Natural Gas Cost Calculator
Calculate natural gas utility bills from Therms, CCF, MCF, MMBtu, or cubic meters with automatic heat-content unit conversions and customer fees.
Natural Gas Consumption & Pricing
65.00 Therms (62.68 CCF / 6.50 MMBtu)
Natural Gas Bill Formula
Total Gas Bill = (Usage Converted to Rate Unit ร Price per Unit) + Fixed Customer Fee + Delivery Fee- 1 Therm = 100,000 BTU of heat energy = 0.10 MMBtu (Dekatherm).
- 1 CCF (100 cubic feet of natural gas) โ 1.037 Therms based on the US EIA national average heat content (1,037 BTU/ftยณ).
- 1 MCF (1,000 cubic feet) = 10 CCF โ 10.37 Therms; 1 Cubic Meter (mยณ) โ 0.3662 Therms.
Step-by-Step Worked Example
Calculation Steps:
- Convert 75 CCF to Therms: 75 ร 1.037 = 77.775 Therms
- Estimated Usage Cost = 77.775 Therms ร $1.40 = $108.89
- Total Estimated Gas Bill = $108.89 + $15.00 = $123.89
How to Use This Calculator
- 1Enter your natural gas usage reading and select the unit shown on your meter (Therms, CCF, MCF, MMBtu, or mยณ).
- 2Enter your combined gas supply and delivery unit price and select the billing unit.
- 3Include your utility fixed monthly customer charge and any flat regulatory fees.
Assumptions & Limitations
- Volumetric-to-thermal conversions use the US EIA standard heat content factor of 1.037 Therms per CCF (1,037 BTU/ftยณ).
- High-altitude regions or specific pipeline blends may have slightly different BTU heat factors listed on the statement.
Frequently Asked Questions
What is the difference between CCF and Therms on a gas bill?
CCF measures gas volume (100 cubic feet), while a Therm measures heat energy (100,000 BTU). Utilities multiply metered CCF by a heat content factor (typically ~1.037) to bill you in Therms.
Should I enter the supply rate or total bundled rate per Therm?
For the most accurate bill estimate, combine your commodity gas supply rate and your volumetric distribution/delivery rate per Therm, then enter fixed monthly charges separately.
How many Therms does a typical household use?
Usage varies heavily by season: a household using gas for water heating and cooking may use 15โ25 Therms/month in summer, rising to 80โ150+ Therms/month in winter when space heating is active.
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