Core Web Vitals checker Enter your LCP, INP and CLS values to see whether your page passes Google's Core Web Vitals - rated against the official good / needs-improvement / poor thresholds (at the 75th percentile).
LCP - Largest Contentful Paint Loading: how fast the main content appears.
s
Good / Needs improvement / Poor thresholds: ≤ 2.5s / ≤ 4s / > 4s
INP - Interaction to Next Paint Interactivity: how fast the page responds to input.
ms
Good / Needs improvement / Poor thresholds: ≤ 200ms / ≤ 500ms / > 500ms
CLS - Cumulative Layout Shift Visual stability: how much the layout shifts.
Good / Needs improvement / Poor thresholds: ≤ 0.1 / ≤ 0.25 / > 0.25
What the thresholds mean Google's Core Web Vitals use three metrics, each with public thresholds measured at the 75th percentile of real-user data:
LCP - Loading: how fast the main content appears. ≤ 2.5s good, ≤ 4.0s needs improvement.INP - Interactivity: how fast the page responds to input. ≤ 200ms good, ≤ 500ms needs improvement.CLS - Visual stability: how much the layout shifts. ≤ 0.1 good, ≤ 0.25 needs improvement.Thresholds source: Google web.dev. This tool rates the numbers you enter; it does not measure your site.