calc()Baseline · Widely available
The calc() CSS function computes mathematical expressions such a calc(100%/3 - 1em).
Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Jul 29, 2015. Widely available since Jan 29, 2018.
Browser support
DesktopChrome
1–25Not supported
26+Supportedsince Mar 26, 2013
Current: 155Edge
12+Supportedsince Jul 29, 2015
Current: 154Firefox
1–15Not supported
16+Supportedsince Oct 9, 2012
Current: 157Safari
1–6Not supported
7+Supportedsince Oct 22, 2013
Current: 27MobileChrome Android
18–27Not supported
28+Supportedsince Jul 10, 2013
Current: 155Firefox Android
4–15Not supported
16+Supportedsince Oct 9, 2012
Current: 157Safari iOS
1–6Not supported
7+Supportedsince Sep 18, 2013
Current: 27How to use
This feature is Baseline widely available — use it freely, no fallback needed.
Example
Full syntax and examples are on MDN: calc.
Feature detection
There’s no simple runtime check for this feature; rely on the support table and test in your target browsers.
Sub-features
Support for each part of the feature (4). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| <calc> | 26 | 12 | 16 | 7 | 28 | 16 | 7 |
| <calc>.gradient_color_stops | 26 | 12 | 19 | 7 | 28 | 19 | 7 |
| <calc>.nested | 51 | 16 | 48 | 11 | 51 | 48 | 11 |
| <calc>.number_values | 31 | 12 | 48 | 7 | 31 | 48 | 7 |