Antilogarithms in base 10, e, 2 or any custom base — with the log/antilog round-trip shown.
The antilog of x in base b is b raised to the power x. For example, antilog10(2) = 100.
antilog result
How to use this tool
Base 10, base e (natural), base 2, or a custom base of your own.
This is the exponent: the antilog is the base raised to this power.
The plain value and scientific notation are both shown.
Taking the log of the answer in the same base returns your original value.
Formula & worked example
Antilog10(2) = 100, because log10(100) = 2. Antilog2(10) = 2^10 = 1,024. Antilog_e(0) = 1, because e^0 = 1.
Limitations — read this before you rely on it
Very large exponents overflow to infinity and are refused with a message rather than shown as a meaningless number. Bases must be positive and not equal to 1, where logarithms are undefined.
Frequently asked questions
The antilog of x in base b is b^x — the number whose logarithm (in that base) equals x.
100, because 10^2 = 100.
The antilog in base e, which is just the exponential function: antilog_e(x) = e^x.
They are inverses: log_b(antilog_b(x)) = x, and antilog_b(log_b(y)) = y.
Base 10 for the 10^x key and base e for the e^x key; this calculator also supports base 2 and custom bases.