| % | quantity | |
| 1 (unit) | quantity | |
| A (ampere) | current | |
| acre | area | |
| American Wire Gauge Area | area | use -1, -2 for 00, 000; non-linear |
| American Wire Gauge Dia | length | use -1, -2 for 00, 000; non-linear |
| amp | current | |
| amp hour | charge | |
| ampere | current | |
| amu (atomic mass) | mass | |
| angstrom | length | |
| APR (annual % rate) | interest rate | based on continuous compounding |
| arc min (minute) | angle | |
| arc minute | angle | |
| arc sec (second) | angle | |
| arc second | angle | |
| are | area | |
| astronomical unit | length | |
| atm (atmosphere) | pressure | |
| atmosphere | pressure | |
| atomic mass unit | mass | |
| au (astronomical unit) | length | |
| avogadro | size of a mol | |
| AWG Area (American Wire Gauge) | area | use -1, -2 for 00, 000; non-linear |
| AWG Dia (American Wire Gauge) | length | use -1, -2 for 00, 000; non-linear |
| B (byte) | data | |
| bakers dozen | quantity | |
| bar | pressure | |
| barn | area | particle physics |
| barrel | volume | |
| bbl (barrel) | volume | |
| Beaufort wind | velocity | wind speed, non-linear |
| becquerel | radioactivity | |
| bell | time | naval definition |
| bit | data | |
| board feet | volume | |
| board foot | volume | |
| boiler horsepower | power | |
| bps (bits / second) | data transfer | |
| Bq (becquerel) | radioactivity | |
| British Std Wire Gauge | length | use -1, -2 for 2/0, 3/0; non-linear |
| British thermal unit | energy | |
| Btu (British thermal unit) | energy | |
| bushel | volume | |
| byte | data | |
| C (Celsius) | temperature | non-linear |
| C deg (Celsius degree) | temp. diff. | |
| cable | length | |
| cal (calorie) | energy | |
| calendar year | time | |
| caliber | length | bullet sizes |
| calorie | energy | |
| calorie food | energy | |
| candela | lum. intens. | |
| Cape foot | length | |
| carat | mass | |
| carat gold | concentration | gold purity |
| cc (cubic centimeter) | volume | |
| cd (candela) | lum. intens. | |
| Celsius | temperature | non-linear |
| Celsius degree | temp. diff. | |
| centigram | mass | |
| centigray | radiation dose | |
| centiliter | volume | |
| centimeter | length | |
| centipoise | dyn viscosity | |
| centistokes | kin viscosity | |
| centuries | time | |
| century | time | |
| cfm (cu ft/minute) | fluid flow | |
| cfs (cu ft/second) | fluid flow | |
| chain | length | |
| chain US survey | length | |
| circle | angle | |
| circular inch | area | area of 1 inch circle |
| circular mil | area | area of 1 mil circle |
| cm (centimeter) | length | |
| cord | volume | |
| coulomb | charge | |
| cP (centipoise) | dyn viscosity | |
| cSt (centistokes) | kin viscosity | |
| ct (carat) | mass | |
| cubic centimeter | volume | |
| cubit | length | biblical unit |
| cup | volume | |
| curie | radioactivity | |
| Da (dalton) | mass | atomic mass |
| dalton | mass | atomic mass |
| darcy | permeability | |
| day | time | |
| decade | time | |
| decare | area | |
| decibar | pressure | |
| decigram | mass | |
| deciliter | volume | |
| decimeter | length | |
| deg (degree) | angle | |
| deg C (Celsius) | temperature | non-linear |
| deg F (Fahrenheit) | temperature | non-linear |
| deg K (Kelvin) | temperature | |
| deg R (Rankine) | temperature | |
| degree | angle | |
| degree Celsius | temperature | non-linear |
| degree Fahrenheit | temperature | non-linear |
| degree Kelvin | temperature | |
| dekagram | mass | |
| dekaliter | volume | |
| dekameter | length | |
| dekanewton | force | |
| dekare | area | |
| density air | density | at STP |
| density aluminum | density | |
| density brass | density | 80Cu-20Zn |
| density copper | density | |
