INP (Interaction to Next Paint)
A Core Web Vital that measures responsiveness—how quickly the interface updates after user input across the page’s lifecycle.
Interaction to Next Paint (INP) is a Core Web Vital that evaluates responsiveness by looking at the latency of interactions (clicks, taps, key presses) and the time until the next visual update. Unlike FID, which sampled the first input, INP reflects overall responsiveness, making it a truer measure of UX for interactive pages. It matters because slow responses increase frustration, reduce conversions, and can weaken page experience signals. INP influences JS execution strategy, main-thread scheduling, and UI patterns such as heavy modals or complex menus.
- Reduce long tasks and main‑thread blocking
- Prioritize input responsiveness over cosmetic animations
- Context
A pricing page uses heavy client-side calculators.
- Action
Engineers chunk long tasks, add interaction-ready priorities, and minimize third‑party scripts.
- Result
INP improves from 380ms to 180ms; trial signups increase due to smoother interactions.
Knowing the term is not the same as ranking for it
Book a free 30-minute call. We will go through where your visibility stands today, which tier fits, and what to expect by Month 3 and Month 6.