Harmonic Centrality
FAQ
A connected guide to the harmonic centrality formula, graph direction, score interpretation, and the Common Crawl data behind this calculator. Each answer links to the next useful concept.
Calculate a domain’s Harmonic Centrality →What is harmonic centrality?
Harmonic centrality measures how close a node is to the other nodes it can reach in a network.
READ ANSWER →How is harmonic centrality calculated?
For each node, add 1 divided by the shortest path distance to every other reachable node.
READ ANSWER →What do the harmonic centrality score and rank mean?
The score is a raw sum of reachable-node contributions. The rank is its position among domains in that graph release; lower rank is better.
READ ANSWER →How is harmonic centrality different from PageRank?
Harmonic centrality measures closeness to reachable nodes; PageRank estimates importance flowing through incoming links.
READ ANSWER →How is harmonic centrality different from closeness centrality?
Harmonic centrality sums reciprocal distances and handles unreachable nodes naturally; classic closeness centrality uses average distance and needs special handling for disconnected graphs.
READ ANSWER →What does directed harmonic centrality mean?
In a directed web graph, paths follow link direction. A domain’s score reflects the other nodes reachable by following outgoing edges from it.
READ ANSWER →What does Common Crawl harmonic centrality measure?
Common Crawl publishes precomputed harmonic centrality for host-level and domain-level graphs built from links found in its crawls.
READ ANSWER →Why does a domain have no harmonic centrality score?
A missing result usually means the domain was not represented in the imported graph release; it does not prove the live site is offline.
READ ANSWER →How does this harmonic centrality calculator work?
Enter a domain; the tool normalizes it and looks up its precomputed score and rank in the selected Common Crawl graph release.
READ ANSWER →Is this domain-level or page-level harmonic centrality?
This calculator returns Common Crawl’s domain-level score, where a node represents a registrable domain rather than a single URL.
READ ANSWER →What is a good harmonic centrality score?
There is no universal good score or threshold. Interpret a score with its graph release, rank, and the scope of the dataset.
READ ANSWER →How often is harmonic centrality updated?
A result changes when a new graph release is imported. Check the release and crawl period shown on the result; this calculator is not a live crawl.
READ ANSWER →Is harmonic centrality a Google ranking factor?
No. This is a graph metric computed from Common Crawl data, not a Google score or a confirmed Google ranking factor.
READ ANSWER →Can harmonic centrality help with AI Overviews and AI search engines?
It can be an exploratory signal for connectedness and entity discovery, but it is not a confirmed Google, ChatGPT, or Claude ranking factor.
READ ANSWER →A suggested reading path
Ready to look up a domain’s score and graph rank?
Open the harmonic centrality calculator →