Calculating Base-2 Logarithms

There are a number of ways to make these calculations easily using either a calculator or Excel. You can calculate log₂(X) in the following ways:

Excel: Use the built in formula LOG(Number, Base) => LOG(X,2)

Calculator: Rely on the following identity. This does require that your calculator has a X^Y function:

log_Z(X) =

log₁₀(X)

log₁₀(Z)

=> log₂(X) =

log₁₀(X)

log₁₀(2)

Note that you could use any base in place of log₁₀, for example ln (base e).

File translated from T_EX by T_TH, version 2.21.
On 25 Sep 2001, 13:07.