REM to PX Converter

Free online REM to PX converter. Instantly convert REM units back to pixels with a customizable root font size. Enter a value in either field to convert both ways.

What is REM?

REM (Root EM) is a CSS unit relative to the root element's font size. While REM is ideal for responsive design, you sometimes need the exact pixel value, for JavaScript calculations, design handoffs, or debugging. This converter instantly maps any REM value to its pixel equivalent.

Formula

PX = REM × root font size

With the default 16px root font size: 2rem × 16 = 32px. Adjust the root font size below to match your project.

Calculator

REM

Pixels (PX)

Root font size (px):

1rem = 16px at root font size 16

Common Conversions (base 16px)

REM	PX
0.5rem	8px
0.75rem	12px
0.875rem	14px
1rem	16px
1.5rem	24px
2rem	32px

Frequently Asked Questions

Multiply the REM value by the root font size. With the default 16px root: 2rem × 16 = 32px.

1rem equals the root font size in pixels. By default in most browsers, 1rem = 16px.

You may need to convert rem to px when working with JavaScript APIs that require pixel values (like getBoundingClientRect), or when debugging CSS layout issues.

Related Conversions

PX to REM PX to EM EM to PX PX to VW VW to PX

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