|---|
| A (Ampere) | |
| C (Coulomb) | s·A |
| W (Watt) | J/s |
| V (Volt) | W/A |
| Ohm (Resistance) | V/A |
| F (Farad) | C/V |
| Wb (Weber) | J/A |
| T (Tesla) | Wb/m2 |
| H (Henry) | Wb/A |
| S (Siemens) | 1/Ohm |
| Derived quantities | Definition |
|---|
| eV (ElectronVolt) | 1.6021765314e-19 J |
Temperature
The degree character ° can be inserted in the Workarea of SpeQ by pressing <Ctrl+D>.
| Temperature | Definition |
|---|
| K (Kelvin) | |
| °C (Celsius) | °C = K - 273.15 |
| °F (Fahrenheit) | °F = (K · 1.8) - 459.67 |
| °R (Rankine) | °R = K · 1.8 |
Molecular
| Molecular | Definition |
|---|
| mol (mole) | |
| kat (Katal) | mol/s |
Light intensity
| Light intensity | Definition |
|---|
| cd (candela) | |
| sr (steradian) | |
| lm (Luminous flux) | cd·sr |
| lux (Illuminance) | lm/m2 |
Radioactivity
| Radioactivity | Definition |
|---|
| Bq (Becquerel) | 1/s |
| Gy (Gray) | J/kg |
| Sv (Sievert) | J/kg |
Digital computing
| Digital computing | Definition |
|---|
| b (bit) | |
| B (byte) | 8 bit |
Prefixes
Prefixes can be used preceding to units. They are used to reduce the number of zeros in numerical values. For example 0.0000025 m can be written as 2.5 μm, which is easier to read. Note that the character μ can be inserted in the Workarea by pressing <Ctrl+U>.
| Prefix | Value |
|---|
| d (deci) | 0.1 |
| c (centi) | 0.01 |
| m (milli) | 0.001 |
| μ (micro) | 10-6 |
| n (nano) | 10-9 |
| p (pico) | 10-12 |
| f (femto) | 10-15 |
| a (atto) | 10-18 |
| z (zepto) | 10-21 |
| y (yocto) | 10-24 |
|
| Prefix | Value |
|---|
| da (deca) | 10 |
| h (hecto) | 100 |
| k (kilo) | 1000 |
| M (mega) | 106 |
| G (giga) | 109 |
| T (tera) | 1012 |
| P (peta) | 1015 |
| E (exa) | 1018 |
| Z (zetta) | 1021 |
| Y (yotta) | 1024 |
|
Binary prefixes
Binary prefixes can be used with the units bit and byte. These prefixes denote powers of 1024 = 210.
You can find more information on binary prefixes on wikipedia, click here.
| Prefix | Value |
|---|
| Ki (kibi) | 1024 |
| Mi (mebi) | 10242 |
| Gi (gibi) | 10243 |
| Ti (tebi) | 10244 |
| Pi (pebi) | 10245 |
| Ei (exbi) | 10246 |
| Zi (zebi) | 10247 |
| Yi (yobi) | 10248 |
Examples
For examples see the page Units.
See Also
Defining units,
Functionstree,
Units
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