| density Hg | density | |
| density iron | density | cast iron |
| density nickel | density | |
| density nylon | density | |
| density polycarbonate | density | |
| density sea water | density | |
| density silver | density | |
| density steel | density | carbon steel |
| density tin | density | |
| density titanium | density | |
| density water | density | |
| density zinc | density | |
| diopter | optical power | American spelling |
| dioptre | optical power | British spelling |
| dm (decimeter) | length | |
| doz (dozen) | quantity | |
| dozen | quantity | |
| dram | mass | avoirdupois |
| drill bit size | length | American drill bit gauge, non-linear |
| dyne | force | |
| electronvolt | energy | |
| erg | energy | |
| eV (electronvolt) | energy | |
| F (Fahrenheit) | temperature | non-linear |
| F deg (Fahrenheit deg.) | temp. diff. | |
| Fahrenheit | temperature | non-linear |
| Fahrenheit degree | temp. diff. | |
| farad | capacitance | |
| fathom | length | |
| feet | length | |
| feet of water | pressure | fresh water |
| fermi | length | nuclear sizes |
| fifth | volume | alcohol |
| fl oz (fluid ounce) | volume | US |
| fluid dram | volume | US |
| fluid ounce | volume | US |
| foot | length | |
| foot of head | pressure | fresh water |
| foot US survey | length | |
| football field | length | |
| footcandle | illuminance | |
| footlambert | luminance | |
| fortnight | time | |
| ft (foot) | length | |
| ft H2O (feet of H20) | pressure | fresh water |
| ft hd (foot of head) | pressure | fresh water |
| ft water (feet of H2O) | pressure | fresh water |
| furlong | length | |
| g (gram) | mass | |
| gal (gallon) | volume | US liquid |
| galileo | acceleration | |
| gallon | volume | US liquid |
| gallon imperial | volume | |
| gas constant (R) | constant | |
| gauss | flux density | |
| GB (gigabyte) | data | based on power of 2 |
| GB SI std (gigabyte) | data | based on power of 10 |
| GHz (gigahertz) | frequency | |
| GiB (gibibyte) | data | |
| gibibyte | data | |
| gigabit | data | based on power of 10 |
| gigabyte | data | based on power of 2 |
| gigabyte SI std | data | based on power of 10 |
| gigagram | mass | |
| gigahertz | frequency | |
| gigajoule | energy | |
| gigapascal | pressure | |
| gigawatt | power | |
| GPa (gigapascal) | pressure | |
| gph (gallons/hour) | fluid flow | |
| gpm (gallons/minute) | fluid flow | |
| gradian | angle | |
| grain | mass | |
| gram | mass | |
| gram force | force | |
| gram mole | molecular qty | |
| gravity | acceleration | |
| gravity constant | constant | |
| gray | radiation dose | |
| great gross | quantity | |
| gross | quantity | |
| GW (gigawatt) | power | |
| Gy (gray) | radiation dose | |
| H (henry) | inductance | |
| hand | length | |
| hartree | energy | |
| hat trick | quantity | sports |
| hectare | area | |
| hectogram | mass | |
| hectoliter | volume | |
| hectometer | length | |
| hectopascal | pressure | |
| hemisphere | solid angle | |
| henry | inductance | |
| hertz | frequency | |
| hogshead beer | volume | |
| hogshead wine | volume | |
| homestead | area | |
| horsepower | power | |
| hour | time | |
| hp (horsepower) | power | |
| hPa (hectopascal) | pressure | |
| hr (hour) | time | |
| hundredweight long | mass | Imperial |
| hundredweight short | mass | US & Canada |
| Hz (hertz) | frequency | |
| imp fl oz (imperial fluid ounce) | volume | |
| imp gal (imperial gallon) | volume | |
| imp pt (imperial pint) | volume | |
| imp qt (imperial quart) | volume | |
| imperial fluid dram | volume | |
| imperial fluid ounce | volume | |
| imperial gallon | volume | |
| imperial minim | volume | |
| imperial pint | volume | |
