GreenCalculus

GHG Inventory Aggregator — Scope 1 + 2 + 3

The capstone of a corporate carbon inventory: roll up the three scopes into one auditable total. Because Scope 2 is reported two ways, the inventory carries two grand totals — location-based = S1 + S2(location) + S3 and market-based = S1 + S2(market) + S3. Enter your subtotals, pick the headline basis, and see the scope split — including how much of your footprint sits in the value chain.

GHG Protocol Corporate Scope 1 + 2 + 3 Dual totals Vanilla JS

Inputs · tCO₂e

Scope 1 — direct
Combustion, mobile, fugitive / refrigerants.
Scope 2 — purchased energy
After EACs / PPAs. Often lower than location-based.
Scope 3 — value chain
Headline reporting basis

Consolidated inventory

Total — location-based
—
Total — market-based
—

Build each scope first

This aggregator consolidates the outputs of the per-scope calculators. Use these demos to produce each subtotal, then bring them back here — or run the full tool on GreenCalculus.com, which pulls every category straight from your activity data.

🔥 Scope 1 · Combustion→ ⚡ Scope 2 · Electricity→ ✈️ Scope 3 · Value chain→
Why Scope 3 usually dominates: For most companies the value chain is 70–90% of the total footprint — which is why the split bar matters more than any single number. The two grand totals differ only in the Scope 2 line: location-based reflects the grid, market-based reflects your energy contracts, and the same Scope 1 and Scope 3 flow into both. Disclosure frameworks (CSRD/ESRS E1, SECR, IFRS S2, CDP) expect this consolidated inventory with the dual Scope 2 totals shown — the live aggregator emits it with full audit trails and schema-aligned exports.

Related on GreenCalculus.com

The methodology, standards, definitions and related tools behind this calculator — all live on the platform.

Methodology
GHG Inventory Aggregator↗
Standards
GHG Protocol Corporate Standard↗ Scope 2 Guidance↗ Scope 3 Standard↗ ISO 14064-1↗
Glossary
Scope 1 emissions↗ Scope 2 emissions↗ Scope 3 emissions↗ CO₂e↗ Operational control↗ Global warming potential↗
Related calculators
Scope 1 Combustion↗ Scope 2 Electricity↗ Scope 3 Business Travel↗ ISO 14064-1 Inventory↗