# Standard Units of Measurement

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Word | Definition |
---|---|

aam | archaic unit of liquid measure ranging from 37 to 41 gallons of wine |

abampere | unit equivalent to 10 amperes |

abvolt | unit of electrical potential equal to one hundred millionth of a volt |

acre-breadth | old unit of length of 22 yards |

ampere | unit for measuring amount of electrical current |

angstrom | unit of one ten-billionth of a meter |

arpent | unit of land area slightly smaller than an acre |

astronomical unit | unit of distance equal to the distance from the earth to the sun |

bar | unit of pressure of one million dynes per square centimeter |

barleycorn | old unit of length equal to one-third inch |

barn | unit of area measurement of particles equal to 100 square femtometres |

baud | unit of data transmission speed of one signal event per second |

bel | unit of noise intensity equal to ten decibels |

butt | unit of volume equal to two hogsheads or 126 gallons |

calorie | unit of heat or heat-producing value |

candela | unit of luminous intensity |

carat | unit of weight of precious stones equal to 200 milligrams |

centner | old unit of weight equal to about 110 pounds |

chain | unit of length equal to 22 yards |

chaldron | old unit of dry volume equal to between 32 and 72 bushels |

clove | old weight of seven to ten pounds for wool or cheese |

cord | unit of wood equal to 128 cubic feet |

coulomb | unit of electrical charge of one ampere over period of one second |

cubit | unit of length equal to 18 inches |

curie | unit of radioactive decay and intensity |

cusec | unit of liquid flow equal to one cubic foot per second |

dalton | unit of atomic mass |

darcy | unit of permeability of rock to various substances |

dash | non-specific very small unit of measurement used in cooking |

decibel | unit for measuring sound intensity |

denier | unit of yarn fineness |

digit | unit of length equal to 3/4 of an inch |

dioptre | unit of measurement of power of lens or eye |

dol | unit for measuring intensity of pain |

dram | unit of weight equal to 1/16 of an ounce |

dyne | unit of force to accelerate 1 gram to 1 cm per second per second |

elephant | large unit of paper measurement equal to 28 by 23 inches |

ell | old unit of length equal to 45 inches |

em | unit of measuring width of typeface where width of letters equals height |

erg | unit of work measuring force of one dyne applied over one centimeter |

face-cord | unit of wood measurement equal to a stack four by eight feet in volume |

farad | unit measuring electrical capacitance |

fathom | unit of length equal to six feet used to measure depth of water |

fermi | unit of length equal to one quadrillionth of a metre |

fifth | unit of measure of liquor equal to one fifth of a gallon |

firkin | old unit of capacity equal to one quarter of a barrel |

footlambert | unit of luminance of a surface emitting one lumen per square foot |

fresnel | unit of optical frequency equal to one terahertz |

furlong | unit of distance equal to 220 yards |

gal | unit of acceleration of one centimeter per second per second |

gamma | unit of magnetic flux density equal to one nanotesla |

gauss | unit of magnetic flux density equal to 1/10000 tesla |

gilbert | unit of magnetomotive force |

gill | unit of liquid volume equal to one-quarter pint |

grain | unit of weight equal to 1/7000 of a pound |

gray | unit of absorbed dose of ionizing radiation equal to 100 rads |

hand | unit for measuring height of horses equal to 4 inches |

henry | unit of electrical inductance |

hertz | unit of frequency equal to one cycle per second |

hide | old unit of land area equal to 120 acres |

hobbet | measure of two and a half bushels |

hogshead | unit of capacity equal to 63 gallons |

horsepower | unit of power equal to 550 foot-pounds of work per second |

hundredweight | unit of weight of 100 pounds (112 pounds in UK) |

jansky | unit of strength of radio wave emission |

jiffy | unit of time used in computing equal to 1/100 second; any small unit of time |

joule | unit of work done by force of one newton over distance of one meter |

karat | unit of fineness of gold equal to 1/24 part of pure gold |

kelvin | unit of temperature based on absolute zero, equal to 1 degree Celsius |

kilderkin | old unit of capacity equal to 1/2 barrel or 18 gallons |

kilobase | unit of measure of length of nucleic acid chain equal to 1000 base pairs |

