Gas cost$84.00
Therms60
Energy in kWh1,758 kWh
Energy in BTU6,000,000
CCF57.86
This is the gas supply charge only. Your bill also has a fixed customer charge, delivery charges and taxes — add those for the full total. The therms-per-CCF factor (heat content) is printed on most bills and changes slightly from month to month.
Therms, CCF and cubic meters
US gas bills measure gas either in therms (an energy unit) or in CCF — 100 cubic feet (a volume unit). One therm is 100,000 BTU, or about 29.3 kWh. How many therms a CCF contains depends on the heat content of the gas that month; it is usually around 1.03–1.04 and is printed on the bill as a therm factor or BTU factor. One cubic meter is 35.31 cubic feet.
How to calculate your gas cost
Cost = gas used × price per unit. If your bill is in CCF but the price is per therm, convert first: therms = CCF × therm factor. Example: 58 CCF × 1.037 = 60.1 therms; at $1.40 per therm the gas supply costs about $84.
Worked example
A household used 60 therms in a month at $1.40 per therm: 60 × 1.40 = $84.00 for the gas itself. That is 60 × 29.3071 = 1,758 kWh of energy, or 6 million BTU.
What else is on the bill
The calculator covers the gas supply cost. Utility bills also include a fixed monthly customer charge, delivery or distribution charges, and taxes and fees, which can be a large share of a small bill. Add them to compare with your total.
Frequently asked questions
How many kWh are in a therm?
One therm equals 100,000 BTU, which is about 29.3 kWh.
What is the difference between a therm and a CCF?
A therm measures energy (100,000 BTU); a CCF measures volume (100 cubic feet of gas). One CCF typically contains about 1.03–1.04 therms, depending on the gas quality — your bill shows the exact factor.
How many therms does a house use per month?
It varies widely with climate, home size and whether gas is used for heating. Summer use for water heating and cooking can be under 20 therms, while winter heating months can exceed 100 therms. Check your own bill history for the best estimate.
Can I use cubic meters?
Yes. Choose cubic meters and the calculator converts through cubic feet and the therm factor.