$Logarithm Calculator$

Logarithm Calculator

Calculate logarithms with different bases: common (log₁₀), natural (ln), and binary (log₂). Instant results for any positive number.

Calculate logarithms instantly with our free online logarithm calculator. Supports common log (base 10), natural log (ln), and binary log (base 2).

A logarithm answers the question: what power must we raise a base to get a number? For example, log₁₀(100) = 2 because 10² = 100.

log usually means log base 10 (common logarithm), while ln is the natural logarithm with base e (≈2.718).

Logarithm Type

Enter Number

log₁₀(x) = ?

Enter Integer

n! = ?

Calculation Steps

Enter Number

|x| = ?

Enter Number

Decimals

round()

Nearest

floor()

Round Down

ceil()

Round Up

trunc()

Truncate

Enter Values

Dividend (a)

mod

Divisor (b)

a mod b = ?

Explanation

Math Functions

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