NUMBER OF PEOPLE: 1

1 2 3 4 5

Energy Source Annual Total Factor

###

Electricity (from ESB) kWhr 0.63 ###

Electricity (from An Bord Gais) kWhr 0.20 ###

Electricity (from Airtricity) kWhr 0.07 ###

Gas (Heating) kWhr 0.20 ###

Oil (Kerosene) litres 2.52 ###

Oil (Gasoil) litres 2.67 ###

Oil (HFO) litres 3.22 ###

Gas (Prop/but) litres 1.50 ###

Coal kilogrammes 2.46 ###

Peat kilogrammes 1.36 ###

Wood kilogrammes 1.04 ###

###

Car kilometres 0.15 ###

Car (second person) kilometres 0.15 ###

Bus kilometres 0.08 ###

Train kilometres 0.04 ###

Air kilometres 0.05 ###

Air (No. of oneway flights per year) number 5.60

TOTAL CO2 released per year: 0.0 Tonnes (per person)

Kg of CO2 released % of your total CO2 emissions

HOME Energy Usage

TRAVEL Energy Usage

Fill in any relevant values in Column 2. If you are using a printed version you will then need a calculator to multiply these numbers by the factors in Column 3 to give Kg of CO2 released. Finally add the total of all the numbers in Column 4 to calculate your total carbon footprint.(See the notes page for more details.)

2. ‘Factors’ represent the number of kg of CO2 generated by 1 unit of the indicated energy source.

6. The Carbon Footprint can also be split up among individuals if their travel patterns vary.

3. The basic data required can be found on your utility bills (covering a 12 month period) or the number of kms you drive in a year etc.

4. An average factor for car travel has been included here. You may be able to enter a more accurate factor for your own car into the highlighted cells with reference to your Car Tax Certificate (NB Make sure you input the values in kg CO2 per km).

You can also check your car's CO2 emissions per km on this Sustainable Energy Ireland webpage.

5. Calculating emissions due to air travel is notoriously difficult. CO2 emissions associated with take off and cruising are significantly different – hence you are asked for total km flown (for cruising CO2) and number of flights taken (for take off CO2). For flight distances see the ICAO Calculator.

Only the airlines know exactly what the accurate factors should be for each flight. To avoid having to have a formula for each type of plane we based our factor on a typical Jet 738. With most modern planes this should be accurate to ±10%. (A more precise estimate is outside the remit of this Calculator.)

(The figure is based on the CO2 generated by the aircraft divided by the total no of seats (assumes load factor of 100%). Factor for Jet 738 taken from Data supplied by Peter Berdy, Sabre Airline Solutions and validated by Oxford University.)