B
Evidence Grade B
Graded
under review
Safe to Cite
Current
8%
8% -- conversion rate lift from 0 1s speed improvement for website performance / ecommerce conversion (2026)
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
8%
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.
Single source - not yet corroborated
Score breakdown
Extraction
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Deloitte
Primary
Tier B
https://www.knechtstrategies.com/core-web-vitals-2026-what-changed-why-it-matters-and-what-to-do-nex… ↗
Source Article
Mastering Core Web Vitals 2026: Key Strategies for Optimal Performance
This guide is for marketing directors, IT leaders, and web managers who need to understand how Google’s March 2026 Core Web Vitals update will impact their website’s rankings, revenue, and competitive position. Understanding Core Web Vitals in 2026 is critical because Google’s latest update fundamen…
Original Research
Deloitte
· Original study ↗
Methodology
Cited from Deloitte's 'Milliseconds Make Millions' study on mobile site speed and conversion impact
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
website performance / ecommerce conversion: 8% conversion rate lift from 0 1s speed improvement. Source: Deloitte (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/deloitte-01s-speed-conversion-lift
HTML Embed
<blockquote cite="https://lighthousedata.io/data/deloitte-01s-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%</strong> -- conversion rate lift from 0 1s speed improvement for website performance / ecommerce conversion<br><small>Source: Deloitte (2026) · <a href="https://lighthousedata.io/data/deloitte-01s-speed-conversion-lift" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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