What will your heaters and appliances cost this winter?
Type in the prices on your own energy bills, list each heater and appliance, and see what each one costs per hour, per month and over the whole winter, and what a change in hours or run time comes to on your own numbers. Nothing leaves this device.
Your winter estimate
Your winter
Add your prices
An estimate from the prices, ratings and hours you enter. Your real bill depends on the weather, your home and your utility's rates and charges. Not energy, financial or safety advice.
Your appliances
Add every heater and appliance you want to price. Open one to enter its numbers, see its cost and try a what-if. Follow the manufacturer's safety instructions for any heater.
Your energy prices
Copy these from your own bills. No prices are built in. If you loaded the sample, its prices are examples, so replace them with the rates on your bill. Leave a fuel blank if you don't use it.
A gas bill may list therms, ccf (hundred cubic feet) or cubic metres. Use whichever your bill shows.
Your winter
Which months to add up. February has 28 or 29 days depending on the year you pick.
Fixed monthly charges (optional)
Customer, service or delivery charges that don't change with how much you use. They are shown separately and are not added into the appliance totals.
Energy content for fuel appliances check
Typical values based on US EIA figures; use your supplier's figure if you have it. Leave a field blank to use the typical value shown in it.
The "therm factor" on a gas bill.
Worked out from EIA's 1,036 BTU per cubic foot.
Used only if you enter an electric heater in BTU per hour.
Your data
Everything saves on this device as you type. Use Export (top of the page) to keep a backup file.
Biggest costs this winter
Month by month
Check against last winter's bills
Optional. Type what your energy bills actually came to for these months last winter, all fuels added together. They are shown next to this winter's estimate and that's all. The estimate only counts the appliances you listed, while a bill covers everything on the account.