B Evidence Grade B Graded under review Safe to Cite Dated

90%

90% -- bounce rate increase for Google (site load speed) (2018)

Name: Bounce Rate Increase Statistics
Creator: Lighthouse Intelligence
Published: 2026-09-18

2018 · Google

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Attribution: Google View source

Lighthouse Research Team

Last verified: 2026-09-18 · How we verify data →

Source verified Evidence graded

Value

90%

Unit

Percentage

Data Vintage

2018

Entity

Google (site load speed)

Evidence Quality

Strong, reliable evidence

Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.

60/100 confidence

Single source - not yet corroborated

Score breakdown

Extraction

Source Trust

Citation Chain

Independence

Methodology

Freshness

Source

Google Primary Tier B

https://ipullrank.com/seo-vs-cro-which-should-be-your-primary-focus ↗

Confidence: 53/100 Vintage: 2018 Channel: Deep Crawl

Source Article

SEO vs CRO: Which Should be Your Primary Focus? - iPullRank

When looking to improve your site’s performance, there are two areas that you can turn to. While SEO (search engine optimization) and CRO (conversion rate optimization) focus on two different objectives when trying to improve a website’s overall performance the two go hand-in-hand. Two Abbreviations…

Original Research

Google · Original study ↗

Methodology

Google research cited by iPullRank: 5-second load time increases bounce probability by 90%

Methodology documented

Segmentation

Industrymarketing

Cite this stat

Plain Text

Google (site load speed): 90% bounce rate increase. Source: Google (2018). Via Lighthouse Intelligence -- https://lighthousedata.io/data/site-speed-5s-bounce-increase

HTML Embed

<blockquote cite="https://lighthousedata.io/data/site-speed-5s-bounce-increase" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>90%</strong> -- bounce rate increase for Google (site load speed)<br><small>Source: Google (2018) · <a href="https://lighthousedata.io/data/site-speed-5s-bounce-increase" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>

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