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Sep 26, 2025

Free CO2 calculator for companies

Bernard de Wit

Founder

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TL;DR

More and more businesses need to map out their CO2 emissions, whether it’s to cut their carbon footprint, comply with regulations (like CSRD), or strengthen their sustainability policy. Calculating CO2 is the crucial first step. We explain how CO2 calculation works, why it matters, and how you can get started right now. Use our free tool for a quick and easy CO2 calculation.

Ready to start measuring? Use our free CO2 Calculator now. You can find it at the bottom of the page.

What is a CO2 calculation and why is it essential?

A CO2 calculation quantifies the emission of all greenhouse gases (expressed in CO2 equivalents, or CO2e) resulting from your company’s activities (transportation, energy, production, etc.). It includes CO2, methane (CH₄), and nitrous oxide (N2O), all converted into a single CO2e value.

For companies and organizations, there are several reasons to calculate their CO2 emissions:

Gain insight into your CO2 emissions: Understanding your emissions helps you identify where your biggest impact lies.
Plan CO2 reduction: Only by knowing your sources of emissions can you implement targeted reduction measures.
Comply with reporting obligations: Increasing regulations in the EU require transparency about emissions.
Strengthen your sustainability image: Customers, investors, and partners value transparency and climate action.
Prepare for future CO2 legislation: Think of CO2 pricing or emissions trading systems.

The method: how CO2 is calculated (GHG Protocol Scopes)

CO2 calculations typically use emission factors. An emission factor indicates the amount of CO2e emitted per unit of activity. For example:

Burning 1 liter of diesel = approx. 2.66 kg CO2e
1 kWh Dutch (grey) electricity = approx. 0.4 kg CO2e
1 ton of sea freight transport = approx. 15 kg CO2e

These factors are often sourced from reliable databases such as the IPCC, national databases or industry organizations.

According to the Greenhouse Gas Protocol, CO2 emissions are typically categorized into three scopes:

Scope 1 emissions: Direct emissions, for example from company-owned vehicles or installations.
Scope 2 emissions: Indirect emissions from purchased energy.
Scope 3 emissions: Other indirect emissions, for example from suppliers, transport, or employee commuting.

A complete CO2 calculation takes all these scopes into account.

Want a deep dive into the difference? Click here to learn more about Scope 1-2-3 emissions.

To illustrate, here's how a company calculates emissions from energy and transport:

100,000 kWh electricity (grey): 100,000 x 0.4 = 40,000 kg CO₂e (Scope 2)
50,000 liters diesel: 50,000 x 2.66 = 133,000 kg CO₂e (Scope 1)
Total Emissions: 173,000 kg CO₂e (or 173 tons).

Next steps: What to do after your CO2 calculation

A CO2 calculation is the starting line, not the finish line. It is the necessary foundation for:

CO2 Reduction Plans: Implementing energy efficiency, electrification, or sustainable mobility policies.
CO2 Offsetting: Compensating unavoidable emissions through certified climate projects.
Reporting: Providing transparent data to stakeholders, investors, and regulators.
Compliance: Meeting legal obligations and preparing for future climate policies.

Calculate your footprint with Regreener’s CO2 Calculator for Businesses

Calculating your emissions gives you control over your climate impact. Whether you're making initial measurements or performing detailed Scope 3 analyses, measuring is knowing.

At Regreener, we offer businesses practical tools, clear reporting, and effective compensation solutions. Our proprietary carbon management tool makes performing a full CO2 calculation simple and accurate, regardless of your company's complexity.

Stop estimating, start calculating. Use our CO2 Calculator for Businesses below to get started.

Looking for extra info?

Explore our FAQ guide.

TL;DR

Ready to start measuring? Use our free CO2 Calculator now. You can find it at the bottom of the page.

What is a CO2 calculation and why is it essential?

For companies and organizations, there are several reasons to calculate their CO2 emissions:

Gain insight into your CO2 emissions: Understanding your emissions helps you identify where your biggest impact lies.
Plan CO2 reduction: Only by knowing your sources of emissions can you implement targeted reduction measures.
Comply with reporting obligations: Increasing regulations in the EU require transparency about emissions.
Strengthen your sustainability image: Customers, investors, and partners value transparency and climate action.
Prepare for future CO2 legislation: Think of CO2 pricing or emissions trading systems.

The method: how CO2 is calculated (GHG Protocol Scopes)

CO2 calculations typically use emission factors. An emission factor indicates the amount of CO2e emitted per unit of activity. For example:

Burning 1 liter of diesel = approx. 2.66 kg CO2e
1 kWh Dutch (grey) electricity = approx. 0.4 kg CO2e
1 ton of sea freight transport = approx. 15 kg CO2e

Scope 1 emissions: Direct emissions, for example from company-owned vehicles or installations.
Scope 2 emissions: Indirect emissions from purchased energy.
Scope 3 emissions: Other indirect emissions, for example from suppliers, transport, or employee commuting.

