British Gas calculation

Baldeagle095

Hopefully a simple question!
 Gas meter reading 18607.9   01/01/24
                                18795.3   29/02/24
Units used                   187.4

What factor and why do I need to apply to this figure to get the kWh figure of 2057.6.
This is then charged at 7.212p per kWh to get my usage amount of £148.39 which appears on my bill.
I note the electric charge on my bill is simply the meter reading times 27.34p per kWh.

I just want to monitor the costs on a spreadsheet as I have recently moved in and am in process of receiving a £500 refund from British Gas.

Not querying the overall bill...just how it is made up so I can monitor it easily on a spreadsheet.

Thanks


   

Robin9

Approx 11.2   -  it will vary day by day, hour by hour according to the calorific value of the gas. That give kWh -  then multiply by the tariff of 7.212 p/kWh.

Add VAT ?

PeterGr

Check on your meter if it is reading in ft3 or cu.m.  If in ft3 multiply the units by 2.83.  [ From the numbers you gave it is in cu.m ]

Then multiply the units by 1.02264 x calorific value / 3.6.  Calorific value varies and is shown on each bill.  Typically it is about 39.0.  So 1.0 cu.m of gas is about 11 kWh.

I use an average cv over the last year, until I receive the bill, when I update it to the actual value.

QrizB

Baldeagle095 said:

Hopefully a simple question!
 Gas meter reading 18607.9   01/01/24
                                18795.3   29/02/24
Units used                   187.4

What factor and why do I need to apply to this figure to get the kWh figure of 2057.6.

The simple answer is: 2057.6 divided by 187.4, which is 10.98.

The other replies tell you why it's 10.98, and since the calorific value of gas does vary it might not be quite that same number on future bills.

molerat

What factor and why do I need to apply to this figure to get the kWh figure of 2057.6.

The calculation will be shown on your bill.

I am not with BG but I suspect you will have this on your bill

* Your energy usage is calculated from your gas consumption using a standard
industry formula:
Unit consumed (cubic metres)
× Volume correction (for temperature & pressure)
× Calorific value (energy in each m3 of gas)
÷ 3.6 (convert from joules)
For you:
188.0 × 1.02264 × 38.0† ÷ 3.6 = 2029.4
†Average calorific value shown to one decimal place