PX to REM Converter
Convert between PX, REM, EM, and PT CSS units with customizable base size
Unit Converter
Quick Reference Table
| PX | REM | EM | PT |
|---|
CSS Variables Output
Usage Examples
Typography Scale
Convert a complete typography scale from pixels to REMs for responsive web design.
Responsive Layout
Convert spacing and sizing values from PX to REM for fluid responsive layouts.
CSS Variables
Generate CSS custom properties with REM values from your pixel-based design system.
Features
Bidirectional Conversion
Convert from any unit to all others instantly — PX, REM, EM, and PT
Quick Reference Table
See common pixel values and their REM, EM, and PT equivalents at a glance
Bulk Conversion
Paste multiple PX values at once and get all conversions in a single click
Privacy First
All unit conversions happen locally in your browser, no data sent to servers
How to Use?
Set Base Font Size
Set your base font size (default is 16px). This is used as the reference for REM and EM calculations.
Enter a Value
Type a value in any unit field (PX, REM, EM, or PT) and all others update automatically.
Copy Results
Copy individual values, the reference table, or CSS variables output for your project.
Frequently Asked Questions
What Is PX to REM Converter?
Set your base font size, type a value in any unit, and see all the others update instantly. Includes a quick reference table, bulk converter, and CSS custom properties output.
Key Features
Bidirectional conversion between PX, REM, EM, and PT. Customizable base font size, reference table for common values, bulk conversion mode, CSS variables output.
Common Use Cases
Building responsive websites with REM units, converting legacy PX-based designs, ensuring accessibility by respecting user font size preferences, or generating CSS variables for design systems.
Tips
REM is relative to the root element font size (usually 16px). EM is relative to the parent element. REM is more predictable for consistent sizing across components.
Privacy
All calculations happen in your browser. Nothing is sent to a server.