Energy Conversion Formula:
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Definition: This calculator converts gas units (as shown on your meter) to kilowatt-hours (kWh) using the calorific value of the gas.
Purpose: It helps UK households and businesses understand their actual energy consumption in kWh from gas meter readings.
The calculator uses the formula:
Where:
Explanation: The formula accounts for the energy content of the gas and converts it to the standard kWh unit used for billing.
Details: Gas meters measure volume, but energy companies charge for actual energy content. This conversion ensures accurate understanding of consumption.
Tips: Enter your gas units (from meter reading) and calorific value (default 38.5 MJ/unit, typical for UK). All values must be > 0.
Q1: Where do I find the calorific value?
A: It's listed on your gas bill or available from your supplier. The UK average is 38-42 MJ/unit.
Q2: Why is 3.6 used in the formula?
A: 3.6 converts megajoules (MJ) to kilowatt-hours (kWh), since 1 kWh = 3.6 MJ.
Q3: Do I need to account for imperial/metric units?
A: Modern UK meters measure in cubic meters (metric). For older imperial meters (cu ft), multiply by 2.83 first.
Q4: Is this calculation exact for my bill?
A: Energy companies may also apply a volume correction factor for temperature/pressure. Check your bill for details.
Q5: How often does calorific value change?
A: It varies slightly daily based on gas composition. Your supplier uses a weighted average for billing.