SEO Performance Diagnostic Calculator

Decode why your Google Search Console performance changed across impressions, clicks, CTR and average position. Identify whether the issue is ranking loss, CTR compression, AI Overview impact, paid ad pressure, query expansion, demand decline or Google update volatility.

Step 1 — Diagnosis mode

Quick mode generates a diagnosis from broad GSC metrics. Switch to Detailed to add query type, device, country, SERP features and known events for a more refined result.

Step 2 — Data view

Comparison type

Step 3 — Enter GSC data

Enter data for each segment. CTR is auto-calculated. Average position: lower number = better ranking. Brand and non-brand splits are optional but enable deeper cross-segment diagnosis.

Period 1 label

Period 2 label

Overall Performance

Previous Period

Current Period

Impressions

Clicks

Avg Position Lower number = better. E.g. position 3 is better than position 9.

Avg Position

CTR (auto)—

Brand Queriesoptional

Previous Period

Current Period

Impressions

Clicks

Avg Position Lower number = better. E.g. position 3 is better than position 9.

Avg Position

CTR (auto)—

Non-Brand Queriesoptional

Previous Period

Current Period

Impressions

Clicks

Avg Position Lower number = better. E.g. position 3 is better than position 9.

Avg Position

CTR (auto)—

Enter your GSC data to get a diagnosis

Choose Quick or Detailed mode, select your data view, and enter your Google Search Console metrics. The diagnostic engine will identify the pattern and recommend what to investigate.

Try the sample dataClick “Load sample data” to see a diagnosis instantly with a pre-built New Query Expansion scenario.

How to Use This Calculator

This tool uses Google Search Console metric relationships to identify likely SEO performance patterns. It compares impressions, clicks, CTR and average position, then layers optional context — query type, device, country, SERP features, AI Overview presence, paid ad pressure, Google update timing and known site changes — to refine the diagnosis.

STEP 01

Choose Quick or Detailed mode

Quick mode works with just your core GSC numbers. Detailed mode unlocks context fields — query type, device, country, AI Overview, paid ads and known events — that materially improve diagnostic accuracy.

STEP 02

Select two-period or trend view

Two-period comparison is ideal for MoM, QoQ or WoW analysis. Trend view reveals sustained patterns — sustained click decline, CTR compression, visibility dilution or volatility — that a single comparison misses.

STEP 03

Enter your GSC data directly

Copy your numbers from Google Search Console's Performance report. CTR is auto-calculated. Average position: lower is better — a move from 5 to 8 is a worsening of 3 positions.

STEP 04

Add optional context for higher confidence

Every context field you add improves diagnosis precision. AI Overview presence, paid ads pressure and Google update timing are the highest-value fields to set in Detailed mode.

STEP 05

Read severity and confidence scores

Severity measures how significant the performance change is across all signals. Confidence measures how precisely the available data points to one specific diagnosis. Low confidence means the pattern is real but multiple causes are plausible.

STEP 06

Use recommended checks as your investigation queue

Each diagnosis produces a prioritised list of GSC checks. Start with the first recommended check before acting. Investigate before changing — many SEO mistakes come from acting on incomplete diagnosis.

Methodology & Disclaimer: This calculator provides directional diagnosis based on GSC metric relationships and selected context. It does not replace a full SEO audit. Final interpretation should be validated inside Google Search Console by reviewing queries, pages, devices, countries, search appearances and live SERPs.

Need a deeper diagnostic on your GSC performance?

This calculator shows you the pattern. Search Indicators helps you validate the cause, build a prioritised fix list, and connect your GSC performance to revenue outcomes.

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