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K
Rank 1
KKillen
Rank 1
February 28, 2026
Solved

Can someone help with the gas conversion to KWH

  • February 28, 2026
  • 13 replies
  • 145 views

On my recent bill I used 37.320 cubic meters of gas.  My house is unoccupied at the moment so only using minimal gas.

 

I followed the conversion calculation ;

 

37.32 x 43 x 1.02264 divided by 3.6  =  455.8588  kwh

 

However, on my bill it says energy use 1167.073  kwh and I was charged for 1167.073 kwh.

 

I don’t know where I am going wrong with my calculation.

Can anyone help me please.  I have tried to email OVO customer services but have not received a reply.

 

Thank you

Best answer by Firedog

Hi, that looks like they are using the calculation for an imperial meter. The x43 is towards the high end of the scale for calorific value …
    

Gas transporters are required to maintain the CV between 38 and 41 MJ/m³.

If you reverse engineer ​@KKillen‘s figures, assuming as you have done that Billing have made the common error of confusing readings in metric (m³) and Imperial (100 ft³) units, we can see that the average CV used for the period covered by the bill is:
  

            1167.073   x 3.6 kWh/MJ
____________________________________     = 38.9 MJ/m³
37.320 m³ x 1.02264 x 2.83 m³/100 ft³

  
The correct usage calculation is thus:

37.320 x 1.02264 x 38.9 ÷ 3.6 = 412.393 kWh.

[And, of course, just to be sure, 412.393 x 2.83 = 1167.073 
 

It may be better to use webchat (Mon-Sat) or messaging, e.g. on X (also on Sundays) rather than email to contact support: Methods for contacting OVO - (February/March 2026) | The OVO Forum

13 replies

BPLightlog
Super User
BPLightlogSuper User
Super User
February 28, 2026

Hi, that looks like they are using the calculation for an imperial meter. The x43 is towards the high end of the scale for calorific value so might not be correct but you should double check if you have an imperial or metric meter and then get things changed if needed 

 

Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
    C
    Rank 2
    costeek
    Rank 2
    February 28, 2026

    If it’s not the issue, please check if there is no any gas leak. Often our gas meters are outside of our flats, so it could go unnoticed. 

    K
    Rank 1
    KKillenAuthor
    Rank 1
    February 28, 2026

    On my recent bill I used 37.320 cubic meters of gas.  My house is unoccupied at the moment so only using minimal gas.

     

    I followed the conversion calculation ;

     

    37.32 x 43 x 1.02264 divided by 3.6  =  455.8588  kwh

     

    However, on my bill it says energy use 1167.073  kwh and I was charged for 1167.073 kwh.

     

    I don’t know where I am going wrong with my calculation.

     

    Even if I was being billed in error for an imperial meter then the calculation would be:

     

    Convert ft3 to m3  - 37.320  x 0.0283168   = 1.05678 cubic meters

     

    Then, 1.05678 x 43 x .01224 divided by 3.6 = .1545

     

    So, I do not think I am being billed on an imperial meter instead of a metric meter.

    Can anyone help me please.  I have tried to email OVO customer services but have not received a reply.

     

    Thank you

    K
    Rank 1
    KKillenAuthor
    Rank 1
    February 28, 2026

    On my recent bill I used 37.320 cubic meters of gas.  My house is unoccupied at the moment so only using minimal gas.  I have a metric meter.

     

    I followed the conversion calculation ;

     

    37.32 x 43 x 1.02264 divided by 3.6  =  455.8588  kwh

     

    However, on my bill it says energy use 1167.073  kwh and I was charged for 1167.073 kwh.

     

    I don’t know where I am going wrong with my calculation.

     

    Even if I was being billed in error for an imperial meter then the calculation would be:

     

    Convert ft3 to m3  - 37.320  x 0.0283168   = 1.05678 cubic meters

     

    Then, 1.05678 x 43 x .01224 divided by 3.6 = .1545

     

    So, I do not think I am being billed on an imperial meter instead of a metric meter.

    Can anyone help me please.  I have tried to email OVO customer services but have not received a reply.

     

    Thank you

    K
    Rank 1
    KKillenAuthor
    Rank 1
    February 28, 2026

    Sorry ,  just worked it out.  I have a ft3 meter and realised I have to multiply unit by 2.83 to get m3.

     

    Having a bad day!!!

      BPLightlog
      Super User
      BPLightlogSuper User
      Super User
      February 28, 2026

      It’s useful to keep your posts together on the same subject 

       

      Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
        BPLightlog
        Super User
        BPLightlogSuper User
        Super User
        February 28, 2026

        Same Q 

         

        Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
          C
          Rank 2
          costeek
          Rank 2
          February 28, 2026

          Why new topic? What was wrong with the previous one?

            Firedog
            Super User
            FiredogSuper UserSolved
            Super User
            February 28, 2026

            Hi, that looks like they are using the calculation for an imperial meter. The x43 is towards the high end of the scale for calorific value …
                

            Gas transporters are required to maintain the CV between 38 and 41 MJ/m³.

            If you reverse engineer ​@KKillen‘s figures, assuming as you have done that Billing have made the common error of confusing readings in metric (m³) and Imperial (100 ft³) units, we can see that the average CV used for the period covered by the bill is:
              

                        1167.073   x 3.6 kWh/MJ
            ____________________________________     = 38.9 MJ/m³
            37.320 m³ x 1.02264 x 2.83 m³/100 ft³

              
            The correct usage calculation is thus:

            37.320 x 1.02264 x 38.9 ÷ 3.6 = 412.393 kWh.

            [And, of course, just to be sure, 412.393 x 2.83 = 1167.073 
             

            It may be better to use webchat (Mon-Sat) or messaging, e.g. on X (also on Sundays) rather than email to contact support: Methods for contacting OVO - (February/March 2026) | The OVO Forum

            Noel | I have no official status; I'm just a volunteer who comes here to help other customers. My gear: Aclara SGM 1416-B Electricity-only E7 meter; Chameleon IHD3-PPMID-AAA | It may look as if I know what I’m talking about, but don’t let that fool you. |
              K
              Rank 1
              KKillenAuthor
              Rank 1
              March 1, 2026

              Thank you for your clear explanation - I fully understand now .

              Show more replies
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