What does calculator mean?
A calculator is a device designed to perform mathematical operations, from simple addition and subtraction to complex scientific and statistical functions. Today the term almost always denotes an electronic instrument — typically pocket-sized, with a keypad and digital display — though it historically referred to mechanical adding devices such as the abacus-assisted reckoning boards and geared machines of earlier centuries, and even to people employed to carry out computations by hand. Calculators range from basic four-function models to graphing calculators capable of plotting equations and running programs, and they remain fixtures of classrooms, offices, and laboratories despite the ubiquity of smartphones. The word carries no particular emotional charge; it is neutral, practical vocabulary. Its roots lie in the Latin calculus, meaning small stone, a nod to the ancient practice of counting with pebbles.
A device, especially an electronic one, that performs mathematical calculations.
"Students were permitted to use a calculator during the exam."
By far the dominant modern sense.
A person who performs calculations, especially as an occupation.
"Before computers, banks relied on skilled human calculators."
Now largely historical or specialist in register.
Standard regular plural.
"The classroom set included thirty calculators."
The word 'calculator' literally means 'pebble-counter' — before electronics, Romans did their math by moving small stones across a grooved board.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of calculator
Calculator comes from the Latin verb calculare, meaning to reckon or count, itself derived from calculus, a diminutive of calx meaning limestone or pebble. Roman mathematicians performed arithmetic by moving small stones across a counting board, so the word's origin literally reflects counting with pebbles. The term entered English around the mid-17th century, initially describing either a person who calculates or, later, a mechanical reckoning device; its modern dominance as the name of the electronic calculator dates from the mid-20th century.
Related word forms
How calculator is actually used
Almost always refers today to the electronic handheld device; the sense of 'a person who calculates' is now largely historical or specialist. In British English the term is standard, with no significant regional variation.
Easily confused with calculator
Calculus is a branch of mathematics dealing with rates of change, while a calculator is a device for performing arithmetic; both derive from the same Latin root meaning small counting stone.