A complete CO2 calculation takes all these scopes into account.

Want a deep dive into the difference? Click here to learn more about Scope 1-2-3 emissions.

To illustrate, here's how a company calculates emissions from energy and transport:

100,000 kWh electricity (grey): 100,000 x 0.4 = 40,000 kg CO₂e (Scope 2)
50,000 liters diesel: 50,000 x 2.66 = 133,000 kg CO₂e (Scope 1)
Total Emissions: 173,000 kg CO₂e (or 173 tons).

Next steps: What to do after your CO2 calculation

A CO2 calculation is the starting line, not the finish line. It is the necessary foundation for:

CO2 Reduction Plans: Implementing energy efficiency, electrification, or sustainable mobility policies.
CO2 Offsetting: Compensating unavoidable emissions through certified climate projects.
Reporting: Providing transparent data to stakeholders, investors, and regulators.
Compliance: Meeting legal obligations and preparing for future climate policies.

Calculate your footprint with Regreener’s CO2 Calculator for Businesses

Calculating your emissions gives you control over your climate impact. Whether you're making initial measurements or performing detailed Scope 3 analyses, measuring is knowing.

Looking for extra info?

Explore our FAQ guide.

TL;DR

Ready to start measuring? Use our free CO2 Calculator now. You can find it at the bottom of the page.

What is a CO2 calculation and why is it essential?

For companies and organizations, there are several reasons to calculate their CO2 emissions:

Gain insight into your CO2 emissions: Understanding your emissions helps you identify where your biggest impact lies.
Plan CO2 reduction: Only by knowing your sources of emissions can you implement targeted reduction measures.
Comply with reporting obligations: Increasing regulations in the EU require transparency about emissions.
Strengthen your sustainability image: Customers, investors, and partners value transparency and climate action.
Prepare for future CO2 legislation: Think of CO2 pricing or emissions trading systems.

The method: how CO2 is calculated (GHG Protocol Scopes)

CO2 calculations typically use emission factors. An emission factor indicates the amount of CO2e emitted per unit of activity. For example:

Burning 1 liter of diesel = approx. 2.66 kg CO2e
1 kWh Dutch (grey) electricity = approx. 0.4 kg CO2e
1 ton of sea freight transport = approx. 15 kg CO2e

Scope 1 emissions: Direct emissions, for example from company-owned vehicles or installations.
Scope 2 emissions: Indirect emissions from purchased energy.
Scope 3 emissions: Other indirect emissions, for example from suppliers, transport, or employee commuting.

A complete CO2 calculation takes all these scopes into account.

Want a deep dive into the difference? Click here to learn more about Scope 1-2-3 emissions.

To illustrate, here's how a company calculates emissions from energy and transport:

100,000 kWh electricity (grey): 100,000 x 0.4 = 40,000 kg CO₂e (Scope 2)
50,000 liters diesel: 50,000 x 2.66 = 133,000 kg CO₂e (Scope 1)
Total Emissions: 173,000 kg CO₂e (or 173 tons).

Next steps: What to do after your CO2 calculation

A CO2 calculation is the starting line, not the finish line. It is the necessary foundation for:

CO2 Reduction Plans: Implementing energy efficiency, electrification, or sustainable mobility policies.
CO2 Offsetting: Compensating unavoidable emissions through certified climate projects.
Reporting: Providing transparent data to stakeholders, investors, and regulators.
Compliance: Meeting legal obligations and preparing for future climate policies.

Calculate your footprint with Regreener’s CO2 Calculator for Businesses

Calculating your emissions gives you control over your climate impact. Whether you're making initial measurements or performing detailed Scope 3 analyses, measuring is knowing.

Looking for extra info?

Explore our FAQ guide.

TABLE OF CONTENTS

FAQs

How accurate is the calculation?

Regreener’s Carbon Calculator delivers reliable and actionable carbon footprint estimates by combining activity-based and spend-based methodologies—ensuring a practical balance between data availability and accuracy, aligned with GHG Protocol standards and suitable for audit-ready reporting.

How accurate is the calculation?

What is the Greenhouse Gas Protocol?

The Greenhouse Gas (GHG) Protocol is the world’s leading framework for measuring and managing greenhouse gas emissions across Scope 1, Scope 2, and Scope 3, helping businesses accurately assess their carbon footprint. Widely adopted by sustainability standards such as CDP, CSRD, and the Science Based Targets initiative (SBTi), the GHG Protocol ensures consistency, transparency, and credibility in corporate climate reporting and emissions reduction strategies.

