speed_of_light = 2.99792458e8

gravitational_constant = 6.673e-11

plancks_constant_h = 6.62606896e-34

plancks_constant_hbar = 1.05457162825e-34

astronomical_unit = 1.49597870691e11

light_year = 9.46053620707e15

parsec = 3.08567758135e16

grav_accel = 9.80665e0

electron_volt = 1.602176487e-19

mass_electron = 9.10938188e-31

mass_muon = 1.88353109e-28

mass_proton = 1.67262158e-27

mass_neutron = 1.67492716e-27

rydberg = 2.17987196968e-18

boltzmann = 1.3806504e-23

molar_gas = 8.314472e0

standard_gas_volume = 2.2710981e-2

minute = 6e1

hour = 3.6e3

day = 8.64e4

week = 6.048e5

inch = 2.54e-2

foot = 3.048e-1

yard = 9.144e-1

mile = 1.609344e3

nautical_mile = 1.852e3

fathom = 1.8288e0

mil = 2.54e-5

point = 3.52777777778e-4

texpoint = 3.51459803515e-4

micron = 1e-6

angstrom = 1e-10

hectare = 1e4

acre = 4.04685642241e3

barn = 1e-28

liter = 1e-3

us_gallon = 3.78541178402e-3

quart = 9.46352946004e-4

pint = 4.73176473002e-4

cup = 2.36588236501e-4

fluid_ounce = 2.95735295626e-5

tablespoon = 1.47867647813e-5

teaspoon = 4.92892159375e-6

canadian_gallon = 4.54609e-3

uk_gallon = 4.546092e-3

miles_per_hour = 4.4704e-1

kilometers_per_hour = 2.77777777778e-1

knot = 5.14444444444e-1

pound_mass = 4.5359237e-1

ounce_mass = 2.8349523125e-2

ton = 9.0718474e2

metric_ton = 1e3

uk_ton = 1.0160469088e3

troy_ounce = 3.1103475e-2

carat = 2e-4

unified_atomic_mass = 1.660538782e-27

gram_force = 9.80665e-3

pound_force = 4.44822161526e0

kilopound_force = 4.44822161526e3

poundal = 1.38255e-1

calorie = 4.1868e0

btu = 1.05505585262e3

therm = 1.05506e8

horsepower = 7.457e2

bar = 1e5

std_atmosphere = 1.01325e5

torr = 1.33322368421e2

meter_of_mercury = 1.33322368421e5

inch_of_mercury = 3.38638815789e3

inch_of_water = 2.490889e2

psi = 6.89475729317e3

poise = 1e-1

stokes = 1e-4

stilb = 1e4

lumen = 1e0

lux = 1e0

phot = 1e4

footcandle = 1.076e1

lambert = 1e4

footlambert = 1.07639104e1

curie = 3.7e10

roentgen = 2.58e-4

rad = 1e-2

solar_mass = 1.98892e30

bohr_radius = 5.291772083e-11

newton = 1e0

dyne = 1e-5

joule = 1e0

erg = 1e-7

stefan_boltzmann_constant = 5.67040047374e-8

thomson_cross_section = 6.65245893699e-29

bohr_magneton = 9.27400899e-24

nuclear_magneton = 5.05078317e-27

electron_magnetic_moment = 9.28476362e-24

proton_magnetic_moment = 1.410606633e-26

faraday = 9.64853429775e4

electron_charge = 1.602176487e-19

vacuum_permittivity = 8.854187817e-12

vacuum_permeability = 1.25663706144e-6

debye = 3.33564095198e-30

gauss = 1e-4