For small and medium businesses
Generate official CO2 emission reports quickly and accurately, tailored specifically for small and medium enterprises.
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Allows instant access to the calculation steps. Fill in all data and view a preliminary report summary without any commitment.
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How it works
Pick one or more. The form only asks what applies to you.
Energy, transport and sector numbers, one short group at a time. Not sure? We estimate.
Your total, a split by scope and source, and where to start reducing.
Partners
Working together for a sustainable future, through trusted partnerships and collaboration.
Partnering with banks and financial services to bring carbon reporting into their offer for small and medium businesses.
Working with sector organisations to keep every calculation true to industry standards.
Working with recognised certification authorities to validate how we calculate emissions.
Interested in partnering with the CO₂ Calculator? We are always looking for organisations that share our view on sustainability and environmental responsibility.
Offer your business clients full carbon footprint reports as part of your sustainability services.
Help refine sector specific calculations and keep them accurate across industries.
Build the calculator into the business platforms and tools your clients already use.
Use the platform to give your clients sustainability insights based on their own data.
Methodology
Transparent, science based calculations that follow internationally recognised standards.
Calculations follow the Greenhouse Gas Protocol, the most widely used international standard for governments and businesses to measure and manage greenhouse gas emissions.
Emission factors come from trusted sources such as DEFRA, the EPA and the International Energy Agency, and are updated regularly with the latest scientific data.
Sector specific calculations keep results accurate across industries, from manufacturing to services, with factors tailored to each type of business.
Every calculation can be traced: the report shows how your total comes from the data you entered.
From sources your organisation owns or controls: fuel burned on site, company vehicles and leaks such as refrigerants.
From producing the electricity, steam, heating and cooling your organisation buys and uses.
From business travel, commuting, waste and other activities in your value chain, where they apply.
The methodology lines up with the main sustainability reporting frameworks.
FAQ
Answers to common questions about the CO₂ Calculator and carbon footprint reporting.
A carbon footprint is the total amount of greenhouse gases, including carbon dioxide and methane, that your business activities produce. It is measured in tonnes of CO₂ equivalent (t CO₂e) and covers direct emissions from your operations as well as indirect emissions from the energy you use and other activities in your value chain.
Measuring your footprint is the first step to reducing it. It helps you find savings through energy efficiency, meet regulatory requirements, build trust with customers and investors, qualify for green financing and contribute to global climate goals.
We use verified emission factors from trusted sources such as DEFRA, the EPA and the International Energy Agency, and follow the GHG Protocol, the international standard for carbon accounting. Accuracy depends on your data: the more specific your inputs, the more accurate the result.
Guests can create and view a single report, which is perfect for a quick check. Registered users can save several reports, track emissions over time, see their history and trends, export reports to PDF and Excel, and get personal recommendations for reducing emissions.
It depends on the sectors you choose, but usually: energy use (electricity, gas, fuel), transport (vehicle fuel, business travel) and sector specific data such as production volumes or floor space. You don't need exact figures. Estimates from bills and records work well, and if you don't know a value you can choose "I don't know" and we estimate it for your sector.
Most businesses finish a basic report in 10 to 15 minutes. It depends on how ready your data is and how complex your operations are. Gather your energy bills, vehicle logs and travel records before you start.
Yes. Drafts save as you go and can be changed at any time. With an account you keep one report for each year, so you can start a new one with updated data and compare years.
Yes. All data is encrypted in transit and at rest. We follow industry standard security practices and store only what is needed to produce your reports. Registered users' data is stored securely and is never shared with third parties without your explicit consent.
Common steps are switching to renewable energy, improving efficiency (LED lighting, insulation, modern equipment), optimising transport (route planning, electric vehicles, public transport), cutting waste and recycling more, and working with suppliers on sustainability. Your report highlights your biggest sources so you know where to start.
The report gives you a solid basis for understanding your emissions and supports compliance work. Official regulatory submissions may need extra verification or a third party audit, depending on your country and industry. Ask a qualified sustainability professional about your specific requirements.
Can't find what you are looking for? Our team is here to help.
Step 1 of 3
Select one or more sectors. This ensures your data entry forms are customized and accurate.
Step 3 of 3 · Report
Comprehensive analysis of your carbon footprint
Total CO2 Emissions
0tonnes CO2e/year
Turn on one or more actions and see your total change.
The calculation service did not answer. Your data is saved in this browser, nothing is lost.
Fill in your data first. Have last year's energy and fuel bills at hand, it takes 10 to 15 minutes.