Carbon Footprint Calculator | The ESG Institute

Carbon Footprint Calculator

Estimate Scope 1, 2 and 3 GHG emissions in line with the GHG Protocol, structured for CSRD/ESRS E1, UK SECR, California SB253/261 and ISSB IFRS S2 disclosure — brought to you by The ESG Institute.

Download the user guide (PDF)

Organization & reporting setup

Filled once, used across both the quick estimate and the detailed calculator.

Organization name

Reporting year

Industry / sector ?

Country / primary operations

Don't see your country? Pick "Other" here and use the "Custom" grid factor option in Scope 2 to enter your own figure.

Reporting currency

Target disclosure framework ?

Annual revenue (millions)

Full-time employees (FTE)

Reporting boundary ?

Quick Estimate

A directional number based on typical emissions intensity for organizations of your size and sector. Good for a first read — not a substitute for the detailed calculator when you need audit-ready figures.

Remote / hybrid work share ?

Business travel level

Company vehicles / fleet size

Scope 1 — Direct emissions

Fuel burned on-site or in owned/leased vehicles, plus refrigerant leaks from owned equipment.

Facility / asset	Fuel / source (Select)	Quantity	Unit	tCO2e	Data quality (Select) ?

Scope 1 total 0.00 tCO2e

Scope 2 — Purchased energy

Electricity, heat, steam or cooling you purchase. Reported both location-based (grid average) and market-based (your actual supplier/contract), per GHG Protocol Scope 2 guidance.

Site	Energy type (Select)	Quantity	Unit	Location-based	Market-based	Data quality (Select)

Location-based total 0.00 tCO2e

Market-based total 0.00 tCO2e

If you don't have a supplier-specific emission factor or Guarantee of Origin/REC, leave the market-based factor as "Residual mix" — this flags it as an estimate rather than silently reusing the location-based number.

Scope 3 — Value chain emissions

The categories below are common material sources for most SMEs and have full calculators. All 15 GHG Protocol categories are screened further down so nothing gets silently dropped.

Business travel & accommodation (Category 6)

Trip / description	Mode (Select)	Quantity	Unit	tCO2e	Data quality (Select)

Employee commuting (Category 7)

Description	Mode (Select)	Quantity	Unit	tCO2e	Data quality (Select)

Purchased goods & services — spend-based (Category 1)

Supplier / description	Spend category (Select)	Spend	Unit	tCO2e	Data quality (Select)

Waste generated in operations (Category 5)

Waste stream	Treatment (Select)	Quantity	Unit	tCO2e	Data quality (Select)

Quantified Scope 3 total 0.00 tCO2e

Full 15-category materiality screen

GHG Protocol expects every category to be screened. Mark each as relevant or not — if relevant but you don't have data yet, it's flagged in your report as an estimation gap rather than assumed zero.

Results — GHG footprint summary

Total footprint (Scope 1 + Scope 2 location-based + Scope 3)

0tCO2e

Scope 1 — Direct

0% of total

Scope 2 — Location-based

0% of total

Scope 3 — Quantified

0% of total

Multi-year trend & reduction pathway

Save each reporting year as a snapshot to build a trend line, and overlay a science-based reduction pathway to see if you're on track.

Reduction pathway

Target year

Custom %/year

This pathway is a simplified linear approximation for orientation only, not a substitute for a validated SBTi target. SBTi near-term targets require a formal submission and validation through the Science Based Targets initiative; percentages shown reflect commonly cited cross-sector minimums, not a target calculated for your specific sector pathway.

Scope summary

Scope	tCO2e	% of total

Emissions intensity

Metric	Value

Data quality & verification readiness ?

Where to focus next

Want support acting on these numbers?

The ESG Institute's advisory team can help you turn this into a credible disclosure, or build in-house GHG accounting capability through our training programs.

Talk to our advisory team Explore our GHG & Carbon Markets diplomas

Peer benchmark ?

Scope 3 materiality coverage

Category	Status

Sources & methodology ?

Factor	Status	Source
UK grid electricity (location-based)	Verified	DESNZ/DEFRA, UK Government GHG Conversion Factors 2025 (published 10 Jun 2025)
Natural gas combustion	Verified	DESNZ/DEFRA 2025
Diesel, average car	Verified	DESNZ/DEFRA 2025
US grid electricity (national average)	Verified	US EPA eGRID2023
France grid electricity	Verified	RTE France, Bilan électrique 2025 Annual Review
Refrigerant GWP (R-410A, R-134a)	Verified	IPCC AR5 GWP-100 (physical constants)
India grid electricity	Verified	Central Electricity Authority, CO2 Baseline Database v21.0, FY2024-25 (official)
China, Japan, Australia grid electricity	Moderate confidence	Ember Global Electricity Review 2025 / IGES / national indicative estimates
EU-average, Germany, Spain, Italy, Netherlands, Canada grid electricity	Indicative	EEA / Ember country trend commentary and national generation-mix estimates — prefer a member-state or provincial-specific factor where available
Other fuel, travel, waste, homeworking factors	2024 vintage	DEFRA 2024 — combustion factors change little year to year, but flight/rail factors are revised annually with updated load factors; not independently re-verified for 2025 this session
Spend-based purchased-goods factors	Illustrative proxy	Generic EEIO estimate, not a national input-output table
Quick Estimate: Professional services & Technology benchmarks	Anchored	Real published disclosures (HSBC, Cambridge Intelligence) — see note under your Quick Estimate result
Quick Estimate: all other sector benchmarks	Modeled	Directional estimates, not benchmarked against a published cross-company study

This calculator was last refreshed against primary/secondary sources in July 2026. Before using any figure for external CSRD/SECR/SB253/ISSB disclosure, cross-check the specific line item against the current-year gov.uk, EPA, or national source, and record your own verification alongside the numbers. Market-based Scope 2 defaults to a European residual-mix factor unless you entered a supplier-specific figure.

DisclaimerThis report is generated automatically by a self-service calculator based on data you enter and default, publicly sourced emission factors. It is provided strictly for general, informational purposes and does not constitute audited data, third-party assurance, certification, or legal, financial, tax or other professional advice. The ESG Institute makes no representations or warranties of any kind, express or implied, as to the accuracy, completeness, currency or suitability of any figure produced by this tool, and assumes no responsibility or liability whatsoever for any error, omission, or for any loss, damage, cost or expense of any kind arising directly or indirectly from the use of, or reliance on, this tool or its output. Use of this tool is entirely at your own risk. Any figures intended for external regulatory, investor, or other disclosure must be independently verified by a qualified professional before use.

Scope 1

0.00

Scope 2

0.00

Scope 3

0.00

Running total

0.00 tCO2e

Organization & reporting setup

Quick Estimate

Scope 1 — Direct emissions

Scope 2 — Purchased energy

Scope 3 — Value chain emissions

Business travel & accommodation (Category 6)

Employee commuting (Category 7)

Purchased goods & services — spend-based (Category 1)

Waste generated in operations (Category 5)

Full 15-category materiality screen

Results — GHG footprint summary

Multi-year trend & reduction pathway

Scope summary

Emissions intensity

Data quality & verification readiness ?

Where to focus next

Want support acting on these numbers?

Peer benchmark ?

Scope 3 materiality coverage

Sources & methodology ?

Get your PDF report