Log Base 2 of 5

Logarithm Calculator
Log base
x

What is log₂ 5?

Answer

log2 5 ≈
2.3219

log2 is the log base 2.

≈ — the logarithm is irrational; the value is rounded to 4 decimal places.

log2 5 is the power you raise 2 to, to get 5: 2y = 5.

2² = 4 < 5 < 8 = 2³, so 2 < log2 5 < 3

log2 5 = ln 5 / ln 2 ≈ 1.609438 / 0.693147 ≈ 2.3219

Oxy1

Answer point ≈ (5, 2.3219).

The curve y = log2 x passes through (1, 0) and (2, 1) and rises: for x > 1 the log is positive, for 0 < x < 1 negative.

Log of 5 in different bases
BaseNotationValue
eln 5≈ 1.6094
10log 5≈ 0.6990
2log₂ 5≈ 2.3219

See Also

Log base 2 of nearby numbers

FAQ

What is log₂ 5?

log₂ 5 ≈ 2.3219

How to calculate log₂ 5 on a calculator?

Divide the natural logs: log₂ 5 = ln 5 / ln 2 ≈ 1.609438 / 0.693147 ≈ 2.3219.

What does log without a base mean?

At school and on a calculator, log x without a base is the common log, base 10: log 100 = 2. In Python, math.log(x) is the natural log ln x; in Excel, LN is the natural log and LOG is base 10.