Read me first: FREE business Carbon Calculator (after reading this, scroll down page to view):  This calculator will automatically calculate and display your business scope 1, 2 & 3 (grey fleet) carbon emissions (kgCO2e) using GHG conversion factors provided by the UK Government.

As you work through the form, each tab will ask a series of questions (multiple choice tick boxes) that enable the calculator to determine which conversion factors to use.  At the end of the questions in each tab, boxes will appear for users to input data.  kgCO2e results are automatically calculated and shown on the last tab (9) based on the data inputted into these boxes.  Please note, if you do not answer all the tick box questions that appear in each tab, no data input boxes will appear for the you to enter your figures in. This will mean the calcualtor will have nothing to calculate, which will make it sad.

On the last tab, you will have the option to purchase a full SECR report, which further breaks down your emissions into Green House Gases (GHG) and provides energy (kWh) consumed.

UK Companies are required to submit an SECR report with their directors reports that start on or after 01/04/2019. Therefore, they must cover each financial year after that date. 

Please note, this is a legacy version of this calculator.  If you would to use an updated version, please visit https://www.secr.uk.

If you have any questions, please see our FAQ page or e-mail [email protected].

Important! The data is not saved until you reach the last page and press the submit button.  The calculator converts consumption data to carbon emissions (kgCO2e) therefore, you need the consumption data (litres,kWh, m3 consumed etc.) to hand to get instant results.  We have built a pro forma to help you gather the data.  We have also built a series of free calculators (accessed via the menu at the top of the page) to convert consumption/emissions to the required units. As you work through the form, if a tab is not relevant (e.g. HGV), just leave blank and press next.  If you decide not to purchase a SECR report, still press submit and we will send your carbon emission calculations (please allow 24 hours).

Important! Do not use comma (,) separators

Work through the calculator by pressing the ‘next’ button at the bottom, the calculator will not let you skip forward steps (although you can skip backwards).  The results will be displayed on the last tab.

1 Company Information
2 Transport: Cars
3 Transport: Vans
4 Transport: Grey Fleet
5 Transport: HGV
6 Buildings
7 Processes
8 Fugitive Emissions
9 Results
Carbon Calculator

Which consolidation approach was chosen? If your company is reporting according to more than one consolidation approach, please submit separate form entries with emission data following the other consolidation approach(es).

Please click here for further information of what we mean by ‘consolidation approach’

Select type of control
Are you a Quoted company?A quoted company is defined in section 385(2) of the Companies Act 2006 as a company that is UK incorporated and whose equity share capital is listed on the Main Market of the London Stock Exchange UK or in an EEA State, or admitted to trading on the New York Stock Exchange or Nasdaq.
Are you part of a corporate group?
Are you reporting individually or for the whole group?

Leased assets and operational boundaries:  You have selected ‘equity share’ or ‘financial control’ as the operational boundary.   This will likely affect how your direct or indirect emissions for leased assets are categorised.   

If you (the company) leases assets (buildings or vehicles) under an operating lease, and you have selected ‘equity share’ or ‘financial control’, the emissions associated with fuel combustion as well as with the use of purchased electricity should always be categorized as scope 3 (indirect).

This calculator is unable to automatically assign scope 3 emissions if you select ‘equity share’ or ‘financial control’.  It will assign the emissions using the ‘operational control’ approach.  If you decide to purchase an SECR report at the end of this calculator, we will get in contact to determine which scope the emissions should be categorised in.   

Streamlined Energy and Carbon Reporting regulations require that quoted companies provide additional Green House Gas emission information.  Upon submission of the form we will be in contact to clarify your company requirements and quote for the additional work.

Company/Fleet Cars: What Transport Fuel Consumption data do you have?Ideally, we want litres consumed (list descends in order of preference). Please ensure you do not double account (i.e. provide both litres consumed and cost for the same fuel consumption)

Please divide the total amount paid by the average cost of fuel (split by fuel type if possible) over that year (see https://www.theaa.com/driving-advice/driving-costs/fuel-prices) this will give you an approximate figure of the litres consumed.

What transport fuels have you consumed*Only include electric if it is supplied by a dedicated supply (metered or sub-metered). This will prevent double accounting
Cost Data: Are you able to split the amount claimed by each vehicle and identify the vehicle registration or MPG or kgCO2/km?
Cost Data: Ideally, the carbon emissions generated by each vehicle should be calculated based on the manufacturer’s MPG or emission data for each vehicle. This calculator cannot do this. If you would like us to calculate this for you, there will be an additional charge. Would you like to proceed and generate an approximate figure, or, add manual calculation data?
Are you able to split the miles travelled by fuel type?
Are you able to split the miles travelled by individual vehicles?
Are you able provide the registration, or, MPG, or gCO2/km of each vehicle?
Ideally, the carbon emissions generated by each vehicle should be calculated based on the manufacturer’s MPG or emission data for each vehicle. This calculator cannot do this. If you would like us to calculate this for you, there will be an additional charge. Would you like to proceed and generate an approximate figure, or, add manual calculation data?