| imperial quart | volume | |
| in (inch) | length | |
| in H2O (inch of H2O) | pressure | fresh water |
| in Hg (inch of Hg) | pressure | |
| in water (inch of H2O) | pressure | fresh water |
| inch | length | |
| inch of Hg | pressure | |
| inch of water | pressure | fresh water |
| inches | length | |
| J (joule) | energy | |
| joule | energy | |
| K (Kelvin) | temperature | |
| kA (kiloampere) | current | |
| karat | concentration | gold purity |
| kB (kilobyte) | data | based on power of 2 |
| kB SI std (kilobyte) | data | based on power of 10 |
| kbps (kilobits / sec.) | data transfer | based on power of 10 |
| kcal (kilocalorie) | energy | |
| keg | volume | beer |
| Kelvin | temperature | |
| key | mass | drug slang |
| kg (kilogram) | mass | |
| kg force (kilogram f) | force | |
| kgf (kilogram force) | force | |
| kHz (kilohertz) | frequency | |
| KiB (kibibyte) | data | |
| kibibyte | data | |
| kiloampere | current | |
| kilobar | pressure | |
| kilobit | data | based on power of 10 |
| kilobyte | data | based on power of 2 |
| kilobyte SI std | data | based on power of 10 |
| kilocalorie | energy | |
| kilogram | mass | |
| kilogram force | force | |
| kilohertz | frequency | |
| kilohm | resistance | |
| kilojoule | energy | |
| kiloliter | volume | |
| kilometer | length | |
| kilomole | molecular qty | |
| kilonewton | force | |
| kiloparsec | length | |
| kilopascal | pressure | |
| kilopond | force | |
| kiloton | mass | non-metric |
| kilotonne | mass | metric |
| kilovolt | potential | |
| kilowatt | power | |
| kilowatt hour | energy | |
| kJ (kilojoule) | energy | |
| kl (kiloliter) | volume | |
| km (kilometer) | length | |
| kmol (kilomole) | molecular qty | |
| kN (kilonewton) | force | |
| knot | velocity | |
| kp (kilopond) | force | |
| kPa (kilopascal) | pressure | |
| kph (kilometers/hour) | velocity | |
| ksi (1000 lb / sq inch) | pressure | |
| kt (knot) | velocity | |
| kV (kilovolt) | potential | |
| kW (kilowatt) | power | |
| kWh (kilowatt-hour) | energy | |
| l (liter) | volume | |
| lambert | luminance | |
| lb (pound) | mass | avoirdupois |
| lb troy (pound troy) | mass | |
| lbf (pound force) | force | avoirdupois |
| lbm (pound) | mass | avoirdupois |
| lbmol (pound mole) | molecular qty | |
| LD (lunar distance) | length | astronomical |
| league | length | |
| lid | mass | drug slang |
| light minute | length | |
| light second | length | |
| light speed | velocity | |
| light year | length | |
| link | length | |
| liter | volume | |
| liter per 100 km | fuel consumpt. | non-linear |
| litre | volume | |
| lm (lumen) | luminous flux | |
| long ton | mass | Imperial |
| lpm (liter/min) | fluid flow | |
| lumen | luminous flux | |
| lunar distance | length | astronomical distance |
| lux | illuminance | |
| m (meter) | length | |
| m H2O (meter of H2O) | pressure | fresh water |
| m water (meter of H2O) | pressure | fresh water |
| mA (milliampere) | current | |
| mach | velocity | speed sound at STP |
| magnum | volume | alcohol |
| mAh (milliamp hour) | charge | |
| man hour | scheduling | |
| man month | scheduling | |
| man week | scheduling | |
| man year | scheduling | |
| marathon | length | |
| maxwell | magn. flux | |
| MB (megabyte) | data | based on power of 2 |
| MB SI std (megabyte) | data | based on power of 10 |
| mbar (millibar) | pressure | |
| MBH (1000 Btu/hr) | power | |
| mebibyte | data | |
| megabar | pressure | |
| megabit | data | based on power of 10 |
| megabyte | data | based on power of 2 |
| megabyte SI std | data | based on power of 10 |
| megagram | mass | |
| megahertz | frequency | |
| megajoule | energy | |
| megaliter | volume | |
