Winter Heating Cost Estimator
Type in your own energy prices and see what each heater and appliance costs this winter.
A winter heating cost estimator for households on electricity, natural gas, propane or heating oil. Enter the prices on your own bills, list every heater and appliance, and see the cost per hour, per month and for the whole winter, plus what a change in hours or run time comes to on your numbers. One file, works offline, no login.
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One-time purchase, no subscription. Download link by email. Refund within 14 days if it doesn't help.
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.
Winter Heating Cost Estimator
Example prices and appliances, replace with your own
about $639
Nov-Mar for 5 appliances, about $128 a month, from the prices you enter
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.
Try it here
This is the demo build with sample numbers. Saving and export are switched off.
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What you get
- One big answer for your winter, such as "Nov–Mar: about $639 for these 5 appliances (about $128 a month)", with your biggest cost named
- Your own prices only: electricity per kWh or cents, gas per therm, ccf or m³, propane and heating oil per gallon, with no built-in tariffs
- Any number of appliances with watts or input BTU per hour, hours a day, the percent of that time it really runs (thermostat cycling), days a week and months used
- A what-if on every appliance: drag the hours or run time and see how the winter total changes on your numbers, for example $28.88 less in the sample for one hour less a day
- A ranked biggest-costs list, a month-by-month chart, an optional check against last winter's bills, and a one-page printout
Who it's for
Households heating with electricity, natural gas, propane or heating oil, especially renters with space heaters and people on a fixed income, who want to see what each heater and appliance adds to the winter bill before the cold snap arrives.
Questions
Does it know my utility's rates?
No. There are no built-in prices or tariffs. You type the rates from your own bill: dollars or cents per kWh, dollars per therm, ccf or cubic metre of gas, and dollars per gallon of propane or heating oil. That keeps it right for any state or country that uses those units.
What is the "percent of that time it runs" box?
A heater on a thermostat switches itself on and off, so it runs for less time than it is switched on. Enter your best estimate of the share of time it is actually heating. It starts at 100, which means it runs the whole time, and every cost uses it.
How does it price gas, propane and heating oil appliances?
You enter the input rating from the appliance's nameplate in BTU per hour. The tool turns that into therms or gallons using energy-content figures that you can edit. They start at typical values based on US EIA figures and are marked "check", so use your supplier's figure if you have one.
Will the total match my bill?
Not exactly. It is an estimate from the prices, ratings and hours you enter, and it only counts the appliances you list. Your real bill depends on the weather, your home and your utility's rates and charges. It is not energy, financial or safety advice. Follow the manufacturer's safety instructions for any heater.
Where is my data stored?
Only on your own device, in your browser. Nothing is sent anywhere and there is no account. Use Export to save a backup file and Import to move it to another phone or computer.
Does it work on my phone?
Yes. Each tool is a single file that opens in the browser on any iPhone, Android phone, tablet or computer. There's no app to install.
Where do my numbers go?
Nowhere. Everything you type stays on your own device. The tools work offline and never send your data anywhere.
Is there a subscription?
No. You pay once and keep the file. Fixes to the version you bought are free.
Pay once,
$9
You get the file, free fixes to version 1.0.0, and your money back within 14 days if it doesn't help.
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Read the refund policy