Comment from: Clive Purmah [Visitor] Email
Clive PurmahBrilliant!!

An hour on the phone to BG to get this answer but the adviser stil couldn't tell me!

All I wanted to know was how they calculated how many kwh's were charged in tier 1 and how many in Tier 2.. It's different on every statement and now I know why.

Many thanks, however,do you have any idea how to calculate how many kwh's I will be charged for in each for tier for electric. This formula doesn't appear to work but I have Economy 7.... 2 Tiers and a night reading!!


22/03/11 @ 22:42
Comment from: Value hunter [Member] Email
Value hunterI've not forgotten about your request Clive, I have the formula used to calculate electricity prices, I'll try and get it posted this evening
28/03/11 @ 14:07
Comment from: Jakub [Visitor] Email
JakubCould you explain step 2?

I don't get, why the conversion is 2.83. According to this page ( and my knowledge feet is a smaller than meter, so it should be 0.0283.

Gets me really confused.
03/11/12 @ 18:33
Comment from: Value hunter [Member] Email
Value hunterHi Jakub,

This direct from British Gas, this is the standard calculations template, a copy of which I received after numerous requests and comes from, I believe, British gas' back office and is used by British gas' billing staff.

"If the customer has a 4 dial (imperial) meter, you need to convert the imperial units (HCF) to metric units (M3).

If the customer has a metric meter you can leave this step out and move straight onto Step 3.

Imperial units (HCF) x 2.83 = Metric units (M3)"

Took a while to find the original message, but got there in the end. Hope this helps
04/11/12 @ 02:29
Comment from: Pete [Visitor]
PeteGOOD, except step2

1ft³ = 0.028316846m³

check on the following website:


07/11/12 @ 10:38
Comment from: Value hunter [Member] Email
Value hunterThanks for that, just waiting for British Gas to get back to me to confirm...
Hope this doesn't open a can of worms!
07/11/12 @ 15:20
Comment from: Value hunter [Member] Email
Value hunterConfirmation from British Gas;

"Yes we multiply the number of units used (in hundreds of cubic feet) by 2.83"

So the formula I posted here is used and accurate for British gas billing...
07/11/12 @ 17:14
Comment from: djidji [Visitor]
djidjihi,my friends.Shall I ask you to help me.I can't calculate my gas bill,if somebody help me I would be grateful.Mu current gas meter is 00822 m3...I wanna help,please.Thank you
02/04/14 @ 14:39
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