Mathematical and other constants

You are here: Home / Reference Tables / General / Mathematical and other constants

This is a small collection of constants that might come in handy. These were collected in the days before Google. So it is possible to obtain more accurate numbers on line. But I rather like having them in one place. Besides, they work on my old sliderule just fine!


Pi
p
3.14159265
 
e
e
2.71828183
 
 
 
 
 
Absolute zero (0 Kelvin)
 
-273.160000
Celsius
Acceleration due to Earth’s gravity
a
9.81
metres/second²
Avogadro’s number
N
6.02E-023
molecules/mole
Electronic charge
e
1.60E-019
coulombs
Electron, mass of
m
9.11E-031
kg
Electron, charge/mass ratio
e/m
1.76E+011
coulombs/kg
Electron, radius of
r
2.19E-015
metres
Faraday’s Constant
F
66487
C/mole
Gas Constant
R
8.31E+000
j/K/mole
Gravitational constant
G
6.67E-011
Newtons metres²/kg
Latent heat of evaporation of water
 
2.26E+006
joules/kg
Latent heat of fusion of ice
 
333400
joules/kg
Mechanical equivalent of heat
 
4.18
joules/calorie
Plank’s constant
h
6.63E-034
joules seconds
Velocity of sound at STP
 
343.6
metres/second
Velocity of light in vacuo
c
299792500
metres/second
 
 
 
 
Radius of Planet Earth
 
6378100
metres
Geostationary Orbit
 
35786000
metres

Home | Tables | General