Antilog Calculator. Enter a logarithm value and a base to find the antilogarithm (inverse log). The Antilog Calculator raises your chosen base to the power of the log value — giving you back the original number. Supports base 10, natural log (base e), and any custom base you specify. Also try the Logarithm Calculator (log).
An antilogarithm (antilog) is the inverse of a logarithm. If log_b(x) = y, then the antilog of y with base b equals x, calculated as x = b^y. It essentially reverses the log operation to recover the original number. See also our find Log Reduction with Log Reduction Calculator.
To find the antilog, raise the base to the power of the logarithm value. The formula is x = b^y, where b is the base and y is the log value. For example, the antilog of 2 in base 10 is 10^2 = 100.
The antilog of 3 in base 10 is 10^3 = 1000. This means that log₁₀(1000) = 3, and reversing that operation gives you 1000.
The natural antilog uses Euler's number e (≈ 2.71828) as the base. It is equivalent to the exponential function e^y. For example, the natural antilog of 1 is e^1 ≈ 2.71828.
The antilog₁₀(100) = 10^100, which is an astronomically large number known as a googol. This illustrates how rapidly antilog values grow as the log value increases.
No. The base of a logarithm or antilogarithm must be a positive number and cannot equal 1. Negative bases and a base of zero are undefined in standard logarithm rules. If no base is specified, base 10 is used by convention.
To remove a logarithm from an equation, apply the antilog to both sides. If log_b(x) = y, then taking the antilog gives x = b^y. This is the fundamental relationship that allows you to switch between logarithmic and exponential forms.
The antilog (or exponential) function x = b^y is a rapidly increasing curve for b > 1, passes through the point (0, 1), and is always positive. It is the mirror image of the log function reflected across the line y = x. You might also find our find f(x) Result with Exponential Function Calculator useful.