CM to REM Converter

Convert Centimeters (cm) to REM.

2.36rem

Assumes 96 DPI and 16px root font size by default.

About CM to REM Converter

The CM to REM converter helps web developers translate physical measurements into REM units, which are relative to the root element's font size. REM (Root EM) units are essential for creating accessible, scalable, and responsive web designs. Unlike pixels, REM units respect user font size preferences, making websites more accessible for visually impaired users. This converter assumes the standard root font size of 16px but can be adjusted based on your project's root configuration.

Formula

REM = (Centimeters × (DPI ÷ 2.54)) ÷ Root Font Size

Examples

1 cm (16px root) = 2.36 rem
5 cm (16px root) = 11.81 rem
1 cm (20px root) = 1.89 rem

Reference

  • • 1 cm = 2.362204724 rem (at 16px root, 96 DPI)
  • • Default browser root font size: 16px
  • • 1 rem = root element font size
  • • REM units cascade from html/root element

Frequency Asked Questions

How do I convert cm to REM?

First convert cm to pixels (cm × 37.795275591 at 96 DPI), then divide by your root font size (typically 16px).

What is REM in CSS?

REM stands for 'Root EM' and is relative to the root element's font size, typically 16px in browsers.

Why use REM instead of pixels?

REM units are more accessible, allowing users to scale content based on their browser font size preferences while maintaining proportional relationships.

Does the conversion change if root font size changes?

Yes, if you set a different root font size (e.g., 10px or 20px), the conversion factor changes accordingly.