# Modular Multiplicative Inverse Calculator

Free and fast online Modular Multiplicative Inverse calculator that solves *a*, such that such that *a**x* ≡ 1 (mod *m*). Just type in the number and modulo, and click Calculate.
This Modular Multiplicative Inverse calculator can handle
big numbers, with any number of digits, as long as they are positive integers.

For a more comprehensive mathematical tool, see the Big Number Calculator.

See also: Code-Breaking overview | Babylonian numerals | Big number calculator | Binary to decimal | Decimal to binary | Decimal to hex | Euler number | Golden ratio | Hex to decimal | Mayan numerals | Modular exponentiation | Pi | Prime numbers | Roman numerals