Please enter ‘0’ in the box below and complete the form as normal, we will be in contact to arrange your manual calcualtion (an additional charge will apply).

Please divide the total amount paid by the amount paid per mile to obtain the mileage claimed (e.g. £10,000 spent by staff using petrol vehicles @ 45p/mile = 22,222 miles in petrol vehicles (10,000/0.45)

Do you know the engine size of each vehicle (small, medium, large is OK)
Select fuel typePlease ensure the next section of data you fill in is for the whole company, not indivdual cars
Select fuel type
Is it possible to split by individual vehicles?
Are you able to provide the registration of each vehicle?

Ideally, the carbon emissions generated by each vehicle should be calculated based on the manufacturer’s MPG or emission data for each vehicle. This calculator cannot do this. If you would like us to calculate this for you, there will be an additional charge. Please submit the form after you have filled in all other data and we will be in contact to quote for this additional work.

Would you like to estimate the GHG emissions based on average vehicle data?

Please submit the form as normal and we will be in touch to quote for the additional work.

Are you able to split by size of engine?Small, medium or large?
Transport: Vans: What transport consumption data do you have?Ideally, we want litres consumed (list descends in order of preference). Please ensure you do not double account (i.e. provide both litres consumed and cost for the same fuel consumption)

Please divide the total amount paid by the average cost of fuel (split by fuel type if possible) over that year (see https://www.theaa.com/driving-advice/driving-costs/fuel-prices) this will give you an approximate figure of the litres consumed.

Vans: Are you able to provide the registration or MPG or gCO2/km of each vehicle?
Vans: What transport fuels have you consumed*Only include electric if it is supplied by a dedicated supply (metered or sub-metered). This will prevent double accounting

Please divide the total amount paid by the amount paid per mile to obtain the mileage claimed (e.g. £10,000 spent by staff using petrol vehicles @ 45p/mile = 22,222 miles in petrol vehicles (10,000/0.45)

Ideally, the carbon emissions generated by each vehicle should be calculated based on the manufacturer’s MPG or emission data for each vehicle. This calculator cannot do this. If you would like us to calculate this for you, there will be an additional charge. Please submit the form after you have filled in all other data and we will be in contact to quote for this additional work.

Vans: Would you like to estimate the GHG emissions based on average vehicle data?

Please submit the form as normal and we will be in contact to quote and arrange this.

Are you able to split the consumption by revenue weight of vehicles?Please group vehicles in to each weight category and provide the total miles travelled for each category.
Are you able to split the consumption by fuel type?
Please select applicable revenue weights
Class I: fuel typesup to 1.305 tonnes
Class II: fuel types1.305 to 1.74 tonnes
Class III: fuel types1.305 to 1.74 tonnes
Average Vehicle fuel types(up to 3.5 tonnes):

Grey fleet refers to vehicles that are personally owned by staff members which they use for business purposes and claim back the cost through the company. Please note, is does not include commuting.

Transport: Grey Fleet: Do you know the registration or MPG or kgCO2/km for each vehicle?

Ideally, the carbon emissions generated by each vehicle should be calculated based on the manufacturer’s MPG or emission data for each vehicle. This calculator cannot do this. If you would like us to calculate this for you, there will be an additional charge. Please submit the form after you have filled in all other data and we will be in contact to quote for this additional work.

Grey Fleet: Would you like to purchase the addtiitonal calcualtion (we will be in contact upon submission of the form)?
Grey Fleet: Are you able to split by fuel type?
Grey Fleet: Unknown Fuel:Are you able to group the vehicles by engine size?e.g. Small, medium, large
Grey Fleet: Known Fuel: Are you able to group the vehicles by engine size?e.g. Small, medium, large
Grey Fleet: (Known Engine Group) Please select fuel types
Grey Fleet: (Unknown Engine Group) Please select fuel types

Please divide the total amount paid by the amount paid per mile to obtain the mileage claimed (e.g. £10,000 spent by staff using petrol vehicles @ 45p/mile = 22,222 miles in petrol vehicles (10,000/0.45)

This calculator is unable to calculate HGV emissions (commercial vehicles >3.5 tonnes). If you have HGV, please complete the questions below.
Buildings: Select the energy sources you consume in your buildings (This includes energy used in processes (e.g. manufacturing a product)

It is important that the figures given below are in the unit kWh.  If you have meter readings/quantity delivered data, we have developed a calculator to help you convert consumption to kWh (click here to access).

