| Constant |
Value |
Units |
Description |
| ALPHAMASS |
6.6446565×10-27 |
kg |
Alpha particle mass |
| APERY |
1.202056903159594 |
|
Apery's Constant:
ζ3 = 1 + 1/23 + 1/33 +
1/43 + ... |
| ASTROUNIT |
1.495979×108 |
km |
au = astronomical unit (mean
distance between the Earth and the Sun) ≈
92.956×106 mi |
| ATMOSPHERE |
1.01325×105 |
Pa |
atm = standard atmosphere |
| ATOMICMASS |
1.66053886×10-27 |
kg |
amu = atomic mass unit |
| AVOGADRO |
6.02214153×1023 |
/mol |
Avogadro constant |
| BOHRMAGN |
927.400949×10-26 |
J/T |
Bohr magneton |
| BOHRRADIUS |
0.5291772108×10-10 |
m |
Bohr radius: size of the ground
state hydrogen atom |
| BOLTZMANN |
1.3806505×10-23 |
J/K |
Boltzmann constant |
| BTUPKJ |
0.94782 | |
Conversion factor - BTUs per
kJoule |
| c†
⇒ LIGHTSPEED |
2.99792458×108 |
m/s |
c = Speed of light
in a vacuum |
| CALORIE |
4.1868 |
J |
Energy required to raise the
temperature of one gram of water by one degree centigrade at
atmospheric pressure |
| CALPJ |
0.23885 | |
Conversion factor - calories per
Joule |
| CATALAN |
0.915965594177219 |
|
K = Catalan's
constant |
| COMPTON |
2.426310238×10-12 |
m |
Λc
= Compton Wavelength |
| CONDQ |
7.748091733*10-5 |
S |
G0 =
Conductance Quantum |
| CUBERT2 |
1.259921049894873 |
|
³√2 |
| CUBERT3 |
1.442249570307408 |
|
³√3 |
| D2RADIANS |
1.745329251994×10-2 |
|
2π/360 - Angle
conversion factor:
D2RADIANS × degrees = radians |
| DAYLENGTH |
86164.09 |
s |
Seconds per sidereal day (1
day = 23h 56m 4.09s) |
| DEUTERONMASS |
3.34358335×10-27 |
kg |
deuteron mass |
| Constant |
Value |
Units |
Description |
| e†
⇒ ENATURAL |
2.718281828459045 |
|
e = base of the natural
logarithms |
| EINV |
0.367879441171442 |
|
1.0/e |
| ELECTRIC |
8.854187817×10-12 |
F/m |
ε0
= 1/(μ0c2) =
Electric constant: permittivity of vacuum |
| ELECTRONMASS |
9.1093826×10-31 |
kg |
electron mass |
| ELECTRONVOLT |
1.60217653×10-19 |
J |
eV = electron volt |
| ELEMENTARYCHG |
1.60217653×10-19 |
C |
elementary charge |
| ENATURAL (e†) |
2.718281828459045 |
|
e = base of the natural
logarithms |
| ESQUARED |
7.389056098930650 |
|
e2 |
| ETOPI |
23.14069263277927 |
|
eπ |
| EULER |
0.577215664901533 |
|
Euler constant |
| FARADAY |
96485.3383 |
C/mol |
Faraday constant |
| FINESTRUCT |
7.297352568×10-3 |
|
Fine-structure constant |
| FIVEK |
3.106856 |
mi |
5,000 meters |
| FOOT |
0.3048 |
m |
Unit of length in the British
System (12 inches) |
| FOURTHPI |
0.785398163397448 |
|
π/4 (45°)
|
| FTLBFPJOULE |
1.35581795 | |
Conversion factor - ft-lbf per
joule |
| g†
⇒ GRAVITY |
9.80665 |
m/s² |
g = standard acceleration of
gravity (≈ 32.174 ft/s²) |
