Conversion rates

Hi, has the meter units to gas volume units conversion factor changed since I went from a dumb to a smart mete?. If not, then my cost of gas use seems to have suddenly increased about 2.5 to 3-fold

99% certainty then that your old meter was an imperial one, where one unit equalled 100 cu ft of gas. The smart meter will be metric, where one unit equals a cubic metre of gas.
Conversion rate is times 2ยท83!
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