B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Aging
1%
1% -- conversion rate lift per 100ms load improvement for E-commerce website conversion rate (2024)
A 100ms improvement in page load time correlates with a 1% increase in conversion rate.
- Secondary citation referencing a 2024 Deloitte study without additional methodology details
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Lighthouse Research Team
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Source verified
Evidence graded
Value
1%
Unit
Percentage
Data Vintage
2024
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 (2)
Deloitte
Primary
Tier C
https://forgecro.com/shopify-headless-commerce-pros-and-cons-4/ ↗
Source Article
Shopify Headless Commerce: 12 Pros, Cons & Decisions (2026) - forgecro.com
Shopify Headless Commerce: 12 Pros, Cons & Critical Decisions (2026)
Your Shopify store is growing fast — and your current theme is starting to feel like a ceiling. You’ve heard that Shopify headless commerce unlocks unlimited frontend flexibility, but nobody tells you it also unlocks unlimited comp…
Also cited by
Original Research
Deloitte
· Original study ↗
Methodology
Article states a 100ms improvement in page load time correlates with a 1% increase in conversion rate, attributed to Deloitte, 2024. Original Deloitte study not identified.
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
E-commerce website conversion rate: 1% conversion rate lift per 100ms load improvement. Source: Deloitte (2024). Via Lighthouse Intelligence -- https://lighthousedata.io/data/page-load-100ms-conversion-lift-deloitte
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<blockquote cite="https://lighthousedata.io/data/page-load-100ms-conversion-lift-deloitte" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>1%</strong> -- conversion rate lift per 100ms load improvement for E-commerce website conversion rate<br><small>Source: Deloitte (2024) · <a href="https://lighthousedata.io/data/page-load-100ms-conversion-lift-deloitte" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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