berkeley.edu vs psu.edu: domain authority

Bold = the stronger value. Ranks: lower is better.

Tech stack and AI crawler policy

More berkeley.edu comparisons

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How the authority score is calculated

The score is the average of two parts, each from 0 to 100:

• Rank part: 100 × (1 − log10(rank) / log10(N))^0.6, where rank is the domain's harmonic centrality position in the Common Crawl web graph (how close it is to every other domain through links) and N is the number of ranked domains (133,241,980).
• Link part: 100 × log10(1 + referring domains) / 7, so 10 million referring domains = 100.

It is consistent across all 120 million domains in the data, so it is good for ranking and filtering lists. It is not Moz Domain Authority or Ahrefs Domain Rating. Referring domains count other domains that link to this one, not individual backlinks; no list of linking pages is included.

FAQ

Which has higher domain authority, berkeley.edu or psu.edu?

berkeley.edu has the higher authority score (77 vs 76) and berkeley.edu has 1.6 times as many referring domains. Both are among the highest-authority education sites in our data (2026-10-03). Scores are from our open-data metric (0-100), not Moz DA or Ahrefs DR.

How many referring domains do berkeley.edu and psu.edu have?

berkeley.edu has 105,090 referring domains and psu.edu has 67,503 in the Common Crawl web graph (release cc-main-2026-jul-aug-sep).