How to Calculate Your Business's Carbon Footprint in 2025

Every business produces greenhouse gas emissions — whether through electricity use, employee commuting, supply chain purchases, or business travel. Understanding your company's carbon footprint is the first step toward reducing it, meeting regulatory requirements, and demonstrating environmental responsibility to customers and partners.

But where do you start? For many small and medium-sized businesses, carbon accounting can feel overwhelming. The good news: it doesn't have to be. This guide walks you through exactly how to calculate your business carbon footprint, step by step.

What Is a Business Carbon Footprint?

A business carbon footprint is the total amount of greenhouse gases (GHGs) your company produces, measured in tonnes of carbon dioxide equivalent (tCO2e). It covers everything from the energy you use in your offices to the emissions embedded in your supply chain.

The Greenhouse Gas Protocol — the global standard for carbon accounting — divides emissions into three scopes:

• •Scope 1 (Direct emissions): Emissions from sources your company owns or controls. This includes on-site fuel combustion (natural gas heating, company vehicles), refrigerant leaks, and manufacturing processes.
• •Scope 2 (Indirect energy emissions): Emissions from purchased electricity, heating, or cooling. When your office uses grid electricity, the power plant's emissions count as your Scope 2.
• •Scope 3 (Value chain emissions): Everything else — employee commuting, business travel, purchased goods and services, waste, and the use of your products by customers. Scope 3 typically accounts for 70–90% of a company's total footprint.

Step 1: Define Your Boundaries

Before collecting data, decide what you're measuring:

• •Organizational boundary: Which legal entities, offices, or facilities are you including? For most SMBs, this is straightforward — your main office and any satellite locations.
• •Time period: Most companies measure annually, aligned with their fiscal year. If this is your first time, start with the most recent 12-month period where you have complete data.
• •Operational scope: At minimum, measure Scope 1 and 2. Scope 3 is increasingly expected by regulators and large enterprise customers.

Step 2: Gather Your Activity Data

This is the most time-consuming step, but it's where accuracy matters most. Here's what to collect:

For Scope 1

• •Natural gas bills (in cubic meters or therms)
• •Fuel purchases for company vehicles (gallons or liters of gasoline/diesel)
• •Refrigerant recharge records (if applicable)

For Scope 2

• •Electricity bills (in kWh) for all facilities
• •District heating or cooling invoices (if applicable)

For Scope 3

• •Employee headcount and commuting patterns (survey your team or use averages)
• •Business travel records (flights, hotel nights, rental cars)
• •Total spend on purchased goods and services (for spend-based estimation)
• •Office square footage (for facility-related estimates)

Pro tip: Start with your utility bills and accounting records. Most of this data already exists — you just need to organize it. Your finance team or accountant is your best ally here.

Step 3: Apply Emissions Factors

Emissions factors convert your activity data into CO2e. For example:

The calculation is simple multiplication:

Activity Data × Emissions Factor = CO2e

For example: 10,000 kWh of electricity × 0.42 kg CO2e/kWh = 4,200 kg CO2e (4.2 tonnes)

Step 4: Calculate Your Total Footprint

Add up all your Scope 1, 2, and 3 emissions. A typical result for a 50-person office-based company in the US looks something like:

• •Scope 1 (natural gas, company vehicles): 15–30 tCO2e
• •Scope 2 (electricity): 40–80 tCO2e
• •Scope 3 (commuting, travel, supply chain): 200–600 tCO2e
• •Total: 255–710 tCO2e/year

Don't be surprised if Scope 3 dominates your total. That's normal — and it's why regulations like California's SB 253 are increasingly requiring Scope 3 reporting from large companies, who then need emissions data from their SMB suppliers.

Step 5: Use a Business Carbon Footprint Calculator

Manual calculations work, but they're tedious and error-prone. A business carbon footprint calculator automates the math, uses up-to-date emissions factors, and generates professional reports.

Verdra's free carbon footprint calculator lets you estimate your business emissions in under 5 minutes. Just enter your industry, employee count, office size, energy usage, and travel data — and get an instant breakdown by scope and category.

For a detailed, compliance-ready report with reduction recommendations, Verdra offers a comprehensive analysis for just €199 — a fraction of what consultants charge (€5,000–€15,000).

Why Calculating Your Carbon Footprint Matters Now

Three trends are making carbon accounting essential for SMBs in 2025:

1. 1.Supply chain pressure: Large companies subject to SB 253 and CSRD must report Scope 3 emissions, which means they need data from their suppliers — including SMBs.
2. 2.Customer expectations: 78% of consumers say sustainability influences their purchasing decisions. A credible carbon footprint measurement demonstrates your commitment.
3. 3.Cost savings: The process of measuring often reveals energy waste and inefficiency. Many businesses find that reducing their footprint saves money too.

Getting Started Today

You don't need a sustainability team or a six-figure budget to measure your carbon footprint. Start with Verdra's free calculator, get your baseline number, and go from there.

The hardest part isn't the math — it's getting started. And now you have everything you need to take that first step.

*Ready to calculate your business carbon footprint? Try Verdra's free calculator — it takes less than 5 minutes.*