Instructions
- From:
- You may write a numerical value and a permissible unit into the
free-form field. Alternatively, the unit may be selected from
the selector box. The numerical value may be omitted (default is 1).
- To:
- You may select the "wanted" unit from the selector box.
Alternatively, a permissible "wanted" unit (US name) may be written into
the free-form field (usually, no numerical value).
- Numerical value
- unsigned integer or decimal number. A power of ten may be appended
by suffixing "+" or "-" and the exponent. "|" denotes a fraction.
The numbers "pi" and "mole" are predefined. Examples:
- 4711
- 2.71828182845
- 3+6 (3 millions)
- 1-3 (1 thousandth)
- 1|3 (1 third)
- Unit
- You may choose the international symbol or the US name, case is observed.
Note: "h" denotes the Planck constant, "hr" is equivalent to "hour".
"g" is equivalent to "gram", whereas "grav" (or "force") denotes
the gravitational acceleration. "mol" denotes the SI unit, whereas "mole"
(or "Mol") is numerically equal to Avogadro's number ("NA").
- Basic units are separated by "-" or spaces, division is indicated by "/",
powers by suffixed positive integers. Example:
- m2 (= square meters)
- m2-kg/s2 (= joule, SI unit J)
- Erroneous symbols in the output
- in the "conformability" output, negative exponents are incorrectly
displayed; the meanings are as follows:
/ to the -1
. to the -2
- to the -3
, to the -4
+ to the -5
- Currency Conversion
- You should follow the link given above. Our table is only valid
for euro currencies!
Symbol US-Name
------ -------
A amp (ampere)
C coul (coulomb)
dyn dyne
erg erg
F farad
G gauss
g gm (gram)
H henry
Hz hz (hertz)
J joule
K degC (kelvin)
kg kg (kilogram)
l liter
m m (meter)
MHz mhz (megahertz)
ml ml (milliliter)
mol
Mx maxwell
N nt (newton)
Oe oe (oersted)
P poise
Pa pascal
s s (sec, second)
St stoke
T tesla
V volt
W watt
Wb weber
Ohm (Omega) ohm
Constants
a0 Bohr radius (bohrradius)
alpha reciprocal fine structure constant
amu atomic mass unit
au astronomical unit
c speed of light in vacuum
e elementary charge
epsilon permittivity of vacuum (permittivity)
faraday Faraday constant
force acceleration of gravity
gammae electron gyromagnetic ratio
gammap proton gyromagnetic ratio (in water)
ge electron Lande factor (g value)
gH proton Lande factor
grav acceleration of gravity (same as force)
Grav gravitational constant (gravity)
h Planck constant (planckconstant)
hartree atomic energy unit
hbar h/2 pi (hquer)
k Boltzmann constant (boltzmannconstant)
lambdac Compton wavelength (comptonwavelength)
me electron rest mass (electronmass)
mn neutron rest mass (neutronmass)
mp proton rest mass (protonmass)
mole equal to Avogadro's number (pure number!)
Mol same as mole
mu permeability of vacuum (permeability)
muB Bohr magneton (mub, bohrmagneton)
mun nuclear magneton (muN, nuclearmagneton)
NA Avogadro's number (unit /mol)
nue electron Larmor frequency factor
nup proton Larmor frequency factor
pi 3.14159... (Ludolf's number)
R gas constant
Vmol molar volume
The script makes use of the Unix program units.
For further details, see the man page of
units
|