Put a Dollar Figure on Slow Pages

Site Speed Revenue Calculator

See how much revenue you lose each month because your pages load slowly. Enter your monthly sessions, your current and target load time, your conversion rate and your average order value. You get the extra revenue a faster site would bring in, based on a 7% conversion lift for every second you cut.

✓ Revenue you lose per month and per year
✓ Your current and projected conversion rate
✓ The lift stops at 6 seconds saved, so the number stays on the low side
✓ Sources listed on the page, no email needed
Step 1 of 5 Traffic

01 / Traffic

How many sessions does your store get a month?

Total monthly sessions across all channels, from your analytics. For example, 15,000.

How this is calculated

Slower pages convert fewer visitors. This tool assumes your conversion rate goes up about 7% for every second of load time you cut, up to 6 seconds. Past 6 seconds the effect gets weaker, so the tool stops there.

Revenue left on the table = (sessions × projected conversion rate × AOV) − (sessions × current conversion rate × AOV)

It's an estimate, not a promise. The real result depends on where your traffic comes from, how many visitors are on mobile and what is slowing your pages down.

Measure your own load time

The result is only as good as the load time you enter. Run your store through Google PageSpeed Insights and use the mobile Largest Contentful Paint (LCP) number. If the report shows data from real visitors, use that instead of the lab test.

Sources

  • Deloitte with Google, Milliseconds Make Millions

    Across 37 retail and travel brands, making mobile pages 0.1 seconds faster raised retail conversions 8.4% and average order value 9.2%. That's a much bigger effect than the 7% per second this tool uses, so the tool's numbers are on the low side.

    deloitte.com, Milliseconds Make Millions

  • Google, Core Web Vitals

    Google's measures for page experience, including Largest Contentful Paint (LCP), the load time this tool asks for.

    web.dev/articles/vitals

  • Google, Largest Contentful Paint

    Google's target is under 2.5 seconds for at least 75% of page loads. Step 3 links to it when you set your target.

    web.dev/articles/lcp

Sources last checked August 2026.

How much revenue a faster site adds

Each second cut from load time lifts conversion by about 7%. The table applies that to a store with 15,000 sessions a month, 1.8% conversion and a $65 average order.

Extra monthly revenue by load time cut (15,000 sessions/mo, 1.8% conversion, $65 AOV)
Seconds cutProjected conversionExtra monthly revenue
0.5s1.86%$614
1.0s1.93%$1,229
2.0s2.05%$2,457
3.0s2.18%$3,685
4.0s2.30%$4,914
5.0s2.43%$6,143

Need more than a free tool ?

Most audits tell you what's wrong and stop there. Ours don't. We find the issues and fix them. Book a 30-minute call with Shero to get a specific scope, timeline, and recommendation. No generic proposals.