Measurement / calculator / Free to use
Search Index Coverage Calculator: Intended Pages and Unknown Status
Calculate verified index share and observation coverage for a frozen canonical inventory, keeping legitimate variants and unknown status separate.
Growthcraft Editorial · 2026-10-27. AI-assisted research and implementation. Examples are synthetic; Akshay's personal review is not claimed.
Enable JavaScript to change inputs in the interactive calculator. The complete formulas, default example and limitations are available below.
A defined inventory, not dashboard subtraction
Enter counts only after joining URL-level evidence to a deduplicated intended inventory for one engine and compatible observation window. The tool cannot infer missing URLs from a sitemap total minus a Search Console total. The two reports may cover different populations.
Definitions and formulas
N=intended canonical pages; I=confirmed indexed; U=confirmed not indexed; X=N−I−U unknown; V=intentional variants outside N. Confirmed share = 100 × I/N; observation coverage = 100 × (I+U)/N; possible upper = 100 × (I+X)/N. All percentages are undefined at N=0. Inputs must be whole counts up to one billion, with I+U≤N.
Known answer
With N=100, I=65, U=20 and V=30, X=15, confirmed share 65%, observation coverage 85%, possible upper 80%. Changing V to 300 leaves every rate unchanged. Classifying five unknown pages as indexed gives I=70, U=20 and X=10: confirmed 70%, observed 90%, upper 80%. That is improved evidence, not necessarily five newly indexed pages.
Interpretation limits
The range is a deterministic missing-status bound. It does not model future indexing, report lag, stale classifications or ranking probability. Incorrect URL matching invalidates it. Zero unknowns do not imply every page is useful or commercially valuable. Use the triage worksheet for decisions.
Sources and boundaries
Checked October 27, 2026. Google Page indexing documentation distinguishes legitimate exclusions and limits on example lists. Bing's URL Inspection introduction (September 2020) distinguishes indexed evidence and live checks. These sources support the diagnostic distinction, not this original worksheet or its synthetic numbers. No engine access, submission or indexing promise is included.