Page Load Speed Leak Calculator
Turn slow load times into the sales you are quietly losing.
s
s
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$
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Studies cluster around 5–7% per second.Seconds recovered
2.5s
Current − target
Projected conversion
2.94%
from 2.50%
Extra conversions / mo
350
From the speed gain
Revenue recovered / mo
$42,000
$504,000/yr
Cutting load time from 4.5s to 2.0s could recover about $42,000/month — $504,000 a year. That's the revenue case to hand engineering for a Core Web Vitals sprint.
The per-second penalty is an industry average — it's steepest on mobile and for the first few seconds. Validate against your own analytics by load-time cohort.
About this calculator
Translate the gap between your current and target page load time into lost conversions and revenue, using a per-second conversion penalty — the business case for a speed fix.
Everything runs in your browser — nothing you type is sent anywhere or stored. Use it to sanity-check a plan, pressure-test a channel, or brief a team before you commit budget.