Calculate common logarithms, natural logarithms, custom-base logarithms, and inverse antilogs with this free log calculator.
Common log:
log10(x)
Natural log:
ln(x) = loge(x)
Custom base:
logb(x) = ln(x) ÷ ln(b)
Antilog:
bx
Logarithms are used in algebra, science, finance, engineering, and computer science to solve exponential equations and work with growth and decay.
They make it easier to analyze powers, scales, and exponential relationships.
Your result shows the logarithm or antilog value for the selected mode. Supporting values help explain the base used, exponent form, and decimal result.
This makes it easier to check algebra work, science equations, and exponential growth or decay calculations.
A logarithm tells you what exponent a base must be raised to in order to produce a number.
log usually means base 10, while ln means base e.
No. In real-number logarithms, the input must be greater than 0.
An antilog is the inverse of a logarithm and converts back into exponential form.