How does the Home Energy Cost Calculator work?
The calculator multiplies monthly electricity kWh by the electric rate and natural-gas therms by the gas rate, adds other entered energy costs, then subtracts monthly credits. For a detailed electricity-only bill with fixed charges and percentage fees, use the Electricity Bill Calculator.
What should count as other energy costs and credits?
Other energy costs can represent recurring propane, heating oil, district energy or other household energy spending already expressed in dollars. Credits can represent a known monthly energy credit in your planning scenario. For solar-specific value, use the Solar Savings Calculator rather than guessing production.
How should you use the monthly and annual results?
The monthly result is a combined planning estimate from the values entered, and the annualized figure multiplies that monthly scenario by 12. To investigate a high electricity component, use the Appliance Energy Cost Calculator or Air Conditioner Energy Cost Calculator to isolate major loads.
Why can household energy costs vary by season?
Weather, heating and cooling demand, occupancy, utility rate changes and fuel prices can vary significantly through the year. For electric heating scenarios, use the Heating Cost Calculator and compare winter and shoulder-season assumptions separately.
Frequently asked questions about Home Energy Cost
It combines entered electricity cost, natural-gas cost, other monthly energy costs and monthly energy credits.
Monthly electricity kWh is multiplied by the entered $/kWh rate.
Monthly therms are multiplied by the entered $/therm rate.
Use it for monthly energy expenses already expressed in dollars, such as propane, heating oil or another household energy source.
Credits are dollar amounts you want subtracted from the modeled monthly energy cost.
No. It is a planning estimate and does not model every tariff, fee, tax or billing rule.
Yes, if entered credits exceed the entered energy costs. That would describe the mathematical scenario, not necessarily a utility cash payment.
Heating and cooling use can make monthly household energy consumption vary significantly across the year.
Sources and methodology
The calculator uses the transparent formula described on this page and the values you enter. These authoritative U.S. resources provide context for electricity, home energy, solar, efficiency or safety topics related to this tool.