| megameter | length | |
| meganewton | force | |
| megaparsec | length | |
| megapascal | pressure | |
| megawatt | power | |
| meter | length | |
| meter of water | pressure | fresh water |
| metercandle | illuminance | |
| metre | length | |
| metric horsepower | power | |
| metric ton | mass | |
| mg (milligram) | mass | |
| mH (millihenry) | inductance | |
| MHz (megahertz) | frequency | |
| mi (mile) | length | statute mile |
| MiB (mebibyte) | data | |
| microampere | current | |
| microbar | pressure | |
| microfarad | capacitance | |
| microgram | mass | |
| microhenry | inductance | |
| microhm | resistance | |
| microinch | length | |
| microinches | length | |
| microliter | volume | |
| micrometer | length | |
| micron | length | |
| micron of Hg | pressure | |
| microsecond | time | |
| mil | length | |
| mil Swedish | length | |
| mile | length | statute mile |
| mile US survey | length | |
| mill | quantity | |
| millennia | time | |
| millennium | time | |
| milliamp | current | |
| milliamp hour | charge | |
| milliampere | current | |
| millibar | pressure | |
| millicurie | radioactivity | |
| millidarcy | permeability | |
| millifarad | capacitance | |
| milligram | mass | |
| millihenry | inductance | |
| millihertz | frequency | |
| millijoule | energy | |
| millilambert | luminance | |
| milliliter | volume | |
| millimeter | length | |
| millimeter of Hg | pressure | |
| millinewton | force | |
| milliohm | resistance | |
| millirem | radiation dose | roentgen equiv mammal |
| millisecond | time | |
| millisievert | radiation dose | equiv. dose |
| millivolt | potential | |
| milliwatt | power | |
| min (minute) | time | |
| min arc (minute) | angle | |
| minim | volume | US |
| minute | time | |
| minute arc | angle | |
| mJ (millijoule) | energy | |
| ml (milliliter) | volume | |
| mm (millimeter) | length | |
| mm Hg | pressure | |
| mol (mole) | molecular qty | gram mole |
| mole | molecular qty | gram mole |
| month | time | |
| MPa (megapascal) | pressure | |
| mpg (miles/gallon) | fuel consumpt. | |
| mpg imp (miles/gallon imp) | fuel consumpt. | |
| mph (miles/hour) | velocity | |
| ms (millisecond) | time | |
| mV (millivolt) | potential | |
| MW (megawatt) | power | |
| N (newton) | force | |
| nanofarad | capacitance | |
| nanometer | length | |
| nanosecond | time | |
| nautical mile | length | |
| newton | force | |
| ngaan | area | Thai |
| nm (nanometer) | length | |
| nmi (nautical mile) | length | |
| ns (nanosecond) | time | |
| ohm | resistance | |
| ounce | mass | avoirdupois |
| ounce fluid | volume | US |
| ounce force | force | |
| ounce troy | mass | |
| oz (ounce) | mass | avoirdupois |
| oz troy (ounce troy) | mass | |
| ozf (ounce force) | force | |
| P (poise) | dyn viscosity | |
| Pa (pascal) | pressure | |
| pair | quantity | |
| parsec | length | |
| parts per billion | concentration | |
| parts per million | concentration | |
| parts per trillion | concentration | |
| pascal | pressure | |
| PB (petabyte) | data | based on power of 2 |
| PB SI std (petabyte) | data | based on power of 10 |
| pdl (poundal) | force | Imperial force |
| pebibyte | data | |
| peck | volume | |
| pennyweight | mass | |
| percent | quantity | |
| petabyte | data | based on power of 2 |
| petabyte SI std | data | based on power of 10 |
| pi | quantity | |
| PiB (pebibyte) | data | |
| pica | length | |
| picofarad | capacitance | |
| pint | volume | US liquid |
| pint imperial | volume | |
| Planck constant | constant | |
| point | length | desktop publishing point |
| poise | dyn viscosity | |
| pound | mass | avoirdupois |
| pound force | force | avoirdupois |
| pound mole | molecular qty | |
