Free Tool

Carbon Diagnostic Tool

Estimate Your Carbon Footprint in 10 Minutes. Free. Instant results. GHG Protocol methodology.

What This Tool Does

The GSustain Carbon Diagnostic provides a rapid, indicative estimate of your organization's greenhouse gas emissions across Scope 1, 2, and 3. Enter your activity data -- energy consumption, fuel use, travel, procurement -- and receive an instant emissions breakdown with visual charts and a downloadable PDF report.

This tool uses internationally recognized emission factors and the GHG Protocol Corporate Standard methodology to produce directional estimates suitable for:

How It Works

1

Enter Details

Enter your organization details and select your sector

2

Input Data

Input activity data across energy, transport, waste, and procurement categories

3

Get Results

Receive instant results -- emissions breakdown by scope, source analysis, decarbonization pathways, and downloadable PDF report

Who Is This For?

Important Disclaimer

This tool provides indicative estimates based on the activity data you input and standard emission factors. It is not a substitute for a formal GHG inventory conducted under ISO 14064-1 or the GHG Protocol Corporate Standard. Results should be treated as directional, not auditable.

For a comprehensive, verification-ready GHG inventory, contact GSustain's advisory team. For independent verification of your emissions, contact our verification team.

GENERATING DIAGNOSTIC REPORT...

GSustain Carbon Diagnostic

GHG Protocol Corporate Standard • DEFRA 2024 Emission Factors

Estimate your organisation's greenhouse gas footprint across Scope 1, 2 and all 15 Scope 3 categories. Receive a benchmarked report with reduction recommendations and regulatory mapping.

1. Company Profile
2. Scope 1 & 2
3. Scope 3
4. Review & Generate
Estimated Total: 0.00 tCO2e

Company Profile

Confirm your organisation details and operational boundary for this assessment.

Operational Boundary

Select the consolidation approach and confirm which scopes you will report.

Scope 1 -- Direct Emissions

Emissions from sources owned or controlled by your organisation: fuel combustion, company vehicles, refrigerant leakage, and process emissions.

Stationary Combustion
0.00 tCO2e
0.00 tCO2e
0.00 tCO2e
Mobile Combustion (Company Vehicles)
0.00 tCO2e
0.00 tCO2e
Fugitive Emissions
0.00 tCO2e
0.00 tCO2e
0.00 tCO2e
0.00 tCO2e
Process Emissions
0.00 tCO2e

Scope 2 -- Indirect Energy Emissions

Emissions from purchased electricity, steam, heating and cooling. Both location-based and market-based methods are supported per GHG Protocol Scope 2 Guidance.

Location-Based (Grid Average)
0.00 tCO2e
0.00 tCO2e
0.00 tCO2e
Market-Based Adjustments

If you procure renewable energy via certificates (I-RECs, GOs, REGOs) or Power Purchase Agreements (PPAs), enter the percentage of your electricity covered.

Market-based Scope 2 = (Grid electricity x (1 - renewable%)) x market factor. If no market factor is entered, the grid factor will be used for the non-renewable portion.

Scope 3 -- Value Chain Emissions

All 15 GHG Protocol Scope 3 categories. Use activity data where available; spend-based screening factors are applied as a fallback. Leave categories at zero if not applicable.

Upstream (Categories 1-8)
0.00 tCO2e
0.00 tCO2e
0.00 tCO2e
0.00 tCO2e
0.00 tCO2e
0.00 tCO2e
0.00 tCO2e
0.00 tCO2e
Downstream (Categories 9-15)
0.00 tCO2e
0.00 tCO2e
0.00 tCO2e
0.00 tCO2e
0.00 tCO2e
0.00 tCO2e
0.00 tCO2e

Review Your Data

Verify all entries below before generating your report. You can go back to any step to make changes.

ScopeSourceInputtCO2e
TOTAL ESTIMATED EMISSIONS 0.00 tCO2e

Emissions Summary

0.00
Scope 1 (tCO2e)
0.00
Scope 2 (tCO2e)
0.00
Scope 3 (tCO2e)

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Reference:
Date:
Sector:
Country:
Reporting Year:
Corporate Carbon Diagnostic

GHG Baseline Assessment & Strategic Roadmap

Prepared For: Contact: Email:
Employees: Phone: Regional Contact:
1. Executive Overview
0.00
Total tCO2e
--
tCO2e / Employee
0
Shadow Carbon Cost
0%
Supply Chain Ratio
2. Emissions Profile
Fig 2.1: Scope Distribution
Fig 2.2: Top Emission Sources
3. Scope 2 Dual Reporting
MethodApproachtCO2e
4. Emission Source Ledger
ScopeSourceInputtCO2e
5. Industry Benchmark
6. Regulatory Readiness
Based on your organisation profile, the following disclosure frameworks are applicable:
FrameworkJurisdictionStatusKey Requirement
7. Reduction Roadmap
Priority decarbonisation actions based on your emission profile:
8. Strategic Implications
Unlock Your Net Zero Roadmap
This screening-level diagnostic provides an indicative baseline. For investor-grade assurance, a full ISO 14064-1:2018 verification and SBTi-aligned target-setting exercise is recommended.
Methodology & Sources: Emission factors aligned with UK Government GHG Conversion Factors (DEFRA/BEIS 2024). Electricity grid factors from IEA 2023 and national registries. Scope 3 screening factors from DEFRA 2024 and Quantis/GHG Protocol Scope 3 Evaluator. Calculations follow the GHG Protocol Corporate Accounting and Reporting Standard (Revised Edition) and the GHG Protocol Scope 2 Guidance (2015). Shadow carbon cost based on IMF recommended social cost of carbon (2024 estimates). Industry benchmarks derived from CDP 2023 disclosure data and IEA sectoral statistics.
CONFIDENTIAL • GENERATED BY GSUSTAIN CARBON DIAGNOSTIC ENGINE • NOT FOR STATUTORY FILING
This is a screening-level estimation based on user inputs and is not a verified GHG inventory statement.

Want Verified Emissions, Not Just Estimates?

This diagnostic provides directional estimates. For a formal, verification-ready GHG inventory under ISO 14064-1, contact our GAB-accredited verification team.

GHG Verification Services