INP (Interaction to Next Paint)

DefinitionINP measures how quickly a page responds visually to clicks, taps and key presses across a visit. Good is 200 milliseconds or less.

INP replaced First Input Delay (FID) as a Core Web Vital in March 2024. Slow INP usually comes from long JavaScript tasks blocking the main thread, such as heavy third-party scripts or large framework updates on each interaction.

Learn it step by step

• Monitor Core Web Vitals (SEO audits)

Related terms

• Core Web Vitals: Core Web Vitals are Google's three user-experience metrics for loading (LCP), responsiveness (INP) and visual stability (CLS), measured on real visits.
• LCP (Largest Contentful Paint): LCP measures how long it takes for the largest image or text block in the viewport to appear. Good is 2.5 seconds or less.
• CLS (Cumulative Layout Shift): CLS measures how much visible content unexpectedly moves while a page is in use. Good is 0.1 or less.