DA vs PA: Domain vs Page Authority

DA (Domain Authority) scores a whole website’s ranking potential; PA (Page Authority) scores a single page’s. Both are Moz metrics on a 1–100 scale — the same domain/page split as Ahrefs’ DR and UR.

How they interact

Every page inherits some credibility from its domain, then earns its own through direct links. That’s why a new page on a strong site outranks the same page on a weak one — and why PA matters when comparing two specific competing pages.

Which to check when

Evaluating a guest-post site? DA for the domain, PA for the page your link would sit on — a link from a PA 1 orphan page on a DA 60 site is worth less than the seller implies. Diagnosing your own money page? Its PA against the top-ranking pages’ PA tells you the gap.

Moving the numbers

DA moves with domain-wide link diversity (DA service); PA moves with page-targeted links plus internal linking from your strongest pages. Related: the Ahrefs equivalent