B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
40%
40% -- visitor loss rate slow loading pages for websites with load times over 3 seconds (2025)
Web pages taking longer than 3 seconds to load lose 40% of visitors before loading.
Attribution:
View source
Lighthouse Research Team
Last verified:
·
How we verify data →
Source verified
Evidence graded
Value
40%
Unit
Percentage
Data Vintage
2025
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
BrowserStack
Primary
Tier B
https://wellsgroup.uz/en/insights/how-professional-web-design-for-businesses-builds-trust-and-drives… ↗
Source Article
How Web Design Builds Trust & Growth | WellsGroup
How Professional Web Design for Businesses Builds Trust and Drives Real Growth
Learn how professional web design builds trust, improves conversions, strengthens SEO, and turns website visitors into customers.
A potential customer lands on your website. Within three seconds, they've already decided w…
Original Research
BrowserStack
· Original study ↗
Methodology
BrowserStack, 2025
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
websites with load times over 3 seconds: 40% visitor loss rate slow loading pages. Source: BrowserStack (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/slow-load-visitors-lost-40
HTML Embed
<blockquote cite="https://lighthousedata.io/data/slow-load-visitors-lost-40" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>40%</strong> -- visitor loss rate slow loading pages for websites with load times over 3 seconds<br><small>Source: BrowserStack (2025) · <a href="https://lighthousedata.io/data/slow-load-visitors-lost-40" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
Share
Use this data in your work
Copy the citation, embed the widget, or explore thousands more verified marketing statistics -- all free.