How to Use CSS Unit Converter
Follow this simple step-by-step guide to get the most out of our free online CSS Unit Converter:
- 1Drag the Base font size slider, which runs from 8px to 32px, to set the root size.
- 2Type the measurement you want converted into the Input value number field.
- 3Choose Pixels, REM, EM, Points, or Percent in the Input unit dropdown.
- 4Read the other four units in the result rows and copy any one with its copy control.
- 5Use the Quick reference block to see what 1rem, 1em, 1pt, and 100% equal at your base size.
Key Features & Capabilities
Zero Uploads
Execution occurs 100% locally in your browser memory for maximum privacy.
Instant Latency
Zero network lag or server queues — get results instantaneously as you type.
Quick Export
One-click copy to clipboard or instant file download options built right in.
Technical Specifications & Privacy Guarantee
At utilitiestools.net, privacy and data security are core design principles. When using CSS Unit Converter, your inputs are parsed and processed locally via client-side JavaScript execution engine. No plain text, uploaded media, or API tokens are transmitted over the internet or logged into remote server infrastructure.
Common Practical Use Cases
- Design Handoff: translate a 24px heading from a mockup into the rem value your stylesheet uses.
- Accessibility Work: move fixed pixel font sizes to rem so text scales with a user's browser font setting.
- Print Stylesheets: convert a points measurement from a print spec into the pixel equivalent at 96 DPI.
- Root Size Experiments: slide the base font size to 14 or 18px and see how every rem value in your scale shifts.
Frequently Asked Questions
Pixels, rem, em, points and percent. Enter a value in any one of them and the other four are calculated at once, each with its own copy button.