AVAILABLE FOR WEB, FLUTTER & QA PROJECTS
How to use this tool
1. Enter Catalog Size
Input total indexable pages, new pages published per month, and update frequency.
2. Set Server Performance
Enter your average Time To First Byte (TTFB in milliseconds) and server concurrency limit.
3. Configure Crawl Waste Factors
Estimate faceted navigation parameters, redirect hops, and 404 error frequency.
4. Review Crawl Health Score
Inspect estimated daily Googlebot requests, crawl coverage ratio, and recommended server optimizations.
Formula or logic used
Crawl Capacity & Crawl Demand Mathematics
Crawl budget is a function of Crawl Demand (how much Google wants to crawl based on popularity and freshness) and Crawl Rate Limit (how much your server can handle without slowing down).
Server Crawl Capacity (requests/sec) ≈ 1000 / (Average TTFB in ms + Network Overhead)Daily Crawl Budget ≈ Capacity × Active Crawl Window (seconds/day) × Server Concurrency FactorMonthly Crawl Demand = (Total Pages × Recrawl Rate) + (New Pages/Month × Discovery Multiplier)Crawl Waste (%) = (Faceted URLs + Redirect Hops + 404s) / Total Crawled URLs × 100Health Threshold: Sites with TTFB < 200ms achieve 3x to 5x higher crawl capacity than sites with TTFB > 800ms.
Examples
Example 1: Fast Next.js 50,000-Page Directory
Fast server response allows Googlebot to re-crawl updated content frequently without server strain.
Example 2: Slow 250,000-SKU E-Commerce Store
Server bottlenecks and faceted URL traps waste crawl budget, leaving hundreds of products unindexed.
Common use cases
Large E-Commerce Catalog Auditing
Diagnose why newly added products take weeks to appear in Google search results.
Server TTFB Optimization ROI
Quantify the direct crawl capacity benefits of moving from shared hosting to edge-cached serverless infrastructure.
Faceted Navigation Control
Calculate how many Googlebot requests will be saved by adding canonical tags and robots.txt disallow rules to query filters.
Post-Migration Re-indexing Sizing
Estimate how long it will take Googlebot to process 301 redirects across a domain rebrand.
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Frequently asked questions
What is crawl budget in SEO?
Crawl budget is the number of pages search engine crawlers (such as Googlebot) can and want to crawl on your website within a given timeframe. It is determined by your server's speed and stability (crawl rate limit) and your website's overall authority and update frequency (crawl demand).
Does a small website need to worry about crawl budget?
Generally, no. Websites with fewer than 10,000 pages rarely encounter crawl budget limitations unless their server is exceptionally slow (TTFB > 2-3 seconds) or they generate infinite URL loops through faceted navigation.
How does server response time affect crawl budget?
Googlebot dynamically adjusts its crawl speed based on your server's responsiveness. If your server responds in under 200ms, Googlebot increases its crawl concurrency. If your server slows down or returns 5xx errors, Googlebot throttles down to prevent overloading your site.
What are the biggest causes of crawl waste?
The top causes of crawl waste are faceted navigation query strings, redirect chains (multiple 301 hops), soft 404 errors, duplicate content, internal broken links, and dynamically generated calendar pages.
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