Calculate the antilogarithm (inverse log) of a value for base 10, e, 2, or any custom base.
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Common bases
Result
Antilog result for 10^2.
How it works
The antilogarithm reverses a logarithm. If logb(y) = x, then antilogb(x) = bx = y. This calculator computes baseexponent for any positive base other than 1.
Also in Functions
Algebra
The antilog calculator computes the inverse logarithm — given a log value and a base, it returns the original number. Supports common log (base 10), natural log (base e), binary log (base 2), and any custom base.
If log_b(x) = y, then the antilog is x = b^y. The antilogarithm reverses the logarithm operation. For example, if log10(1000) = 3, then antilog10(3) = 1000.
The most common bases are 10 (common log), e ≈ 2.718 (natural log), and 2 (binary log used in computing). Any positive base other than 1 is valid.
antilog_b(y) = b^y
The antilog of y in base b is b raised to the power y.
The base must be positive and not equal to 1. Very large exponents may exceed floating-point range and return Infinity.
Frequently asked questions
Log finds the exponent: log10(100) = 2. Antilog finds the original number from the exponent: antilog10(2) = 100. They are inverse operations.
Use the power key: for antilog base 10 of 3, calculate 10^3 = 1000. For natural antilog, calculate e^y.
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