| GALUKPL |
0.219969 | |
Conversion factor - UK gallons
per liter |
| GALUSPL |
0.264172 | |
Conversion factor - US gallons
per liter |
| GASCONST |
8.314472 |
J/mol/K |
R = Molar Gas Constant |
| GRAM |
2.20462*10-3 |
lb |
Unit of mass in the Metric System
(0.03527 oz) |
| GRAVITATIONAL |
6.6742×10-11 |
m3/kg/s2 |
G = Gravitational
constant |
| GRAVITY (g†) |
9.80665 |
m/s2 |
g = standard acceleration of
gravity (≈ 32.174 ft/s²) |
| h†
⇒ PLANCK |
6.6260693×10-34 |
Js |
h = Planck constant |
| HALFMARATHON |
13.109375 |
mi |
Half Marathon: 13mi 192.5yds
≈ 21.0975km |
| HALFPI |
1.5707963267949 |
|
π/2 (90°)
|
| Constant |
Value |
Units |
Description |
| HARTREE |
4.35974417×10-18
|
J |
Hartree constant = 2×(binding
energy of the ground state electron in the hydrogen atom)
|
| INCH |
0.0254 |
m |
unit of length in British
System |
| INVFINESTR |
137.03599911 |
|
α-1
= Inverse of the fine-structure constant |
| JOSEPHSON |
483597.879×109 |
hz/V |
Kj = Josephson
constant |
| JOULEPCAL |
4.1868 | |
Conversion factor - Joules per
calorie |
| JOULEPFTLBF |
0.73756215 | |
Conversion factor - joules per
ft-lbf |
| KGPLB |
0.45359237 | |
Conversion factor - kilograms per
pound. Same value as POUND |
| KJOULEPBTU |
1.05506 | |
Conversion factor - kJoules per
BTU |
| KM |
0.6213712 |
mi |
1 kilometer |
| KMPMI |
1.609344 | |
Conversion factor - kilometers
per mile. Same value as MILE |
| KNOT |
1.15078 |
mi/hr |
1 knot (international) |
| LBPKG |
2.2046226 | |
Conversion factor - pounds per
kilogram |
| LIGHTSPEED (c†) |
2.99792458×108 |
m/s |
c = Speed of light
in a vacuum |
| LIGHTYEAR |
9.46053×1012 |
km |
Distance light travels in a year
≈ 5.8785×1012 mi |
| LITERPGALUK |
4.54609 | |
Conversion factor - liters per
UK gallon |
| LITERPGALUS |
3.7854118 | |
Conversion factor - liters per
US gallon |
| LN10 |
2.302585092994046 |
|
ln(10) = natural logarithm of
10 |
| LN2 |
0.693147180559945 |
|
ln(2) = natural logarithm of
2 |
| LN3 |
1.098612288668110 |
|
ln(3) = natural logarithm of
3 |
| LOG102 |
0.301029995663981 |
|
log10(2) |
| LOG103 |
0.477121254719662 |
|
log10(3) |
| LOG10E |
0.444294481903252 |
|
log10(e) |
| LUNARMONTH |
29.5306 |
days |
Days per lunar month |
| Constant |
Value |
Units |
Description |
| MAGNETIC |
12.566370614×10-7 |
N/A2 |
μ0 =
Magnetic constant: permeability of vacuum |
| MAGNFLUXQ |
2.06783372*10-15 |
Wb |
Φ0 =
Magnetic flux quantum |
| MARATHON |
26.21875 |
mi |
The Marathon: 26mi 385yds
≈ 42.195km |
| METER |
39.37008 |
in |
Unit of length in the Metric
System (3.28084 ft) |
| METERPYD |
0.9144002 |
|
Meters per yard |
| METRICMILE |
0.9320568 |
