Estimate a natural gas bill using direct usage or explicit meter readings, matching billing units and rates, fixed charges and optional tax. Results are estimates, not exact supplier invoices.

Use the same billing unit for usage and both per-unit rates.

USD estimate using one flat supply rate, one flat delivery rate and tax on the full subtotal. Actual tariffs, taxable items and line-item rounding may differ.

Changing this selection reinterprets the numbers; it does not convert usage, readings or rates.

Charges, tax and billing days

Optional; blank means zero.

Blank means zero. Enter the full period charge; no proration is applied.

Optional; blank means zero.

Optional; blank means zero. Adjust your inputs if some charges are exempt.

Optional; blank uses 30 days for daily averages.

Gas Bill Formula

For the supply-only examples below, multiply gas usage by its matching per-unit supply rate. The calculator can also add delivery, period charges, other fees and tax on the full subtotal.

GB = TG × CG
  • Where GB is the Gas Bill ($)
  • TG is total gas usage; the examples use MCF (1,000 cubic feet). Select MCF to reproduce them.
  • CG is the supply rate in USD per matching unit; the examples use USD per MCF.

Supply cost = usage × supply rate. The calculator’s total = (supply + delivery + period customer charge + other fees) × (1 + tax percentage / 100). Optional charges and tax are zero when blank. Billing days affect daily averages only, defaulting to30 when blank; fixed charges are not prorated. Therms are energy and CCF/MCF are volume: changing the billing-unit selection reinterprets entries and does not convert them.

How to Calculate Gas Bill?

The following example problems outline how to calculate Gas Bill.

Example Problem #1:

  1. First, determine the total gas used (1000 cubic feet).
    • The total gas used (1000 cubic feet) is given as 14.
  2. Next, determine the cost of gas ($/1000 cubic feet).
    • The cost of gas ($/1000 cubic feet) is provided as 13.50.
  3. Finally, calculate the Gas Bill using the equation above: 

GB = TG * CG

The values given above are inserted into the equation below and the solution is calculated:

GB = 14 * 13.50 = 189.00 ($)

Example Problem #2: 

For this problem, the variables needed are provided below:

total gas used (1000 cubic feet) = 16

cost of gas ($/1000 cubic feet) = 14.60

This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer. 

GB = TG * CG = ?