Free to try · CSRD · ESRS E1

Calculate your GHG emissions for CSRD

Estimate Scope 1, 2 (location + market-based), and Scope 3 emissions using DEFRA 2023 and IEA 2023 factors — with transparent, auditable output aligned to ESRS E1.

All 3 scopes
Dual Scope 2
DEFRA 2023 factors
ESRS E1 output

Based on: Directive 2003/87/EC — EU ETS ↗

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Free to try · CSRD · ESRS E1

GHG Emissions Estimator

Calculate your Scope 1, 2, and 3 greenhouse gas emissions using DEFRA 2023 and IEA 2023 factors — with transparent, auditable output aligned to ESRS E1.

🔒 Your data stays in your browser. All calculations run locally — no emissions data is sent to or stored on our servers.
ℹ️ Results are estimates using DEFRA 2023 & IEA 2023 factors. For regulatory reporting, verify with a qualified professional.

Free account required · No data is stored on our servers

1
Company
2
Scope 1
3
Scope 2
4
Scope 3
Step 1 of 4 — Company Profile

Tell us about your company

Your profile helps pre-select the most material Scope 3 categories for your sector and calibrate ESRS E1 intensity metrics.

Step 2 of 4 — Scope 1

Direct emissions

Emissions from sources owned or controlled by your organisation. Factors from DEFRA 2023 (kgCO₂e per unit).

A — Stationary combustion (heating, boilers, generators)
Enter fuel type and quantity. If you don't use a fuel type, leave it out.
B — Mobile combustion (company-owned vehicles)
C — Fugitive emissions (refrigerants)
Enter the annual top-up quantity of refrigerant for your air conditioning and refrigeration systems.
Step 3 of 4 — Scope 2

Purchased energy

ESRS E1 requires both location-based and market-based Scope 2 calculations. Grid emission factors from IEA 2023.

Purchased electricity
Purchased heat / steam (optional)
Emission factor: 0.18 kgCO₂/kWh (EU district heating average, DEFRA 2023).
Step 4 of 4 — Scope 3

Value chain emissions

Select the categories material to your business. Categories pre-selected are commonly material for your sector. Use spend-based estimates where activity data isn't available.

Category 1
Purchased goods and services

Spend-based approach · DEFRA 2023

Category 3
Fuel and energy-related activities

Calculated automatically from your Scope 1 and 2 data using a 15% upstream factor (DEFRA 2023).

This includes upstream extraction, processing and transport of fuels and energy you consume. Will be calculated from your Scope 1 inputs.
Category 4
Upstream transportation and distribution

Spend-based or activity-based · DEFRA 2023

Factor: 0.35 kgCO₂e per € of freight spend

Category 5
Waste generated in operations

Activity-based · DEFRA 2023

Category 6
Business travel

Activity-based · DEFRA 2023

Category 7
Employee commuting

Activity-based · DEFRA 2023 · 220 working days/year default

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tCO₂e total GHG emissions
Emissions by scope
Scope 2 shown both location-based (grid average) and market-based (adjusted for RECs/GOs). ESRS E1 requires both figures.
ESRS E1-6 — Climate disclosures
Key metrics required under ESRS E1 for CSRD reporting. Use these figures as your starting point for your sustainability statement.
Scope 3 category breakdown
Data quality and emission factor source per category.
CategorytCO₂eData qualityFactor source
Emission factor transparency
Every factor used in this estimate — database, value, and year. Required for ESRS E1 auditability.
SourceActivityFactorUnitDatabase
This estimate is calculated entirely in your browser using DEFRA 2023 and IEA 2023 emission factors applied via the GHG Protocol methodology — no data is sent to any server, and no AI is used. Scope 3 categories use spend-based or simplified activity-based approaches based on published emission factors. This tool provides an indicative estimate for CSRD preparedness — it does not replace a verified GHG inventory. Emissions data submitted in CSRD reports must be verified by a third-party assurance provider. See our Privacy Policy for details on data handling.

Informational use only. This tool is provided for awareness purposes to help businesses understand their current situation regarding EU regulations. It does not constitute legal, regulatory, or professional advice. Results are indicative only and should not be relied upon as a substitute for qualified legal counsel. Verdaio accepts no liability for decisions made based on this tool’s output. All calculations run entirely in your browser — no data is sent to any server.