Formula calculator
software calculator that can perform a calculation in two steps
A formula calculator is a software calculator that can perform a calculation in two steps:
Enter the calculation by typing it in from the keyboard.
Press a single button or key to see the final result.
This is unlike button-operated calculators, such as Windows Calculator or the Mac OS X calculator, which require the user to perform one step for each operation, by pressing buttons to calculate all the intermediate values, before the final result is shown.
In this context, a formula is also known as an expression, and so formula calculators may be called expression calculators. Also in this context, calculation is known as evaluation, and so they may be called formula evaluators, rather than calculators.
How they work
Formulas as they are commonly written use infix notation for binary operators, such as addition, multiplication, division and subtraction. This notation also uses:
Parentheses to enclose parts of a formula that must be calculated first.
In the absence of parentheses, operator precedence, so that higher precedence operators, such as multiplication, must be applied before lower precedence operators, such as addition. For example, in 2 + 3*4, the multiplication, 3*4, is done first.
Among operators with the same precedence, associativity, so that the left-most operator must be applied first.
This brief starts where responsible research should: with the source description of “Formula calculator” as software calculator that can perform a calculation in two steps. Everything that follows is an evidence route, not borrowed authority.
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The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Jul 8, 2026. The linked authority identifier is Q5470337.
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This entry incorporates text from “Formula calculator” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.