Free · US energy references · Explicit reporting dates
Natural Gas Cost Calculator
Use measured Mcf consumption or calculate required fuel from useful heat, energy content and efficiency. EIA averages are dated references, not your supplier price. Gas Mcf means 1,000 cubic feet; therms are energy units and must not be entered as Mcf.
Your consumption and costs
Choose one consistent reporting period. Use a decimal point and optional comma thousands (1,234.56). Zero means intentionally zero.
Results
Enter your figures and calculate.
How this calculation works
Fuel units = measured fuel OR useful thermal kWh × 3412.14163312794 Btu/kWh ÷ (Btu per fuel unit × efficiency%); fuel cost = fuel units × matching USD per unit.
Worked example
Illustrative figures, not current rates. Use Load illustrative example to inspect every input.
- Calculated consumption in the chosen period
- 10 Mcf
- Energy or fuel cost at entered price
- 150 USD
- Cost at comparison price
- 180 USD
- Change caused by comparison price
- 30 USD
- Total period cost including entered other costs
- 150 USD
- Modeled useful heat delivered
- 2732.594658 kWh thermal
- Energy cost per useful thermal kWh
- 0.054893 USD/kWh thermal
Use the results responsibly
- All figures refer to one user-chosen period. These are energy-cost scenarios, not complete utility bills or supplier offers.
- Electricity/natural-gas reference averages are monthly and published with a lag. Propane/heating-oil prices are seasonal reported averages excluding taxes.
- Do not add a fixed bill component again if the supplied average already includes it. Actual tariffs may have tiers, minimum charges, demand charges, taxes and credits not modeled here.
- Heat-content examples are approximate. Confirm the correct fuel grade, composition, heat content, efficiency and unit against your own documents.
Sources, units and permitted reuse
- EIA reuse policy: EIA-produced data may be reused; source/date attribution is retained. No government endorsement.
- EIA heat-content and energy conversion examples. Fuel factors vary by product and year; enter your supplier factor where available.
- EIA Electric Power Monthly, Natural Gas data, and Heating Oil and Propane Update.
Calculations run on your device. No quantities or bill amounts are sent to EIA. Reference requests retrieve fixed public report URLs through BusCalc. Nothing saves automatically; downloaded receipts are unsigned, editable records of supplied inputs, not certified bills. Full specialty reports are not automatically included in paid packages.