Math
Antilog Calculator
Compute the inverse logarithm: 10^x, e^x, 2^x, or any custom base. Handles negative exponents and shows scientific notation for big results.
Antilogarithm
10^2 =
100
Equivalent form: e^(2 * ln(10))
Frequently Asked Questions about the Antilog Calculator
What is an antilog?
An antilogarithm is the inverse of a logarithm: it raises the base back to the power x. If log_b(y) = x, then antilog_b(x) = b^x = y. So antilog_10(2) = 10^2 = 100.
How is antilog different from a regular exponent?
Mathematically it is the same operation: both compute b^x. The difference is intent. You reach for an antilog calculator when reversing a logarithm, for example reading a pH back to a hydrogen-ion concentration.
Which base should I pick?
Use base 10 for common logarithms (pH, decibels, Richter scale). Use base e for natural logarithms (calculus, continuous compounding, exponential growth and decay). Use base 2 for information theory and computer science (bits, doubling time). Pick custom for any other base.
Why does the calculator reject some custom bases?
The base must be positive and not equal to 1. A base of 0 makes 0^x undefined for non-positive x. A base of 1 always returns 1. Negative bases produce complex numbers for non-integer exponents, so the calculator rejects them.
Why does the result switch to scientific notation?
Exponential growth gets huge fast. 10^15 is one quadrillion; 10^-7 is one ten-millionth. Scientific notation (1.5e+15 or 3.16e-7) keeps six significant figures readable.