Gas meters either record your consumption in ft3 or m3.

This page allows you to automatically convert m3 to kWhs. If you check your gas meter you will see what type you have as it will be noted clearly beside the reading.

If you enter your postcode we will also calculate the cheapest gas cost available to your home for that consumption of gas.

For Gas Meters that record cubic meters (your gas meter will have m3 beside the reading)

Enter your usage

To calculate this figure take your current meter reading and deduct the previous reading.

Correction Factor

The correction factor is used to take account of the temperature and atmospheric conditions at a site. It is generally of the order of 1.02264, so we have defaulted to this.

Calorific Value

The calorific value (CV) is a measurement of the amount of energy contained in the gas. CV is usually quoted in megajoules per cubic metre (MJ/m3). Gas delivered to your premises will have a CV of between 37.5 MJ/m3 and 43.0 MJ/m3.This is continually measured by Transco for each Local Distribution Zone and passed to your gas supplier daily We have defaulted to 40.0 but you can change this.

Property Postcode


This will convert your gas consumption from cubic meters to kWhs.