Quantify enabled and missed emissions beyond Scope 1–3.

This engine provides conservative decision-support estimates designed to sit next to Scope 1–3 accounting, not inside it.

Methodology

Before you use the engine

Please enter your name and email. Your inputs and results are calculated locally in your browser.

Choose your Scope 4 lens

Estimates emissions avoided beyond your boundary due to your product, service, or technology. Use conservative baselines and transparent boundaries.

Step 1 — Baseline & solution intensity

Baseline emissions intensity

Example: kg CO₂e per 1,000 wash cycles (define your functional unit clearly).

Solution emissions intensity

Should be measured using the same boundaries and functional unit as baseline.

Step 2 — Adoption scale

Units deployed

Annual functional units per deployed unit

Step 3 — Attribution & conservatism

Attribution share

0%70%100%

If savings are shared (technology + behavior), attribute conservatively.

Conservatism factor

30%70%100%

Default is conservative. Increase only if you have strong validation.

Estimates preventable emissions that persist due to delayed or unimplemented efficiency opportunities. Choose a quantified pathway or a conservative diagnostic estimate.

Step 1 — Quantify the opportunity

Annual wasted resource

Example: kWh/year, m³/year, liters/year (choose a consistent unit).

Emission factor

Example: grid intensity kg CO₂e/kWh (country-specific).

Step 2 — Delay & likelihood

Delay duration

Implementation probability

0%60%100%

Step 3 — Conservatism

Conservatism factor

30%50%100%

Default is conservative to reduce over-claiming.

Resource unit label (optional)

Methodology (high level)

Scope 4A Enabled Emissions: Avoided emissions beyond your organizational boundary enabled by your product/service/technology. Use clear functional units, transparent boundaries, and conservative attribution.
Scope 4B Opportunity Emissions: Emissions that persist due to delayed or unimplemented efficiency opportunities. Estimates are conservative and intended for governance and prioritization.

Note: “Scope 4” is not formally defined under the GHG Protocol. This tool provides decision-support estimates designed to sit alongside (not replace) Scope 1–3 reporting.

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