If you do not know how much electricity you use, you may like to use the following as a guide:

• Small house 1,650kWh per year
• Medium house 3,300kWh per year
• Large house 4,950kWh per year

If you use electricity for night storage heaters and your hot water, please double these figures

If you are on a "green electricity" tariff, you may choose to leave this blank

When calculating your emissions from the amount that you spend, the calculation is based upon a typical energy cost.

Figures are taken from Defra's Guidelines for reporting greenhouse gas emissions, updated July 2005

If you do not know how much gas you use, you may like to use the following as a guide:

• Small house 10,000kWh per year
• Medium house 20,500kWh per year
• Large house 28,000kWh per year

Figures are taken from Defra's Guidelines for reporting greenhouse gas emissions, updated July 2005

If you use bottled gas and wish to include this in your offset please enter the number of litres you have used. We use an emissions figure per litre provided by Defra.

If you use heating oil and wish to include this in your offset please enter the number of litres you have used. We use an emissions figure per litre provided by Defra.