OMAKAASE
Free Tool

Website Revenue Loss Calculator

Find out how much your slow website is costing you every single month — and what fixing it could be worth.

✓ Based on Google's 7%/s research✓ Free, no account needed✓ Results in 30 seconds

Your website metrics

Adjust the sliders to match your current site performance.

4.5s
1.0s10.0s

Check yours at pagespeed.web.dev — look for 'Time to Interactive'

10,000
1,000500,000

Total monthly sessions from Google Analytics or similar

2.5%
0.5%10.0%

% of visitors who buy or submit a lead form

$500
$50$5,000

Average revenue or value per conversion

Speed benchmark

Excellent: < 2sGood: 2–3sNeeds work: 3–5sPoor: > 5s

Revenue impact estimate

Monthly Revenue Lost

$27K

due to 2.5s over ideal load time

Annual Revenue Lost

$318K

Conv. Rate Uplift at 2s

+0.4%

"Your site loads in 4.5s — that's 2.5s slower than Google's recommended 2s. This single issue is costing you an estimated $27K per month in lost conversions."

Revenue comparison

Current monthly revenue

$125K

Potential at 2s load time

$152K

Current conversion rate: 2.5% → At 2s: 2.5% (your adjusted rate: 2.1%)

⚡ Fix your site speed

Our web team can typically move a site from 4–6s to under 2s in 2–3 weeks.

Get a web performance audit →

Want us to fix your site speed?

Our web team specialises in Core Web Vitals optimisation and performance sprints. Most sites go from 4–6s to under 2s in 2–3 weeks.

Load time vs. estimated conversion rate penalty

Load TimeConversion PenaltyStatus
1s0%Excellent
2s0%Ideal target
3s~7%Acceptable
4s~14%Needs improvement
5s~21%Poor
6s~28%Very poor
8s~42%Critical
10s~56%Critical

Source: Google, Deloitte Digital, and Portent research. Penalties are estimates — actual impact varies by industry and audience.

How the calculation works

The calculator applies Google's research showing each 1-second delay reduces conversions by ~7%, relative to the 2-second ideal load time benchmark.

1

Penalty factor

We calculate your speed penalty: (currentLoadTime − 2) × 7%. A 5s site has a 21% penalty. A 3s site has a 7% penalty. Sites at 2s or faster have no penalty.

2

Revenue comparison

We calculate your current monthly revenue (visitors × conversion rate × avg value), then calculate what you'd earn at a 2s load time using your penalty-adjusted conversion rate.

3

Monthly loss

The difference between potential revenue (at 2s) and actual revenue (at current speed) is your monthly speed-related revenue loss. Multiply by 12 for the annual figure.

Frequently asked questions

About website speed, revenue impact, and how to fix performance issues.

How much does website speed affect conversions?▾
Google's research found that each additional second of load time reduces conversions by approximately 7%. Amazon calculated that 100ms of latency costs them 1% in sales. A study by Deloitte found that improving mobile site speed by 0.1s increased conversions by 8.4% in the retail sector. The impact is consistent and measurable — slow sites cost money.
What is a good website load time?▾
Google recommends a Largest Contentful Paint (LCP) of under 2.5 seconds. For conversions, sub-2 second total page load is the sweet spot. Anything over 3 seconds sees a significant drop-off: 40% of visitors abandon a page that takes more than 3 seconds to load on mobile. Check your real load time at PageSpeed Insights (pagespeed.web.dev).
How do I measure my actual page load time?▾
Use Google PageSpeed Insights (free) to get your LCP, FID, and CLS scores. For more detailed data, try GTmetrix or WebPageTest.org. Look at the "Time to Interactive" and "Total Blocking Time" metrics — these most closely correlate with user behaviour and conversion rates. Always test on mobile as well as desktop.
What causes a slow website?▾
The most common causes are: unoptimised images (the biggest culprit), render-blocking JavaScript, no content delivery network (CDN), slow server response times, excessive third-party scripts (chat widgets, analytics, ads), and lack of browser caching. A good web developer can audit and fix most of these within 1–2 weeks.
Can improving site speed help SEO?▾
Yes — page speed is a confirmed Google ranking factor and has been since 2010 (desktop) and 2018 (mobile). Core Web Vitals (LCP, FID, CLS) are part of Google's Page Experience signal. Faster sites also reduce bounce rate, which sends positive engagement signals to Google. Improving speed has a double benefit: more traffic AND better conversion of that traffic.
How long does it take to fix website speed issues?▾
Basic optimisations (image compression, caching, CDN setup) can be done in 1–3 days and often improve scores significantly. More complex fixes (code refactoring, JavaScript optimization, server migration) take 1–4 weeks. A specialist web developer can typically move a site from 4–6 seconds to under 2 seconds with a focused performance sprint.
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