Core Web Vitals Predictor
Core Web Vitals are the three metrics Google uses to summarise loading, visual stability and responsiveness: LCP, CLS and INP. Enter numbers from Lighthouse, PageSpeed Insights or field data to see which pass, which need work and how far each is from the threshold.
Reading the metrics
LCP (Largest Contentful Paint) should reach 2.5 s or less; it reflects when the main content appears. CLS (Cumulative Layout Shift) should stay at or below 0.1; it counts unexpected movement after load. INP (Interaction to Next Paint) should stay at or below 200 ms; it measures how quickly the page responds to taps and keys.
TTFB and FCP are diagnostics, not Core Web Vitals. A slow TTFB usually drags LCP down, and a late FCP points at render-blocking resources. Lab and field data can disagree, so use this as triage and confirm with real-user monitoring.
Measurements
This tool runs entirely in your browser. Your inputs and files are processed locally and are never sent to or stored on Kinetikatech servers.
Related pages
Server problem? Hacked site? Slow website?
Critical issues answered within 30 minutes, 24 hours a day, 7 days a week.