Typography Size Converter — PX, PT, EM, %

Enter a value in any unit and see all other units instantly. Configurable base font size.

px
Common conversions
pxptemrem%

How to use

  1. Set your base font size (default is 16px) to match your project.
  2. Enter a value in any unit field — px, pt, em, rem, or percent.
  3. All other fields update instantly. Click any value to copy it.

Frequently asked questions

How do I convert px to pt?

Multiply the pixel value by 0.75 (or divide by 1.333). For example, 16px = 12pt. CSS defines 1 inch as 96px and 72pt, so 1pt = 1.333px.

What is the difference between em and rem?

em is relative to the parent element font size, while rem is relative to the root (html) font size. Both default to 16px, but em compounds when nested.

How do I convert percent to px for fonts?

100% equals the base font size (usually 16px). So 150% = 24px (16 × 1.5).

What base font size should I use?

The browser default is 16px. If your project sets a different font-size on the html element, adjust the base size here to match.

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