Convert Pixels, REM, EM & CSS Viewport Units
Convert pixels to rem, em, points, inches, centimeters, and all CSS units with our free pixel converter. Essential tool for web developers and designers working with responsive design, accessibility, and cross-platform layouts.
Pixel Converter
CSS Unit Conversion Features
All CSS Units Supported: Convert between px, rem, em, pt, pc, in, cm, mm, vw, vh, and percentage
Bi-Directional Conversion: Convert from any unit to any unit instantly
Real-Time Results: See conversion results as you type with precision up to 4 decimal places
REM/EM Base 16: Standard 16px base for accurate rem and em calculations
Viewport Units: Convert to vw/vh based on 1920x1080 standard viewport
Swap Function: Instantly reverse conversion direction with one click
Accurate Calculations: Precise conversion factors for all unit types
Developer-Friendly: Clean interface designed for rapid workflow
Perfect for responsive web design, CSS development, accessibility compliance (WCAG font sizes), print design conversion, mobile-first development, and design system creation. Essential for frontend developers, UI/UX designers, and web design teams.
Frequently Asked Questions
Enter your pixel value, select 'px' as the source unit, choose 'rem' as the target unit, and the conversion appears instantly. For example, 16px = 1rem (based on standard 16px root font size). This is essential for creating scalable, accessible websites that respect user font size preferences.
Divide pixels by 16 (the default browser font size). For example: 24px ÷ 16 = 1.5rem. Our converter handles this automatically for all units including px, rem, em, pt, cm, inches, viewport units (vw, vh), and percentages with precise 4-decimal accuracy.
Using rem units makes websites more accessible by respecting user browser font size settings, improves responsive design scalability, ensures consistent spacing across different screen sizes, and meets WCAG accessibility guidelines. Rem units scale proportionally when users adjust their default font size, unlike fixed pixel values.
Yes! Select px as source and choose inches (in), centimeters (cm), or millimeters (mm) as target. This is perfect for converting screen designs to print specifications. For example, 96px = 1 inch (at standard 96 DPI), useful for preparing web graphics for print materials.
Viewport Width (vw) and Viewport Height (vh) are CSS units relative to browser window size. 1vw = 1% of viewport width, 1vh = 1% of viewport height. Our converter uses standard 1920x1080 viewport as baseline. For example, 100px ≈ 5.2vw. Perfect for creating truly responsive layouts.