B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Dated
90%
90% -- bounce probability increase for Website visitors on sites taking 5 seconds to load (vs 1 second) (2018)
In a 2018 study by Think with Google, the probability of a bounce increases to 90% if a site takes more than 5 seconds to load.
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
90%
Unit
Percentage
Data Vintage
2018
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.
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Sources (3)
Think with Google
Primary
Tier C
https://cubecreative.design/blog/private-school-marketing/private-school-website-speed-matters-how-t… ↗
Source Article
Is Your Slow Private School Website Costing You Admissions? Here's How to Fix It
Imagine this: You're the admissions director at Greenfield Academy, a prestigious private school known for its innovative curriculum and state-of-the-art facilities. You've spent months perfecting your website, showcasing your school's unique offerings, and encouraging prospective families to apply.…
Also cited by
Little Green Agency
https://littlegreenagency.co.uk/blog/how-to-reduce-bounce-rate-on-website/
2026-09-19
TIS Digitech (tisdigitech.com)
https://www.tisdigitech.com/blog/make-website-click-worthy/
2026-09-15
Original Research
Think with Google
· Original study ↗
Methodology
Think with Google page speed study: probability of bounce increases 90% when mobile site load time goes from 1 to 5 seconds; cited secondhand in blog article
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Website visitors on sites taking 5 seconds to load (vs 1 second): 90% bounce probability increase. Source: Think with Google (2018). Via Lighthouse Intelligence -- https://lighthousedata.io/data/bounce-probability-increase-5s-page-load
HTML Embed
<blockquote cite="https://lighthousedata.io/data/bounce-probability-increase-5s-page-load" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>90%</strong> -- bounce probability increase for Website visitors on sites taking 5 seconds to load (vs 1 second)<br><small>Source: Think with Google (2018) · <a href="https://lighthousedata.io/data/bounce-probability-increase-5s-page-load" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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