• ' = " foot "
• " = " inch "
• $ (US dollar) = $ (currency; base unit)
• % (percent) = 0.01
• *approx = ""
• *avg = ""
• *exact = ""
• / = replacement for " per "
• A (ampere) = A (electric current; base unit)
• a (atto) = 1E-18 (prefix)
• a = are (area)
• abA = abampere (electric current)
• abamp = abampere (electric current)
• abampere = 10 A (electric current)
• abC = abcoulomb (electric charge)
• abcoulomb = 10 C (electric charge)
• abF = abfarad (capacitance)
• abfarad = 1000000000 F (capacitance)
• abH = abhenry (inductance)
• abhenry = 0.000000001 H (inductance)
• abmho = 1000000000 mho (conductance)
• abohm = 0.000000001 ohm (electric resistance)
• absolute temperature = thermodynamic temperature (thermodynamic temperature)
• absolute viscosity = dynamic viscosity (dynamic viscosity)
• Absorbed Dose
  • gray = J/kg (derived unit)
  • Gy = gray
  • Rad = 0.01 Gy
• absorbed dose = specific energy (specific energy)
• abV = abvolt (electric potential)
• abvolt = 0.00000001 V (electric potential)
• Acceleration
  • acceleration = m/s^2 (category unit)
  • acceleration linear = acceleration
  • freefall = g
  • g (gravitational acceleration) = 9.80665 m/s^2
  • galileo = 0.01 m/s^2
  • gravitational acceleration = g
  • linear acceleration = acceleration
• acceleration = m/s^2 (acceleration; category unit)
• acceleration angular = angular acceleration (angular acceleration)
• acceleration linear = acceleration (acceleration)
• acoustical energy = energy (energy)
• acoustical intensity = heat flux density (heat flux density)
• acoustical power = power (power)
• acre = 4840 yard^2 (area)
• Activity
  • becquerel = 1/s (derived unit)
  • Bq = becquerel
  • Ci = curie
  • curie = 37000000000 Bq
  • rutherford = 1000000 Bq
• activity = frequency (frequency)
• actus (Roman actus) = 116.4 foot (length)
• Ad = angstrom (length)
• admiralty knot = 6080 ft/hour (velocity)
• admittance = conductance (conductance)
• Adsorption
  • adsorption = mol/m^2 (category unit)
  • surface concentration = adsorption
• adsorption = mol/m^2 (adsorption; category unit)
• agate (typography agate) = 7.14285714285714E-02 in (length)
• amount of magnetization = magnetic flux (magnetic flux)
• Amount Of Substance
  • amount of substance = mol (category unit)
  • mol (mole) = mol (base unit)
  • mole = mol
• amount of substance = mol (amount of substance; category unit)
• amp = A (electric current)
• ampere = A (electric current)
• ampere turn = A*turn (magnetic force; derived unit)
• amphora (Greek amphora) = 10.3 gallon (volume)
• AMU (atomic mass unit) = 1.66044E-27 kg*approx (mass)
• angstrom = 0.0000000001 m (length)
• Angular Acceleration
  • acceleration angular = angular acceleration
  • angular acceleration = rad/s^2 (category unit)
  • rotational acceleration = angular acceleration
• angular acceleration = rad/s^2 (angular acceleration; category unit)
• angular impulse = angular momentum (angular momentum)
• Angular Momentum
  • angular impulse = angular momentum
  • angular momentum = N*m*s (category unit)
  • planck (Planck constant) = 6.626196E-34 J*s
• angular momentum = N*m*s (angular momentum; category unit)
• Angular Power
  • angular power = W*rad (category unit)
• angular power = W*rad (angular power; category unit)
• angular speed = angular velocity (angular velocity)
• Angular Velocity
  • angular speed = angular velocity
  • angular velocity = rad/s (category unit)
  • circular frequency = angular velocity
  • rotational frequency = angular velocity
  • rpm (revolutions per minute) = revolution/minute (derived unit)
  • velocity angular = angular velocity
• angular velocity = rad/s (angular velocity; category unit)
• annual = yr (time)
• ap = replacement for "apoth"
• ap = replacement for "apothecary"
• ap dr = dram ap (mass)
• ap dram = dram ap (mass)
• ap gr = grain ap (mass)
• ap grain = grain ap (mass)
• ap lb = pound ap (mass)
• ap oz = oz ap (mass)
• ap pound = pound ap (mass)
• ap scruple = scruple (mass)
• apostilb = cd/pi*m^2 (luminance; derived unit)
• apoth = "ap"
• apothecary = "ap"
• approx = ""
• arc deg = degree (plane angle)
• arc degree = degree (plane angle)
• arc min = arc minute (plane angle)
• arc minute (minute of arc) = 1.66666666666667E-02 arc degree (plane angle)
• arc s (second of arc) = 1.66666666666667E-02 arc minute (plane angle)
• arc sec = arc s (plane angle)
• arc second = arc s (plane angle)
• archin (Russian archin) = 28 in (length)
• are = 100 m^2 (area)
• Area
  • a = are
  • acre = 4840 yard^2
  • are = 100 m^2
  • area = m^2 (category unit)
  • barn (abbreviation b) = 1E-28 m^2
  • cho (Japanese cho) = 2.45 acre
  • circular inch = 0.25 pi*in^2
  • circular mil = 0.00000025 pi*in^2
  • desyatina (Russian desyatina) = 2.7 acre
  • hectare = 100 are
  • homestead = 0.25 mile^2
  • linear displacement = area
  • permeability2 = area
  • rood = 40 rod^2
  • sabin = ft^2 (derived unit)
  • section (of land) = mile^2 (derived unit)
  • square = 100 ft^2
  • surface area = area
  • township = 36 mile^2
  • volume to length = area
• area = m^2 (area; category unit)
• area to volume = wave number (wave number)
• arpentcan = 27.52 mile (length)
• arpentlin = 191.835 ft (length)
• arroba (Mexican arroba) = 26.367 pound (mass)
• arroba oil = oil arroba (volume)
• arroba wine = wine arroba (volume)
• as (Roman as) = 12 uncia (mass)
• assay ton = 29.167 gram (mass)
• astronomical unit = 149597871000 m*approx (length)
• At = ampere turn (magnetic force)
• AT = assay ton (mass)
• at wt = atomic weight (force)
• atm = atmosphere (pressure)
• atmosphere = 101325 Pa (pressure)
• atomic mass = AMU (mass)
• atomic mass unit = AMU (mass)
• atomic weight = AMU*g (force; derived unit)
• atto = 1E-18 (prefix)
• au = astronomical unit (length)
• autumn = 89.6666666666667 day*approx (time)
• avdp = ""
• avg = ""
• avogadro (Avogadro's number) = 6.022169E+23 1/mol*approx (unknown units)
• avoirdupois = ""

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z