kip | unit of weight equivalent to 1000 pounds |

lambert | unit of brightness of light |

langley | unit of solar radiation |

league | unit of distance of between 2.4 and 4.6 miles |

link | unit of length used by surveyors, equal to 7.92 inches |

lumen | unit of luminous flux |

lux | unit of illumination equal to one lumen per square meter |

magneton | unit of the quantized magnetic moment of a particle |

maxwell | unit of magnetic flux |

mecate | old Mexican measure of about one-tenth of an acre |

megadeath | unit of fatality equal to one million deaths |

mho | unit of electrical conductance |

mil | unit of 1/1000 inch used for measuring thickness of wire |

minim | unit of liquid volume equal to 1/480 fluid ounces |

mnemon | unit of memory, largely hypothetical |

mole | unit of substance equal to number of atoms as 12 grams of carbon-12 |

morgan | unit of inferred distance between genes on a chromosome |

morgen | unit of land area slightly more than two acres |

mutchkin | old unit of liquid measurement equal to 3/4 of an imperial pint |

nail | old measure of two and a quarter inches |

neper | unit for expressing ratio of two currents or voltages |

newton | unit of force that accelerates 1 kilogram to 1 meter / second / second |

oersted | unit of magnetic field strength |

ohm | unit of electrical resistance of circuits |

osmol | unit of osmotic pressure |

palm | unit of length equivalent to width or length of the hand |

parsec | unit of interstellar distance equal to 3.26 light-years |

pascal | unit of pressure equal to one newton per square meter |

peck | unit of dry measure equal to 8 quarts |

pennyweight | unit of troy weight equal to 24 grains |

phon | unit of loudness of sound as heard by listeners |

photon | unit of brightness of light as received at the retina |

pica | unit of typeface equal to about 1/6 of an inch |

pipe | unit of liquid capacity equal to two hogsheads |

pitch | unit of typeface equal to number of characters per inch |

point | unit of typeface equal to 1/72 of an inch |

poise | unit of viscosity of liquids |

pole | unit of area equal to a square rod |

pottle | unit of liquid measurement of two quarts, or one-half gallon |

poundal | unit of force that accelerates 1 pound to 1 foot / second / second |

probit | unit of measurement of statistical probability |

quad | unit of energy equal to one quadrillion British thermal units |

quarter | unit of weight equal to 28 pounds |

quintal | unit of weight equal to 100 kilograms |

quire | unit of 24 sheets of paper |

rad | unit of absorbed dose of ionizing radiation |

radian | unit of plane angular measurement, approximately 57.3 degrees |

rod | unit of length equal to 1/320 of a mile |

roentgen | unit of x-radiation or gamma radiation |

rood | old unit of land area equal to 1/4 acre |

rundlet | old liquid measure equal to about 15 gallons |

rutherford | unit of radioactive decay equal to 1 million disintegrations per second |

sabin | unit of acoustic absorption of one square foot of a perfect absorber |

scruple | unit of weight used by apothecaries equal to 1/24 of an ounce |

shake | unit of one hundred millionth of a second used to measure nuclear processes |

siemens | unit of electrical conductance equivalent to one ampere per volt |

slug | unit of gravitational mass of approximately 32.174 pounds |

sone | unit of loudness on a scale based on subjective or perceived loudness |

span | unit of distance equal to handspread or nine inches |

stack | old unit of measure for firewood equal to 108 cubic feet |

stone | unit of weight equal to 14 pounds |

svedberg | unit of time used to measure sedimentation velocity |

tesla | unit of magnetic flux density equal to one weber per square meter |

tex | unit of measurement of fineness of fibres and yarn |

therblig | unit of work for quantifying industrial operations |

therm | unit of quantity of heat equal to 100,000 British thermal units |

thirdendeal | old liquid measure of three pints; one-third of anything |

tod | old unit of weight of wool equal to 28 pounds |

tog | unit of measurement for insulation properties of fabric |

ton | unit of cooling power equal to 12,000 BTU per hour |

torr | unit of pressure equal to 1/760 of standard atmospheric pressure |

tun | unit of liquid capacity of 252 gallons |

vara | unit of linear measure of between 33 and 43 inches |

verst | unit of distance equal to approximately 2/3 of a mile |

virgate | old unit of land area usually equal to 30 acres or 1/4 hide |

volt | unit of electrical potential difference and electromotive force |

watt | unit of power equal to one joule per second |

weber | unit of magnetic flux equal to 100 million maxwells |

wey | old measure for dry goods usually equal to 40 bushels |

yardland | unit of land area equal to 30 acres |

yrneh | unit of reciprocal inductance |

zolotnik | old Russian unit of weight equal to 1/6 of an ounce |