<calc-keyword> | CSS Types & Functions

A CSS type representing keywords that can be used inside mathematical functions like 'calc()'. Examples include 'e' (base of natural logarithms) and 'pi'.

Quick example

.circular-path {
  /* Using pi keyword inside calc for circle math */
  width: calc(2 * pi * 10px);
}

<calc-keyword> Browser Support

Widely available Since 2023 94% global usage

This feature is well established and works across many devices and browser versions. It has been available across browsers since 2023.

Safe to use without fallbacks.

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