![]() The figure is then multiplied by 1.02264 as prescribed in the above regulations. Gas transporters must maintain this figure within 38 MJ/m³ to 41 MJ/m³ as figures outside of this range will cause problems with gas burning appliances. ![]() Calorific values vary and the figure quoted on your bill (eg 39.5 megajoules per cubic metre (MJ/m³)) will be an average of the gas supplied to your property (the regulations explain how this is calculated). This number is then multiplied by the calorific value of the gas, which is a measure of the available heat energy. This step is not required for metric meters as they are read directly in cubic metres. The conversion factor from cubic feet to cubic metres is 0.0283 therefore:įor imperial meters the reading (in hundreds of cubic feet) is multiplied by 2.83 to convert to cubic metres (if the reading is in cubic feet then this should be multiplied by 0.0283). Most suppliers bill monthly, but some quarterly – you may want to track your consumption more regularly. Subtract your previous reading from your current reading to give the number of units used over the period. So here is a complete guide to calculating the figures manually. While the calculator makes it easy to check, we think it’s important to understand how the calculations actually work. Imperial Meters (ft³) Enter gas units used Multiplier value Conversion factor Calorific value Unit price/ kWh If you have your meter readings to hand, enter your data into the gas bill calculator below to estimate your next bill. Readings are taken then converted to kilowatt hours (kWh) for billing purposes. It is a good idea to include any ‘zero’s’ in the reading provided to the supplier thus in the following examples: Example meter readings The numbers on a gas meter are always read left to right. Submitting your own reading may avoid the potential inconvenience of receiving an estimated bill, or building up an unnecessary credit with your supplier. If your supplier is unable to do this for any reason, we recommend that you take the reading yourself and provide it to the supplier. Your gas supplier should take regular readings of your meter, but this doesn’t always happen. Imperial (cubic feet)ġ Unit (the first number with a black border) is one cubic metre on a metric meter.ġ Unit (the first white number) is 100 cubic feet on an imperial meter. Older meters tend to be imperial, new and smart meters are metric. ![]() It should show on the display if it is in m3 (metric) or ft (imperial). Your gas meter could be imperial and provide data in hundreds of cubic feet or metric and provide data in cubic metres. Our gas calculator makes checking all your bills quick and easy. Checking your gas bill and ensuring that your supplier isn’t overcharging you is an important thing to do. ![]()
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