Observed activity
Provider metadata, duration, role, mode, or quality signals where available.
Methodology
A result is only as credible as its boundary.
Understand what is observed, what is assumed, what is modeled, and how uncertainty follows the calculation.
Data estimate
Published requirements or observed transfer, with a documented fallback.
Energy estimate
A versioned electricity-intensity factor appropriate to the boundary.
Grid factor
Location-aware carbon intensity where justified; conservative fallback otherwise.
CO₂e estimate
A modeled result with sources, scope, and uncertainty still attached.
Reading the labels
Not every number means the same thing.
Published directly by a provider or research organization.
A representative input used in an external modeled organization.
Calculated by Data Offset from cited inputs and stated boundaries.
A forward-looking estimate—not a measured outcome.
Primary source register
Trace the claims.
International Energy Agency
2026ProjectionKey Questions on Energy and AI
Global data-center electricity demand in 2025 and 2030.
Open ↗Zoom Video Communications
2020ReportedZoom Analyst Day at Zoomtopia
Historical 3.3 trillion annualized meeting-minute run rate.
Open ↗Zoom Support
CurrentReportedSystem and bandwidth requirements
Recommended bandwidth by meeting mode and quality.
Open ↗Deloitte Global
2025Reported2025 C-suite Sustainability Report
Enterprise sustainability investment and priority findings.
Open ↗Forrester Consulting
2025Composite assumptionProjected TEI of Microsoft Teams with Microsoft 365 Copilot
Representative meeting frequency for a modeled enterprise user.
Open ↗What is not measured
Privacy is part of the system boundary.
Meeting recordingsMessage contentPrompts and responsesEmail bodiesStored file contentsPrivate conversations