Core Web Vitals Calculator

Assess your page performance against Google's standards

Largest Contentful Paint (LCP)

LCP Time (seconds)

Time when the largest visible content element appears

Good: ≤ 2.5s

Fair: 2.5 - 4.0s

Poor: > 4.0s

Interaction to Next Paint (INP)

INP Time (milliseconds)

Longest interaction delay on the page

Good: ≤ 200ms

Fair: 200 - 500ms

Poor: > 500ms

Cumulative Layout Shift (CLS)

CLS Score (0 - 0.25)

Sum of all unexpected layout shifts

Good: ≤ 0.1

Fair: 0.1 - 0.25

Poor: > 0.25

Overall Assessment

Largest Contentful Paint

Pass

Interaction to Next Paint

0ms

Pass

Cumulative Layout Shift

Pass

Metric	Your Score	Good Threshold	Difference
LCP	-	≤ 2.5s	-
INP	-	≤ 200ms	-
CLS	-	≤ 0.1	-

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