Web platform features explorer - round(), mod(), and rem()

Web platform features explorer

The round(), mod(), and rem() CSS functions compute rounded values and the remainder after division.

Status

Baseline Newly Available (since 2024-05-17)

This feature is expected to reach Baseline Widely Available status on: 2026-11-17

MDN documentation

Specifications

CSS Values and Units Module Level 4 (#round-func), from Cascading Style Sheets (CSS) Working Group (W3C).

Browser support

Chrome 125 Released on 2024-05-14
Chrome Android 125 Released on 2024-05-14
Edge 125 Released on 2024-05-17
Firefox 118 Released on 2023-09-26
Firefox for Android 118 Released on 2023-09-26
Safari 15.4 Released on 2022-03-14
Safari on iOS 15.4 Released on 2022-03-14

Developer signals

State of CSS 2025: reading_list/reading_list question
State of CSS 2025: features/all_features question
State of CSS 2024: features/all_features question

Usage (according to Chrome Platform Status)

~0.568% of page loads. More data at chromestatus.

Web Platform Tests (WPT)

View the latest WPT test results for this feature

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