Calculating cost of gas usage

Curry_Queen

Apologies if this has been covered before but I couldn't find anything via the search facility, but does anyone have the formula for calculating the cost of gas usage please?

I'm sure they used to give the formula on gas bills but I don't have one to hand as I've been on paperless billing for some time and couldn't find anything via Google either.

Cheers

Cardew

There are slight variations because of the calorific value of the gas.

The BG site is currently being upgraded so off-line for paperless billing customers but it does show that formula when you look at the detailed bill. However:

If you have a metric meter each unit is approx 11.2kWh.

If you have an Imperial meter each unit is 2.83 times more e.g. 32kWh

f107btx

Try this site should tell you what you want to know

http://www.ukpower.co.uk/staywarm.asp

Curry_Queen

f107btx wrote:

Try this site should tell you what you want to know

http://www.ukpower.co.uk/staywarm.asp

That's exactly the sort of thing I was looking for, thank you very much :A

Cardew

f107btx wrote:

Try this site should tell you what you want to know

http://www.ukpower.co.uk/staywarm.asp

I think that is an old page of the site. It is a pity it doesn't explain clearly that there are 2 types of gas meter. The calculation it gives is for an Imperial meter.

It is not clear that for a metric meter(the majority?) you don't need to use the 'imperial to metric conversion factor' of 2.83.

Using their figures:

For Metric meters multiply units by 11.28 to get kWh.
For Imperial meters multiply units by 31.92 to get kWh.

Bri_2205

Bear in mind that it may not be 100% accurate as the gas calculation uses a calorific factor. This is basically the quality of gas for that period and can vary slightly from quarter to quarter.

Curry_Queen

Cardew wrote:

I think that is an old page of the site. It is a pity it doesn't explain clearly that there are 2 types of gas meter. The calculation it gives is for an Imperial meter.

It is not clear that for a metric meter(the majority?) you don't need to use the 'imperial to metric conversion factor' of 2.83.

Using their figures:

For Metric meters multiply units by 11.28 to get kWh.
For Imperial meters multiply units by 31.92 to get kWh.

That sounds more like it! I was getting horrendously high figures using the calculations from that site (imperial) so I'm assuming my meter is metric as it concurs with units used and costs at my previous property

Cheers :A

Cardew

Bri_2205 wrote:

Bear in mind that it may not be 100% accurate as the gas calculation uses a calorific factor. This is basically the quality of gas for that period and can vary slightly from quarter to quarter.

As stated in Post #2

Cardew

Curry_Queen wrote:

That sounds more like it! I was getting horrendously high figures using the calculations from that site (imperial) so I'm assuming my meter is metric as it concurs with units used and costs at my previous property

Cheers :A

If you look at your meter it is Metric if it has m3 which is for cubic meters.

Imperial have ft3 for cubic feet

f107btx

Cardew wrote:

I think that is an old page of the site. It is a pity it doesn't explain clearly that there are 2 types of gas meter. The calculation it gives is for an Imperial meter.

It is not clear that for a metric meter(the majority?) you don't need to use the 'imperial to metric conversion factor' of 2.83.

Using their figures:

For Metric meters multiply units by 11.28 to get kWh.
For Imperial meters multiply units by 31.92 to get kWh.

In my part of the country metric *11.19
Imperial *31.67

Curry_Queen

I only needed it to do a rough cost calculation for my budget planner so very slight differences don't really matter

Thanks anyway