# PX to REM Converter

> Convert between pixels, rem and em using your project root font size.

To convert pixels to rem, enter a pixel value and your root font size, which is 16px by default in every browser. REM units scale with the user's browser font-size preference, which is why they are the accessible choice for typography and spacing.

**URL:** https://convertto.tech/t/px-rem-converter
**Category:** CSS Generators (https://convertto.tech/c/css-generators)
**Privacy:** Runs entirely in the browser; no upload
**Cost:** Free, no sign-up
**Last updated:** 2026-08-01

## Key facts

- **Privacy:** Runs entirely in your browser — nothing is uploaded
- **Cost:** Free, unlimited, no sign-up

## How to use

1. Set the value.
2. Choose the unit.
3. Set the root font size.
4. The result appears immediately — copy or download it.

## FAQ

### Should I use rem or px?

Use rem for font sizes and spacing so the layout respects a user's browser font-size setting. px is fine for borders, shadows and anything that should not scale.

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