mi |
1500 meters |
| MILE |
1.609344 |
km |
1 mile (5,280 ft) |
| MILEPKM |
0.6213712 | |
Conversion factor - miles per
kilometer. Same value as KM |
| MUONMASS |
1.8835314×10-28 |
kg |
Muon mass |
| NAUTMILE |
1.15078 |
mi |
1 nautical mile |
| NEUTRONMASS |
1.67492728×10-27 |
kg |
Neutron mass |
| NUCLMAGN |
5.05078343×10-27 |
J/T |
Nuclear magneton |
| OUNCE |
0.028349523125 |
kg |
Unit of mass in the British
System |
| PARSEC |
3.262 |
ly |
Distance from the Sun resulting in
a parallax of 1 second of arc as seen from Earth
(3.086×1013 km &asymp 1.9176×1013
mi) |
| PERATIO |
1836.15267261 |
|
Proton-electron mass ratio |
| PHI |
1.618033988749895 |
|
Golden Ratio: Φ =
½(1+√5
)
Note: (1/Φ) = (Φ-1) |
| PHIINV |
0.6180339887498948 |
|
1/Φ Note: PHIINV =
(1/Φ) = (Φ−1) |
| PI |
3.141592653589793 |
|
π =
circumference/diameter for a circle |
| PIINV |
0.318309886183791 |
|
1.0/π |
| PIINVSQRT |
0.5641895835477563 |
|
1.0/√π |
| PISQUARED |
9.869604401089359 |
|
π2 |
| PITOE |
22.45915771836105 |
|
πe |
| Constant |
Value |
Units |
Description |
| PLANCK (h†) |
6.6260693×10-34 |
Js |
h = Planck constant |
| PLANCK2PI |
1.05457168×10-34 |
Js |
h(bar) = Planck
constant(h)/(2π)
(a.k.a. Dirac's Constant) |
| POUND |
0.45359237 |
kg |
Unit of mass in the British
System (16 ounces) |
| PROTONMASS |
1.67262171×10-27 |
kg |
Proton mass |
| RADIANS2D |
57.295779513082 |
|
360/(2π) - Angle
conversion factor:
RADIANS2D × radians = degrees |
| RADIUSEARTH |
3956.6 |
mi |
Radius of the Earth
(≈ 6367.5 km) |
| RADIUSMARS |
2104.1 | mi |
Radius of Mars (≈ 3386.2 km)
|
| RADIUSMOON |
1079.6 |
mi |
Radius of the Moon
(≈ 1737.5 km) |
| RYDBERG |
10973731.568525 |
/m |
Rydberg constant |
| SIXTHPI |
0.523598775598299 |
|
π/6 (30°)
|
| SOUNDSPEED |
331.36 |
m/s |
Speed of sound in dry air at 0°
C. (Approximations: 1193km/hr ≈
741mph ≈ 1087ft/sec). See
SpeedOfSound() for impact of temperature. |
| SQRT10 |
3.162277660168379 |
|
√10 |
| SQRT2 |
1.414213562373095 |
|
√2 |
| SQRT3 |
1.732050807568877 |
|
√3 |
| SQRT5 |
2.236067977499790 |
|
√5 |
| SQRT6 |
2.449489742783178 |
|
√6 |
| SQRT7 |
2.645751311064591 |
|
√7 |
| SQRT8 |
2.828427124746190 |
|
√8 = 2
√2
|
| SQRTE |
1.64872127070013 |
|
√e
|
| SQRTPI |
1.77245385090552 |
|
√π |
| STEFANBOLTZ |
5.670400×10-8 |
W/m2/K4 |
Stefan-Boltzmann constant |
| TAUMASS |
3.16777×10-27 |
kg |
Tau mass |
| TENK |
6.213712 |
mi |
10,000 meters |
| THIRDPI |
1.0471975511966 |
|
π/3 (60°)
|
| TWOPI |
6.28318530717959 |
|
2π |
| YARDPM |
1.093613 |
|
Yards per meter |
| YEAR |
365.2425 |
days |
Days per year |
| Constant |
Value |
Units |
Description |