Converter Tools

CSS Units Converter

Convert CSS values between px, rem, em, percent, vw, and vh with configurable base and viewport values.

Value

From

Base font size

Viewport width

Viewport height

Percent reference px

Result

1rem

Bulk CSS Input (px values)

Converted CSS

.title { font-size: 2rem; margin-bottom: 1.5rem; }

How to use the CSS Units Converter

Enter a value

Type the number and source CSS unit.

Set references

Adjust base font size, viewport, or percent reference when needed.

Convert CSS snippets

Paste CSS to bulk-convert px values to the selected target unit.

About the CSS Units Converter Tool

Convert CSS values between px, rem, em, percent, vw, and vh with configurable base and viewport values. The css units converter runs in your browser unless the page states that it uses an external service.

Frequently Asked Questions

Is data uploaded to a server?

No. This tool runs in your browser unless the interface clearly says it needs a network request.

Can I use it for private data?

Yes. The conversion and preview steps happen locally in your browser.

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