1. What is the British Gas Formula?

The British Gas formula calculates gas bills by converting cubic meters of gas used to kilowatt-hours using the calorific value, then applying the rate and adding any fixed charges.

2. How Does the Calculator Work?

The calculator uses the British Gas formula:

Where:

• \( m³ \) — Cubic meters of gas used
• \( CV \) — Calorific Value (MJ/m³)
• \( 3.6 \) — Conversion factor from MJ to kWh
• \( Rate \) — Price per kilowatt-hour (£/kWh)
• \( Charge \) — Fixed charge (£)

Explanation: The formula converts gas volume to energy content, multiplies by the unit rate, then adds any fixed charges to calculate the total bill.

3. Importance of Gas Bill Calculation

Details: Accurate gas bill calculation helps consumers understand their energy costs, budget effectively, and verify the accuracy of their gas bills from suppliers.

4. Using the Calculator

Tips: Enter cubic meters of gas used, the calorific value (typically provided by your gas supplier), the rate per kWh, and any fixed charge. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is calorific value (CV)?
A: Calorific value measures the energy content of gas, typically ranging from 38-41 MJ/m³. Your gas supplier provides this value.

Q2: Why divide by 3.6 in the formula?
A: This converts megajoules (MJ) to kilowatt-hours (kWh), as 1 kWh = 3.6 MJ.

Q3: Where can I find my gas rate?
A: Your gas rate is shown on your energy bill, usually expressed as pence per kWh. Divide by 100 to convert to pounds.

Q4: What is included in the fixed charge?
A: The fixed charge typically covers standing charges, daily supply charges, or other fixed costs that don't depend on your gas usage.

Q5: How often does the calorific value change?
A: The calorific value can vary slightly day to day based on the gas supply composition, but suppliers usually use an average value for billing.