need help to work out my gas usage

tk

i have recently swapped to powergen and have no idea how they work out your gas bills?
i have used 133 more units from my opening reading much does that work out at on the energyonline tariff.
thanks

f107btx

multipiy by 1.02264*2.83*(calorific value)(40.1 in my case)/3.6=428kwhs*.01599=£6.84+standing charge £4.34 Per Quarter

f107btx

oops sorry should be 4287 kwhs=£68.55

tk

OMG! i have used £68 in a month and have hardly had the heating on? you have to be kidding me!!! HELP!

djohn2002uk

First you have to determine if your meter is of the old imperial type or the newer metric type. If it has dials its the old type but if it has plain numbers with a small rectangle on the right it is metric. If it's the old type you multiply by 2.83 first.
I'm assuming it's metric so:- 133 x 39.1 x 1.02264 / 3.6 =
1477 kW/H and that equals £23.62 if the unit cost is 0.01599p (I haven't checked the unit price)
The above post has assumed it to be an imperial meter

f107btx

Powergen Standard Paid Quarterly

1st 1143 kwhs=2.267p
rest @ 1.803p

My meter is metric and i use above method of calculating gas usage and billing.If that method is wrong i want a huge rebate from my gas supplier.

tk

ok so i have used around 30 quid of gas and hardly had the heating on. we use gas for kettle and hob cooking and shower via combi bolier, heating as stated on approx 3 hours a day!! blimey its going to be a cold winter in this house my poor babies!

djohn2002uk

The 2.83 figure is used solely to change the reading from imperial to metric. 100cubic feet = 2.83cubic metres. I obtained this information direct from British Gas and it was confirmed by Scottish Power and Powergen.
This is taken from the UKPower website:-

Converting Units to Kilowatt Hours
Electricity consumption is usually already stated in kilowatt-hours on previous bills, so the electricity kWh's figure is ready to use.

Gas units need to be multiplied by 31.3 to convert from the units used according to the meter or bill, to kilowatt-hours. Then the gas kWh's are ready to use. This is a rough estimate and the exact conversion details are below. (Or, for rough figures, multiply by 100, then divide by 3).

(To convert gas units to kilowatt hours: gas units used x imperial to metric conversion factor (2.83) x volume conversion factor (1.022640) x calorific value (39.7) divided by kilowatt hour conversion factor (3.6) = kilowatt hours used.)( This is the same as: gas units used x 31.3 = kilowatt hours used).

If you have a metric meter, you do not need to use the imperial to metric conversion factor (2.83). In this case, the rough estimate is to multiply the metric units by 11 instead of 31.3.