BidirectionalReference Table100% Private
Reference Table (base: 16px)
How It Works
1
Set Base
Choose your root font size (default 16px).
2
Enter Value
Type a px or rem value to convert.
3
Copy Result
Use the converted value in your CSS.
Frequently Asked Questions
What is the default base font size?
Browsers default to 16px. You can change the base in this tool to match your project settings.
Why use rem instead of px?
Rem units scale with the root font size, making designs more accessible and responsive to user preferences.
How is rem calculated?
rem = px / base. For example, 24px / 16px base = 1.5rem.
Love this tool? Explore 999+ more
Free online tools for images, PDFs, text, code, and more. All running in your browser.
Explore All Tools