Carbon Calculator
Step 1: Company Overview
ERM’s Carbon Calculator is designed to measure the carbon footprint for your office(s). Please complete all of the fields as indicated. If you do not have exact numbers, use the link at the top of each section to use estimated amounts.
Company Name or Office:
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Industry:
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Country:
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Total Number of staff:
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Office area occupied:  
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A carbon footprint is the total emission of carbon dioxide and any other greenhouse gases (GHGs) in terms of carbon dioxide equivalents (CO2e) for a defined system or activity. It measures the total contribution to climate change and identifies where the biggest carbon impacts occur.
Your current carbon output is:
0 Tonnes
Step1
Go to the next step to increase your accuracy.
Step 1

You will need the following to complete the calculator:

  1. Office information such as the number of employees and size of your office space
  2. Information on your annual electricity and natural gas consumption
  3. Information about your employees business travel via car, rail and airplane
  4. Information regarding the air conditioning system in your office
ERM PDF Document

Compile all the data you will need onto one worksheet.

We have created a checklist for you to download and complete prior to starting the calculator.

Download worksheet

This calculator provides an initial estimate of your office’s carbon emissions.

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Identify your company and office location.
Selecting your industry increases the overall accuracy of the carbon footprint calculations, as well as informing usage of the application.
Identify the country where the office is located. The amount of carbon placed in the atmosphere per kilowatt of usage varies between different regions. Selecting the region increases the accuracy of the overall carbon footprint calculation.
Please provide the number of employees (full and part-time) based at the office on the 31st of December of the reporting year.
Please provide details of the floor space occupied. This figure should exclude car parks, plant rooms, etc. This figure is known as the treated floor area (TFA).