Gas Bill Estimator
Estimate your bill from gas usage, price per therm and fixed charges.
About Gas Bill Estimator
The volume of gas used multiplies the unit price to get the usage portion, and the fixed delivery charge is added on top. Gas bills swing with winter usage, so estimating the total helps avoid bill shocks and lets you compare providers.
Formula
Gas Bill
Total = therms x price per therm + fixed charge
- therm
- A unit of natural gas heat equal to about 100,000 BTU
Worked example
With the default values below, Gas Bill Estimator returns Total Bill of $110.00. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Gas usageminimum 0 therms
- 60 therms
- Price per thermminimum 0
- 1.5
- Fixed chargeminimum 0
- 20
Results
- Usage Cost
- $90.00
- Total Bill
- $110.00
- Annual Bill
- $1,320.00
Step by step
- 1Values used
- 2Gas Bill
- 3Total Bill= 110.00
- 4Usage Cost= 90.00
- 5Annual Bill= 1,320.00
Assumptions and limits
- The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Gas Bill calculated?
Total = therms x price per therm + fixed charge The volume of gas used multiplies the unit price to get the usage portion, and the fixed delivery charge is added on top.
Why does Gas Bill matter?
Gas bills swing with winter usage, so estimating the total helps avoid bill shocks and lets you compare providers.
What values do I need to enter?
This calculator takes 3 inputs: Gas usage, Price per therm, Fixed charge. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.