RUMvision - Core Web Vitals monitoring

Most “speed = revenue” claims are inflated. We think so too. That’s why our free calculator has a skepticism slider. Set it to “barely” and see what slow pages still cost you. Even the conservative number is usually worth acting on. Tired of case studies promising +20% revenue from a faster site? Same. Our calculator lets you dial the assumptions down until you believe the number. Then take that conservative estimate to your stakeholders.

Your analytics show every order you got. Not one of the orders you lost to slow loading, laggy taps, or jumping layouts. Two inputs, thirty seconds: see your missed revenue over the last 28 days.

A release goes live on Thursday. The site gets 0.5 s slower. Revenue starts dropping, and nobody notices. Google’s data runs on a 28-day window, so by the time the dip shows up, you’ve lost weeks of sales. Calculate what that blind window costs you.

“LCP improved by 800 ms” gets a nod. “+€6,540 per month” gets budget. Translate your Core Web Vitals wins into revenue with our free calculator, and make the business case for your next technical sprint.

All green in Search Console doesn’t mean your site is fast. 2.5 s is Google’s pass mark, not the point where shoppers stop leaving. Every 100 ms can cost around 3.5% in conversions. Find out what the gap between “passing” and “fast” is worth for your store.

GDG Groningen, de Groningse Google Developer Community, organiseert op woensdag 7 oktober State of Web Performance 2026 bij New Nexus in Haren. Google Developer Expert Erwin Hofman en Karlijn Löwik (CEO - RUMvision) laten zien wat de metrics vandaag echt zeggen over de gebruikerservaring, hoe real-user data blootlegt welke third parties je site vertragen, en hoe je via MCP direct antwoord krijgt op je performancedata om je website-ervaring en omzet te verbeteren. Voor e-commerce-eigenaren, publishers, webbouwers en webagencies.