Font Size Converter
Convert between px, em, rem, pt, and percentage font sizes. Based on 16px root size.Updated 2026-03-20
The quick brown fox jumps over the lazy dog
Frequently Asked Questions
What is the default base size?
16px is the browser default root font size.
Em vs Rem?
Em is relative to parent element. Rem is relative to root (html) element.
Is this free?
Yes, completely free with no signup.