What is CSS pt unit?

Points (pt) are absolute-length units primarily used in print. One point is equal to 1/72 of an inch.

1in = 72pt72pt × 40pt

Frequently Asked Questions about pt units

Should I use pt for web content?
Points are generally not recommended for web content. Use relative units like rem or em for better accessibility and responsiveness.
When are points useful?
Points are mainly useful in print stylesheets (CSS @media print) where precise physical measurements are needed.