B
Evidence Grade B
Graded
under review
Safe to Cite
Recent
28%
28% -- percentage of workweek spent on email for knowledge workers (2025)
Attribution:
View source
Lighthouse Research Team
Last verified:
·
How we verify data →
Source verified
Evidence graded
Value
28%
Unit
Percentage
Data Vintage
2025
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
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
McKinsey
Primary
Tier C
https://summry.io/pl/blog/too-many-newsletters ↗
Source Article
Subskrybujesz 50 newsletterów? Oto jak je faktycznie przeczytać
Badanie Mailbird z 2024 roku przeprowadzone wśród 250+ profesjonalistów wykazało, że przeciętny pracownik wiedzy dostaje od 50 do 100 maili dziennie. Niektórzy raportowali 150+. Średni open rate newsletterów w 2024 roku wynosił około 40% według GetResponse. Czyli 60% tego, co subskrybujesz, pozostaj…
Original Research
McKinsey
· Original study ↗
Methodology
McKinsey figure cited via blog article
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
knowledge workers: 28% percentage of workweek spent on email. Source: McKinsey (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/workweek-time-on-email
HTML Embed
<blockquote cite="https://lighthousedata.io/data/workweek-time-on-email" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>28%</strong> -- percentage of workweek spent on email for knowledge workers<br><small>Source: McKinsey (2025) · <a href="https://lighthousedata.io/data/workweek-time-on-email" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
Share
Use this data in your work
Copy the citation, embed the widget, or explore thousands more verified marketing statistics -- all free.