Free calculator
Website Speed Calculator
Updated Sep 4, 2026A site loading in 4 seconds instead of 1 typically loses $960–$2,400/month in revenue at 5,000 visitors/month and a 2% conversion rate — $11,500–$28,800/year. Enter your own traffic and conversion numbers below for your actual figure.
Estimate how much a slow-loading site is actually costing you in lost revenue each month.
Current homepage load time
Monthly visitors
Current conversion rate
Value per conversion
Estimated revenue lost
Based on a commonly cited 4–10% conversion drop per extra second of load time — an industry rule of thumb, not a guarantee for your site.
How this estimate works
Every second your site takes beyond a 1-second load time is applied against a commonly cited 4–10% conversion-rate drop per second, then multiplied by your current monthly revenue (visitors × conversion rate × value per conversion). See web development for how a rebuild gets to that 1-second baseline, or AI-agentic website development if the slow site is still on WordPress.
Frequently asked questions
Where does the 4–10% figure come from?
It's a commonly cited range from published conversion-rate studies (Portent, Akamai, and Google/SOASTA research all land in and around this band) — an industry rule of thumb, not a measurement of your specific site.
Why 1 second as the target?
That's the bar we build to — see the web development service. It's achievable for most marketing sites and stores with a proper rebuild, not a theoretical best case.
How do I find my current load time?
Run your homepage through Google PageSpeed Insights or a similar tool and use the "Largest Contentful Paint" number — that's the closest proxy for when a visitor feels the page has loaded.
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