Process Emissions: If your business generates process GHG emissions (i.e. you manufacture a product that during the process of manufacturing releases Green House Gases), it is unlikely that this calculator will be detailed enough for your needs.  If you would like us to get in contact to provide a bespoke quote to produce a report for your company, check the box below (and make sure you press submit on the last page of the form).  If you have calculated your process emissions, check the applicable box and enter the data.  Please leave blank if not applicable.

Please select

Fugitive Emissions: Fugitive emissions are sources of Green House Gases that escape from Air Conditioning and refrigeration equipment.  Click here to access the calculator we have developed to help you calculate your fugitive emissions.  When you have the results, please enter in the box below.  If you do not have refrigeration or AC equipment, please ignore this section.

Your scope 1,2,3 carbon emissions are detailed below.  If you would like to purchase a full SECR report, please tick the box below and press the ‘submit button’, upon which you will be taken to a PayPal page.  If you want to pay another way please select the second tick box or e-mail ‘[email protected]’. (don’t forget to submit the form). The cost of SECR report is £450+VAT.  To see an example of what you will receive, please click here (to prevent it being copied, we have replaced some of the text with place holder text – sorry).  

Please select

SECR legislation requires that you compare your carbon emissions against an intensity metric relevant to your company.  For example, you could compare kgCO2e against m2 of office space occupied or turnover (£).  Once you have selected your metric, please write it in the box below including the units.  We will divide it by your emissions.  For example, if you are using office space occupied you would enter the total space occupied in all UK offices in m2.

If you do not want to fill this in at this moment, please leave blank and we will be in contact to gather the information when finalising your report.

SECR legislation requires that you (the company) detail the energy efficiency actions you have undertaken over the past financial year.  Please list them in the box(s) below.  Again, you can leave this blank and we will be in contact to gather the information when completing your report.

ItemsQtyTotal
SECR Report1540
Annual Charge $xxx

Scope 1

Process Emissions:[Field316*1] kgCO2e 

Fugitive Emissions:[Field318*1] kgCO2e 

Gas (Natural):[Field285*0.18385] kgCO2e 

Kerosene:[Field298*0.24675] kgCO2e 

LPG:[Field299*0.18443] kgCO2e 

Gas Oil (Red Diesel):[Field300*0.25676] kgCO2e 

Coal (Domestic):[Field301*0.34473] kgCO2e 

Biomass (Pellets/Chips/Logs):[Field302*0.01563] kgCO2e 

Diesel Large Company/Fleet Car: [field44*0.33713] kgCO2e
Vans: LPG: [Field132*0.21447] kgCO2e 

Vans: Petrol: [Field131*2.20904] kgCO2e 
Unknown Fuel, Medium Company/Fleet Car: [field113*0.29082] kgCO2e
Vans: Diesel: [Field130*2.59411] kgCO2e 
Average Company/Fleet Car (Unknown Fuel): [Field100*0.28502] kgCO2e
Unknown Fuel, Small Company/Fleet Car: [field111*0.24072] kgCO2e
Company/Fleet cars: Diesel: [Field1*2.59411] kgCO2e 

Company/Fleet cars: Unknown Fuel: [((Field202* 2.59411)*0.6)+((Field202* 2.20904)*0.4)] kgCO2e
Company/Fleet cars: Red Diesel: [Field6*2.59411] kgCO2e 

Company/Fleet cars: Petrol: [Field3*2.20904] kgCO2e 
LPG Small Company/Fleet Car : [field64*0.29073] kgCO2e
Company/Fleet cars: LPG: [Field4*0.21447] kgCO2e 
Petrol Large Company/Fleet Car: [field42*0.45536] kgCO2e
Petrol Small Company/Fleet Car: [field40*0.24736] kgCO2e
Petrol Medium Company/Fleet Car: [field41*0.30945] kgCO2e
LPG Medium Company/Fleet Car: [field65*0.29073] kgCO2e
Diesel Medium Company/Fleet Car: [field45*0.27459] kgCO2e
Hybrid Large Company/Fleet Car: [field 54*0.21207] kgCO2e
Hybrid Small Company/Fleet Car: [field52*0.1693] kgCO2e
LPG Large Company/Fleet Car  [field66*0.42794] kgCO2e
Petrol Average Company/Fleet Car: [field88*0.27901] kgCO2e
Diesel Average Company/Fleet Car: [field89*0.29103] kgCO2e
LPG Average Company/Fleet Car: [field90*0.32027] kgCO2e
Hybrid Average Company/Fleet Car: [field91*0.18464] kgCO2e
Hybrid Medium Company/Fleet Car: [field53*0.17534] kgCO2e
Vans: Class I Diesel: [(Field142*0.621371)*0.14955] kgCO2e 