To learn more about the Protocol, read our blog.

What is the Greenhouse Gas Protocol?

To learn more about the Protocol, read our blog.

What is the Greenhouse Gas Protocol?

To learn more about the Protocol, read our blog.

How does Regreener calculate my company's emissions?

We conduct our CO₂ measurements in accordance with the Greenhouse Gas (GHG) Protocol, the leading global standard for measuring and managing greenhouse gas emissions. Developed by the World Resources Institute (WRI) and the World Business Council for Sustainable Development (WBCSD), the GHG Protocol provides comprehensive guidelines and tools for organizations to accurately measure, manage, and report their emissions.

Understanding GHG Protocol Scopes

The GHG Protocol categorizes emissions into three distinct scopes: Scope 1, Scope 2, and Scope 3. Here’s a quick breakdown:

Scope 1 – Direct Emissions:
These are emissions from sources that are owned or controlled by the organization. Examples include emissions from on-site fuel combustion, such as gas heating systems, company-owned vehicles, or industrial processes.

Scope 2 – Indirect Emissions from Energy Use:
Scope 2 covers indirect emissions from the consumption of purchased energy, such as electricity, steam, or heating and cooling. While these emissions occur off-site, they are directly tied to the organization’s energy consumption.

Scope 3 – Other Indirect Emissions (Value Chain):
Scope 3 encompasses all other indirect emissions generated across the organization’s value chain. These may include emissions from:

The production and transportation of purchased goods (e.g., IT equipment or office supplies)
Business travel and employee commuting
Waste disposal and logistics
The production of food consumed by employees

How does Regreener calculate my company's emissions?

Understanding GHG Protocol Scopes

The GHG Protocol categorizes emissions into three distinct scopes: Scope 1, Scope 2, and Scope 3. Here’s a quick breakdown:

Scope 3 – Other Indirect Emissions (Value Chain):
Scope 3 encompasses all other indirect emissions generated across the organization’s value chain. These may include emissions from:

The production and transportation of purchased goods (e.g., IT equipment or office supplies)
Business travel and employee commuting
Waste disposal and logistics
The production of food consumed by employees

How does Regreener calculate my company's emissions?

Understanding GHG Protocol Scopes

The GHG Protocol categorizes emissions into three distinct scopes: Scope 1, Scope 2, and Scope 3. Here’s a quick breakdown:

Scope 3 – Other Indirect Emissions (Value Chain):
Scope 3 encompasses all other indirect emissions generated across the organization’s value chain. These may include emissions from:

The production and transportation of purchased goods (e.g., IT equipment or office supplies)
Business travel and employee commuting
Waste disposal and logistics
The production of food consumed by employees

Why should my company measure its carbon footprint?

Carrying out your own carbon assessment not only contributes to the global goal of reducing greenhouse gas emissions and combating climate change, but it also offers several strategic advantages:

Meet customer expectations: consumers, especially younger generations, increasingly favor businesses that prioritize sustainability.
Control operational costs: identifying and addressing inefficiencies can reduce expenses.
Attract investors: sustainability initiatives can make your business more appealing to socially responsible investors.
Enhance brand image: demonstrating climate action can strengthen your reputation and differentiate your brand.
Prepare for future regulations: stay ahead of evolving environmental laws and compliance requirements.

Why should my company measure its carbon footprint?

Carrying out your own carbon assessment not only contributes to the global goal of reducing greenhouse gas emissions and combating climate change, but it also offers several strategic advantages:

Meet customer expectations: consumers, especially younger generations, increasingly favor businesses that prioritize sustainability.
Control operational costs: identifying and addressing inefficiencies can reduce expenses.
Attract investors: sustainability initiatives can make your business more appealing to socially responsible investors.
Enhance brand image: demonstrating climate action can strengthen your reputation and differentiate your brand.
Prepare for future regulations: stay ahead of evolving environmental laws and compliance requirements.

Why should my company measure its carbon footprint?

Carrying out your own carbon assessment not only contributes to the global goal of reducing greenhouse gas emissions and combating climate change, but it also offers several strategic advantages:

Meet customer expectations: consumers, especially younger generations, increasingly favor businesses that prioritize sustainability.
Control operational costs: identifying and addressing inefficiencies can reduce expenses.
Attract investors: sustainability initiatives can make your business more appealing to socially responsible investors.
Enhance brand image: demonstrating climate action can strengthen your reputation and differentiate your brand.
Prepare for future regulations: stay ahead of evolving environmental laws and compliance requirements.