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CSS Unit Converter

Convert between CSS units: px, rem, em, %, vw, vh, pt. Customize base font size, parent font size, and viewport dimensions.

Context Settings

Base Font Size (px)

Parent Font Size (px)

Viewport Width (px)

Viewport Height (px)

Value

From

To

⚡CSS Unit Tips

• 1rem = root font size (usually 16px by default)
• Use rem for consistent spacing, em for component-relative sizing
• vw/vh units are relative to viewport dimensions
• Set custom base font size to match your project's root styling

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