Below are the dimensions in which Fathom's units live. All the units in a given dimension are compatible, and Fathom can convert between them (except for the Important Constants). Some conversions are given. Each unit lists the short form, the long form singular, the long form plural, and then other allowed forms. You can combine units in any way you want.
Important Constants
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m, meter, meters
cm, centimeter, centimeters
1 cm = 0.01 m
mm, millimeter, millimeters
1 mm = 0.001 m
km, kilometer, kilometers, click, clicks
1 km = 1000 m
nm, nanometer, nanometers
1 nm = 1 x 10^-09 m
N.M., nautical mile, nautical miles, nauticalmile, nauticalmiles, NM
1 N.M. = 1852 m
AU, astronomical unit, astronomical units, au
1 AU = 149,597,870,691 m
pc, parsec, parsecs
1 pc = 206,265 m (approximately)
ly, light year, light years
1 ly = 3.08568 x 10^+16 m (approximately)
R_Earth, Earth radius, Earth radii, RE
1 R_Earth = 6371.01 km
in, inch, inches
1 in = 2.54 cm
ft, foot, feet
1 ft = 12 in
yd, yard, yards, pace, paces
1 yd = 3 ft
mi, mile, miles, statute mile, statute miles
1 mi = 1760 yd
furlong, furlongs
1 furlong = 1/8 mi
fm, fathom, fathoms
1 fm = 6 ft
Angstrom
1 Angstrom = 0.1 mm
ha, hectare, hectares
1 ha = 10000 m^2
acre, acres, ac
1 acre = 1/640 mi^2
barn, barns
1 barn = 1 x 10^-24 cm^2
L, liter, liters
1 L = 1000 cm^3
mL, milliliter, milliliters
1 mL = 0.001 L
cc, cubic centimeter, cubic centimeters
1 cc = 1 mL
gal, gallon, gallons
1 gal = 231 in^3
qt, quart, quarts
1 qt = 1/4 gal
pt, pint, pints
1 pt = 1/2 qt
flOz, fluid ounce, fluid ounces, floz
1 flOz = 1/16 pt
g, gram, grams
kg, kilogram, kilograms, kilo, kilos
1 g = 0.001 kg
mg, milligram, milligrams
1 mg = 0.001 g
MT, Metric Ton, Metric Tons
1 MT = 1000 kg
M_Earth, Earth mass, Earth masses, earth mass, earth masses, earthmass, earthmasses
1 M_Earth = 5.9742 x 10^24 kg
M_Sun, Solar mass, Solar masses, solar mass, solar masses, sunmass, sunmasses
1 M_Sun = 1.9891 x 10^30 kg
amu, atomic mass unit, atomic mass units
1 amu = 1.66053873 x 10^-27 kg
s, second, seconds, sec, secs
ms, millisecond, milliseconds
1 ms = 0.001 s
min, minute, minutes, mins
1 min = 60 s
hr, hour, hours, h
1 hr = 60 min
d, day, days
1 d = 24 hr
wk, week, weeks
1 wk = 7 d
fortnight, fortnights
1 fortnight = 14 days
yr, year, years, (Julian) year, (Julian) years, y, yrs
1 y = 365.25 days
sY, (sidereal) year, (sidereal) years
1 sY = 365.256360417 days
c, light, light, lightspeed
1 c = 2.99792458 x 10^8 m/s
mach
1 mach = 331.46 m/s
mph, mile per hour, miles per hour
1 mph = 1 mi/hr
kph, kilometer per hour, kilometers per hour
1 kph = 1 km/hr
kt, knot, knots
1 kt = 1 N.M./hr
gravity, gravities
1 gravity = 9.80665 m/s^2
Hz, Hertz, hz
1 Hz = 1 s^-1
MHz, megaHertz, megahertz
1 MHz = 1,000,000 Hz
kHz, kiloHertz, kilohertz
1 kHz = 1000 Hz
N, Newton, Newtons, newton, newtons
1 N = 1 kg m/s^2
dy, dyne, dynes
1 dy = 0.00001 N
kgf, kg of force, kg of force
1 kgf = 1 kg gravity
sthene
1 sthene = 1000 N
lb, pound, pounds, lbs
1 lb = 4.448222 N
oz, ounce, ounces
1 oz = 1/16 lb
H2O, water
1 H2O = 1 gravity g/cm^3
Hg, Mercury
1 Hg = 13.5951 H2O
Pa, Pascal, Pascals, pascal, pascals
1 Pa = 1 N/m^2
kPa, kilopascal, kilopascals,
1 kPa = 1000 Pa
atm, atmosphere, atmospheres
1 atm = 101325 Pa
J, Joule, Joules, joule, joules
1 J = 1 kg m^2/s^2
erg, ergs
1 erg = 1 x 10^-7 J
BTU, BTUs
1 BTU = 1/1055.056 J
kWh, kilowatt-hour, kilowatt-hours
1 kWh = 1000 W hr
eV, electron Volt, electron Volts
1 eV = 1 electron V
W, Watt, Watts, watt, watts
1 W = 1 kg m/s^3
hp, horsepower
1 hp = 550 ft lb/s
C, Coulomb, Coulombs, coulomb, coulombs
1 C = 1 A s
electron, electron charge, electron charges
1 electron = 1.602176462 x 10^-19 C
V, Volt, Volts, volt, volts
1 V = 1 W/A
Ohm, Ohms, ohm, ohms
1 Ohm = 1 V/A
A, Ampere, Amperes, ampere, amperes, amp amps
1 A = 1 coulomb
mA, milliAmpere, milliAmperes, milliamp, milliamps
1 A = 0.001 mA
S, siemens, mho
1 siemens = 1 Amp/Volt
F, farad, farads
1 farad = 1 coulomb/volt
uF, microfarad, microfarads
1 uF = 1,000,000 F
Wb, weber, webers
1 weber = 1 volt second
H, henry
1 henry = 1 weber/amp
T, tesla, teslas
1 tesla = 1 weber/m2
gauss
1 gauss = 10-4 tesla
deg, degree, degrees
rad, radian, radians
1 rad = 57.295779513 degrees
sr, steradian, steradians
1 sr = 3282.806 degrees
arcmin, arcminute, arcminutes
1 arcmin = 1/60 deg
arcsec, arcsecond, arcseconds
1 arcsec = 1/60 arcminutes
rev, revs, revolution, revolutions
1 rev = 360 degrees
B, byte, bytes
kB, kilobyte, kilobytes
1 kB = 1024 B
MB, megabyte, megabytes
1 MB = 1024 kB
GB, gigabyte, gigabytes
1 GB = 1024 MB
TB, terabyte, terabytes
1 TB = 1024 GB
bit, bit, bits
1 bit = 1/8 B
Planck's constant, Planck's constants
1 h = 6.62606876 x 10^-34 J s
G, Big G
1 G = 6.673 x 10^-11 N m^2/kg^2
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