A calculator is an instrument or gadget used for mathematical computations. It might be a software program on a computer or smartphone, or it could be a real technological gadget. Calculators are capable of performing a wide range of operations, including exponents, trigonometry, logarithms, and multiplication and division.

Depending on the kind of calculator, they may also do statistical operations, graphing functions, and financial computations. While contemporary calculators may have touch displays or be software-based, traditional calculators utilize physical buttons for input.