How'd you work out Gas consumption?

Smithmeister · 1 April 2008 at 9:43PM

Hi all,

I'm looking for a really easy way of working out my yearly gas consumption so i can compare my gas and electricity bill.
I am currently with ScottishPower on their capped rate which ends this month.
My Electricity consumption for the year is 5267 units and my gas is 629 units. So as far as ican see my electricity consumption is pretty straight forward but the gas is perplexing me slightly!

Any help and advice is greatly appreciated.

Smithmeister

withabix · 1 April 2008 at 9:47PM

2. Gas (kWh) - this is measured in units on your meter but paid for by kilowatt hour (kWh). To calculate how many kilowatt hours of gas you have used in each bill, take the number of gas units used (if you have an imperial meter, multiply the figure by 2.83), now multiply the gas units used by the calorific value (39.7) and the correction factor (1.022640), and then divide by 3.6.

In your case:

kWh = 629 x 39.7 x 1.022640/3.6 = 7093.51kWh (if metric meter)

x 2.83 if imperial

Cardew · 1 April 2008 at 9:52PM

There are 2 types of gas meter - Imperial and Metric

Imperial(the older type) measures in cubic feet. 1 unit is 100 cubic feet and approx 31kWh.*

Metric measures in cubic metres and 1 unit is approx 11.1kWh.

So you have used either 19,500kWh or 7,000kWh so you probably have an Imperial meter.

* can vary slightly depending on calorific value.

withabix · 1 April 2008 at 9:55PM

Cardew wrote: »

There are 2 types of gas meter - Imperial and Metric

Imperial(the older type) measures in cubic feet. 1 unit is 100 cubic feet and approx 31kWh.*

Metric measures in cubic metres and 1 unit is approx 11.1kWh.

So you have used either 19,500kWh or 7,000kWh so you probably have an Imperial meter.

* can vary slightly depending on calorific value.

You could be right.

My gas and electricity consumption over a year are approx equal in kWh however (well, certainly of similar magnitude anyway).

Smithmeister · 1 April 2008 at 10:30PM

Daft question
How do i know if i've got an Imperial or Metric?
It's a huge difference!!

Cardew · 1 April 2008 at 10:35PM

Smithmeister wrote: »

Daft question
How do i know if i've got an Imperial or Metric?
It's a huge difference!!

Look at the meter and it will say "cu ft" for an Imperial or M3(metres cubed) for metric.

This is normally in small print at the bottom of the dial.

Also look at your gas bill, if the number of gas units x 31 equals the kWh you are being charged for Imperial.

Smithmeister · 1 April 2008 at 10:43PM

Thanks Cardew,

Had a quick gander there and my meter has got FT3 so i assume that that is imperial as it is closer to cuft than M3?

Smithmeister · 1 April 2008 at 10:52PM

have had a look at my last bill and it reads:
Description Domestic Capped Start 9083 End 11 Units 208 Price(kwh@p) 6655@2.136 = £142.15 Standing charge 82 days @9.990 = £8.19 Total £150.34.

Maybe this will make it easier.

Cheers

Cardew · 1 April 2008 at 10:57PM

Yes it is Imperial. FT3 is Feet cubed!

On your latest bill 1 unit equals almost 32kWh.

So in the comparison site enter 20,000kWh

Smithmeister · 1 April 2008 at 11:20PM

Appreciate your help Cardew.
Imagine not getting cubic foot from FT3,what a numpty!

si_pritch · 4 January 2009 at 9:14PM

I'm a little confused.

I am trying to work out if our gas pre payment meter is overcharging us. According to my meter, I have used 41106 units in a given period, at a cost of £20. (it's in metric)

How do I work out how much that is in KWh and then how much each KWh has cost me, so that I can compare this to the quoted prices on British Gas' website?

I have a feeling something is not quite right here, especially since the originator of this post used 600 odd units in a year!

Thanks in advance - having lurked here for a little while, I know that reponses are always helpful and informative!!

How'd you work out Gas consumption?

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