| pound per sq inch | pressure | |
| pound troy | mass | |
| poundal | force | Imperial force |
| ppb (parts per billion) | concentration | |
| ppm (parts per million) | concentration | |
| ppt (parts per trillion) | concentration | |
| proof | concentration | alcohol content |
| psi (pound / sq inch) | pressure | |
| pt (pint) | volume | US liquid |
| qt (quart) | volume | US liquid |
| quadrant | angle | |
| quart | volume | US liquid |
| quart imperial | volume | |
| R (Rankine) | temperature | |
| rack unit | length | computing |
| rad (radian) | angle | |
| rad. abs. dose | radiation dose | commonly rad |
| radian | angle | |
| rai | area | Thai |
| Rankine | temperature | |
| ream | quantity | |
| rem | radiation dose | roentgen equiv mammal |
| rev (revolution) | angle | |
| revolution | angle | |
| right angle | angle | |
| ring size | length | US size, circum., non-linear |
| rod | length | |
| roentgen | radioactivity | |
| rood | area | |
| rpm (rev/min) | rot. velocity | |
| rps (rev/sec) | rot. velocity | |
| RSI (R-value SI) | thermal resistance | |
| Rvalue | thermal resistance | |
| Rvalue SI | thermal resistance | |
| Ry (Rydberg unit) | energy | |
| Rydberg unit | energy | |
| s (second) | time | |
| sccm (std cc/min) | gas flow | pressure * flow |
| sccs (std cc/sec) | gas flow | pressure * flow |
| scfh (std cu ft/hour) | gas flow | pressure * flow |
| scfm (std cu ft/min) | gas flow | pressure * flow |
| score | quantity | |
| screw size | length | Unified diameters, non-linear |
| sec (second) | time | |
| sec arc (second) | angle | |
| second | time | |
| second arc | angle | |
| section | area | |
| shoe size mens | length | US sizes, non-linear |
| shoe size womens | length | US sizes, non-linear |
| shot | volume | |
| siemens | conductance | |
| sievert | radiation dose | equiv. dose |
| slph (std liter/hour) | gas flow | pressure * flow |
| slpm (std liter/min) | gas flow | pressure * flow |
| slug | mass | |
| smoot | length | |
| solar mass | mass | |
| sphere | solid angle | |
| square perch | area | |
| sr (steradian) | solid angle | |
| St (stokes) | kin viscosity | |
| standard gauge (steel) | length | Manufacturers Std. Gauge, non-linear |
| steradian | solid angle | |
| stokes | kin viscosity | |
| stone | mass | |
| stremma | area | |
| Sv (sievert) | radiation dose | equiv. dose |
| T (tesla) | flux density | |
| tablespoon | volume | |
| TB (terabyte) | data | based on power of 2 |
| TB SI std (terabyte) | data | based on power of 10 |
| tbsp (tablespoon) | volume | |
| teaspoon | volume | |
| tebibyte | data | |
| terabit | data | based on power of 10 |
| terabyte | data | based on power of 2 |
| terabyte SI std | data | based on power of 10 |
| teragram | mass | |
| tesla | flux density | |
| therm | energy | |
| thermie | energy | |
| TiB (tebibyte) | data | |
| ton | mass | non-metric |
| ton force | force | |
| ton imperial | mass | |
| ton refrigeration | power | |
| ton TNT | energy | |
| tonne | mass | metric |
| tonne coal equivalent | energy | |
| tonne force | force | metric |
| tonne oil equivalent | energy | |
| torr | pressure | |
| township | area | |
| tsp (teaspoon) | volume | |
| turn | angle | |
| unit | quantity | |
| V (volt) | potential | |
| versta | length | Russian unit |
| volt | potential | |
| W (watt) | power | |
| watch | time | |
| watches | time | |
| watt | power | |
| Wb (weber) | magn. flux | |
| weber | magn. flux | |
| week | time | |
| wine bottle | volume | |
| wk (week) | time | |
| yard | length | |
| yd (yard) | length | |
| year | time | |
| yr (year) | time | |
| zinc gauge | length | sheet metal thickness, non-linear |