Em to Px Converter - CSS Unit Converter Online

Free online em to px converter. Convert between em, rem, px, pt and other CSS units. Customize base font size. Includes CSS unit reference. No signup required.

Value

Settings

Base Font Size (px)

Viewport Width (px)

Conversion Results

Unit	Value	Copy
Pixels (px)	16px
Em	1em
Rem	1rem
Points (pt)	12pt
Percent (%)	100%
Viewport Width (vw)	0.8333vw

Click any row to use that value as the new input.

CSS Unit Reference

Unit	Relative To	Use Case
px	Absolute	Fixed layouts, borders, precise sizing
em	Parent element font-size	Component-relative sizing, padding, margins
rem	Root element (html) font-size	Consistent spacing, responsive typography
pt	Absolute (1pt = 1/72 inch)	Print stylesheets, PDF generation
%	Parent element dimension	Fluid layouts, responsive widths
vw	Viewport width (1vw = 1%)	Full-width elements, responsive text

Em to Px Converter - CSS Unit Converter

This em to px converter tool lets you convert between CSS units including em, rem, px, pt, percent, and viewport units. Set a custom base font size to see accurate conversions. Includes a CSS unit reference table explaining when to use each unit. Perfect for responsive web design and CSS development. All processing happens in your browser — your data never leaves your device.

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