Vans: Diesel (Class II): [(Field152*0.621371)*0.19455] kgCO2e 


Vans: Class I Petrol: [(Field144*0.621371)*0.23741] kgCO2e 


Average Van (LPG): [(Field175*0.621371)*0.27244] kgCO2e 


Average Van (Unknown Fuel Type): [(Field178*0.621371)*0.25162] kgCO2e 

Average Van (Diesel): [(Field168*0.621371)*0.25213] kgCO2e 


Vans: Petrol  (Class III): [(Field163*0.621371)*0.3846] kgCO2e 


Average Van(Petrol): [(Field172*0.621371)*0.23645] kgCO2e 


Vans: Diesel (Class III): [(Field162*0.621371)*0.27777] kgCO2e 


Vans: Petrol  (Class II): [(Field153*0.621371)*0.22833] kgCO2e 


Diesel Small Company/Fleet Car: [field43*0.22868] kgCO2e
Unknown Fuel, Large Company/Fleet Car: [field112*0.36785] kgCO2e
Plug-in Hybrid Average Company/Fleet Car: [field92*0.11386] kgCO2e
Plug-in Hybrid Small Company/Fleet Car: [field57*0.04723] kgCO2e
Plug-in Hybrid Medium Company/Fleet Car: [field58*0.11399] kgCO2e
Plug-in Hybrid Large Company/Fleet Car: [field 59*0.12442] kgCO2e

Scope 2

Company/Fleet cars: Electricity (Grid Supplied): [Field5*0.2556] kgCO2e 
Vans: Electricity (Grid Supplied): [Field133*0.2556] kgCO2e 

BEV Average Company/Fleet Car: [field93*0.09688] kgCO2e
BEV Small Company/Fleet Car: [field61*0.07975] kgCO2e
BEV Medium Company/Fleet Car: [field62*0.09282] kgCO2e
BEV Large Company/Fleet Car: [field 63*0.11677] kgCO2e
Average Van (BEV): [(Field171*0.621371)*0.06285] kgCO2e 


Vans: BEV (Class I): [(Field145*0.621371)*0.04598] kgCO2e 


Vans: BEV (Class II): [(Field154*0.621371)*0.06275] kgCO2e 


Vans: BEV (Class III): [(Field164*0.621371)*0.09141] kgCO2e 


Electricity (Grid Supplied):[Field297*0.2556] kgCO2e 

Scope 3

Grey Fleet: Unknown Car (unknown fuel): [field217*0.28502] kgCO2e
Grey Fleet: Unknown Car (unknown fuel): [field327] kgCO2e
Grey Fleet: Petrol: Small Car: [field229*0.24736] kgCO2e
Grey Fleet: Petrol: Medium Car: [field235*0.30945] kgCO2e
Grey Fleet: Petrol: Large Car: [field234*0.45536] kgCO2e
Grey Fleet: Hybrid: Medium Car: [field246*0.17534] kgCO2e
Grey Fleet: Hybrid: Small Car: [field245*0.1693] kgCO2e
Grey Fleet: Unknown BEV Car: [field270*0.09688] kgCO2e
Grey Fleet: Unknown Hybrid Car: [field268*0.18464] kgCO2e
Grey Fleet: Unknown Plug-in Hybrid Car: [field269*0.18559] kgCO2e
Grey Fleet: Unknown LPG Car: [field267*0.32027] kgCO2e
Grey Fleet: Unknown Petrol Car: [field266*0.29103] kgCO2e
Grey Fleet: Unknown Diesel Car: [field265*0.27901] kgCO2e
Grey Fleet: BEV: Large Car: [field260*0.11677] kgCO2e
Grey Fleet: BEV: Medium Car: [field259*0.09282] kgCO2e
Grey Fleet: BEV: Small Car: [field258*0.07975] kgCO2e
Grey Fleet: Plugin Hybrid: Large Car: [field331*0.20225] kgCO2e
Grey Fleet: Plugin Hybrid: Medium Car: [field253*0.17699] kgCO2e
Grey Fleet: Hybrid: Large Car: [field247*0.21207] kgCO2e
Grey Fleet: Plugin Hybrid: Small Car: [field252*0.11823] kgCO2e
Grey Fleet: LPG: Small Car: [field239*0.29073] kgCO2e
Grey Fleet: LPG: Medium Car: [field241*0.29073] kgCO2e
Grey Fleet: LPG: Large Car: [field240*0.42794] kgCO2e
Grey Fleet: Diesel: Large Car: [field227*0.33713] kgCO2e
Grey Fleet: Diesel: Small Car: [field226*0.22868] kgCO2e
Grey Fleet: Diesel: Medium Car: [field228*0.27459] kgCO2e
Grey Fleet: Small Car (unknown fuel): [field214*0.24072] kgCO2e
Grey Fleet: Medium Car (Unknown Fuel): [field215*0.29082] kgCO2e
Grey Fleet: Large Car (Unknown Fuel): [field216*0.36785] kgCO2e
Grey Fleet: Known: [field327*1] kgCO2e

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