Natural Log of 4

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What is ln 4?

Answer

ln 4 ≈
1.3863

ln is the natural log, base e ≈ 2.71828.

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

ln 4 is the power you raise e ≈ 2.71828 to, to get 4: ey = 4.

e¹ ≈ 2.7183 < 4 < e² ≈ 7.3891, so 1 < ln 4 < 2

Oxy1

Answer point ≈ (4, 1.3863).

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

Log of 4 in different bases
BaseNotationValue
eln 4≈ 1.3863
10log 4≈ 0.6021
2log₂ 42

See Also

Natural log of nearby numbers

FAQ

What is ln 4?

ln 4 ≈ 1.3863

What is the difference between ln 4 and log 4?

ln 4 is the logarithm to base e, log 4 is to base 10: ln 4 ≈ 1.3863, log 4 ≈ 0.6021. One is the other divided by ln 10: log 4 = ln 4 / ln 10 ≈ 0.6021.

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.