Constants

The use of constants optimizes the readability, speed, and accuracy of calculations. You can use these constants in any mathematical expressions and functions simply by specifying the name of the constant like this:

1.57 * ${WEIGHT} / ${HEIGHT} - ln(${IC50} * LN10)

Common Constants:

Name	Description	Value
E	Euler's number	2.718281828459045
LN2	Natural logarithm of 2	0.6931471805599453
LN10	Natural logarithm of 10	2.302585092994046
LOG2E	Base-2 logarithm of E	1.4426950408889634
LOG10E	Base-10 logarithm of E	0.4342944819032518
PI	Pi	3.1415926535897932
SQRT1_2	Square root of 1/2	0.7071067811865476
SQRT2	Square root of 2	1.4142135623730951

Other Mathematical Constants:

Name	Description	Value
APERY	Apéry's constant	1.202056903159594
BACKH	Backhouse's constant	1.456074948582689
BERN	Bernstein's constant	0.280169499023869
CATALAN	Catalan's constant	0.915965594177219
CONWAY	Conway's constant	1.303577269034296
EUMA	Euler–Mascheroni constant	0.577215664901532
ERDBOR	Erdős–Borwein constant	1.606695152415291
FEIG1	Feigenbaum constant 1	4.669201609102990
FEIG2	Feigenbaum constant 2	2.502907875095892
FHL	First Hardy–Littlewood conjecture	0.660161815846869
FROB	Fransén–Robinson constant	2.807770242028519
GAKUWI	Gauss–Kuzmin–Wirsing operator	0.303663002898732
GODI	Golomb–Dickman constant	0.624329988543550
GRATIO	Golden ratio	1.6180339887498948
HASAMC	Hafner–Sarnak–McCurley constant	0.353236371854995
KHIN	Khinchin's constant	2.685452001065306
LANRAM	Landau–Ramanujan constant	0.764223653589220
LEVY	Lévy's constant	3.275822918721811
MEME	Meissel–Mertens constant	0.261497212847642
MILLS	Mills' constant	1.306377883863080
NIVEN	Niven's constant	1.705211140105367
OMEGA	Omega constant	0.567143290409783
PLASTIC	Plastic constant	1.324717957244746
RAMSOL	Ramanujan–Soldner constant	1.451369234883381
RECFIB	Reciprocal Fibonacci constant	3.359885666243177
SIERP	Sierpiński's constant	2.584981759579253
SQRT3	Square root of 3	1.732050807568877
SQRT5	Square root of 5	2.236067977499789
UNIPAR	Universal parabolic constant	2.295587149392638

Chemical and Physical Constants:

Name	Description	Value
AVOGADRO	Avogadro's Number	6.02214e+23
FARADAY	Faraday Constant	96485.33 (C·mol-1)
ATOM	Atomic Mass Constant	1.66053906660e-27 (kg)
GAS	Molar Gas Constant	8.31446261815324 (m3⋅Pa⋅K−1⋅mol−1)
COULOMB	Coulomb constant	8.9875517923e+9 (N·m2/C2)
MAXSPEED	Speed of Light (Vacuum)	299792458 (m/s)
BOLTZ	Boltzmann constant	1.380649e-23 (J⋅K−1)
ECHARGE	Elementary charge	1.602176634e-19 (C)
GRAVITY	Standard gravity	9.80665 (m/s2)
PLANCK	Planck constant	6.62607004e-34 (J⋅Hz−1)
EMASS	Mass of electron	9.1093837015e-31 (kg)
NMASS	Mass of neutron	1.67492749804e-27 (kg)
PMASS	Mass of proton	1.67262192369e-27 (kg)