About Housenergy Calculator

Housenergy Calculator is a set of free calculators that help US homeowners estimate what their appliances, heating and cooling cost to run. The site is written and maintained by the Team of Housenergy Calculator.

What you will find

• Calculators that show their formula and worked examples next to the result.
• Data from public sources, such as the U.S. Energy Information Administration, with the source and date shown.
• Plain explanations of what a calculator leaves out, so you know how far to trust the number.

How the calculators are made

Text and code are drafted with the help of AI tools. Every formula and every figure is then checked by a person against its source and tested with known cases before it is published. Read the details on the methodology and sources page.

What we do and do not do

• We show the formula, the inputs and a worked example for every calculator, so you can check the number yourself.
• We cite the source and the date of every price, efficiency level or conversion factor, and we say when a figure is an average that may not match your bill.
• We do not invent defaults. When no reliable public figure exists, the calculator asks you to type your own value instead of guessing one.
• We do not give professional advice. Our results are estimates, not a load calculation, a quote or an engineering design. See the disclaimer.

How the site is funded

The site is free to use. It is meant to be paid for by advertising from Google AdSense. Ads, when they appear, are labeled and kept away from the calculator itself, and we do not take payment to change a result or to recommend a product. Theprivacy policy explains how advertising and cookies work.

Contact

Questions, corrections or suggestions: see the contact page.