The unit of information obtained by using the natural logarithm 
instead of the base-2 logarithm 
when defining entropy and related information theoretic
functions. When 
is used instead, information content is obtained in the more convenient unit of bits.
Nat
See also
Entropy, Mutual Information, Relative EntropyExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Nat." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Nat.html