Physical Constants
Fundamental physical constants are physical quantities that are universal in nature and have constant values in time. Wolfram|Alpha provides definitions, values and other details for a wide range of physical constants, such as the Newtonian gravitational, Boltzmann and magnetic constants.
Constants
Find information about physical constants, including their values, dimensionality and definitions.
Get the value of a physical constant:
Specify a constant by symbol:
Calculations with Constants
Calculate the value of combinations of physical constants and other quantities.