B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
8.4%
8.4% -- conversion rate lift for Retail e-commerce conversions (mobile site) (2026)
A 0.1-second improvement in mobile site speed yields 8.4% more retail conversions according to Deloitte.
- Result associated with a 0.1-second improvement in mobile site speed
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Lighthouse Research Team
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Source verified
Evidence graded
Value
8.4%
Unit
Percentage
Data Vintage
2026
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)
Deloitte
Primary
Tier C
https://www.intellimark.net/pt-br/services/digital-experience ↗
Source Article
Digital Experience | Intellimark
Research · Customers & Employees
Digital Experience
Analytics comportamental para sites, web apps e mobile que mostram como os usuários de fato percorrem seu produto e onde o atrito custa conversões, além de suporte prático de UX e desenvolvimento para redesenhar fluxos e implementar as correções, p…
Also cited by
2026-09-23
Ascendly Marketing
https://ascendlymarketing.com/what-is-user-experience-a-guide-for-marketers/
2026-10-01
Original Research
Deloitte
· Original study ↗
Methodology
Agency service page citing Deloitte; stat refers to conversion gain from a 0.1-second improvement in mobile site speed. No date given in source, so collection year used per instructions; likely derived from Deloitte's 'Milliseconds Make Millions' study.
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Retail e-commerce conversions (mobile site): 8.4% conversion rate lift. Source: Deloitte (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/retail-mobile-speed-conversion-lift
HTML Embed
<blockquote cite="https://lighthousedata.io/data/retail-mobile-speed-conversion-lift" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>8.4%</strong> -- conversion rate lift for Retail e-commerce conversions (mobile site)<br><small>Source: Deloitte (2026) · <a href="https://lighthousedata.io/data/retail-mobile-speed-conversion-lift" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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