Cost to Run an Electric Furnace Calculator

Estimate how much it costs to run an electric furnace based on wattage, daily usage, and your electricity rate. Use 15000 watts for 4 hours per day as a baseline for colder-weather heating loads.

Fast estimate No signup Updated for 2026 rates

Typical electricity cost

How much does an Electric Furnace cost to run?

Based on typical usage

An Electric Furnace typically uses about 15,000 watts, costing around $2.25 per hour at $0.15 per kWh.

At typical use (4 hours per day), that's about $270.00 per month and $1,350.00 for a typical 5-month heating season.

Per hour $2.25
Daily $9.00
Monthly $270.00
Heating season $1,350.00

Based on

  • 15,000 watts
  • 4 hours per day
  • $0.15 per kWh
  • 5-month heating season

What affects cost most

  • Heating runtime
  • Outdoor temperature and insulation
  • System size

How it works: Daily cost uses wattage, hours per day, and electricity rate. Monthly uses daily × 30; heating season uses monthly × 5.

Use the calculator below to estimate cost based on your own wattage, usage time, and electricity rate.

Calculator

1. Device

2. Usage

Quick presets

3. Rate

Enter your values and click Calculate Cost.

When this estimate is most useful

Electric furnaces are high-stakes pages because they can dominate winter electricity bills in all-electric homes.

Use this page to estimate what whole-home resistance heating costs before changing thermostat habits or comparing replacement options.

Example monthly costs

  • Light Use 2.4 hours per day
    $162.00/month
  • Typical Use 4 hours per day
    $270.00/month
  • Heavy Use 5.6 hours per day
    $378.00/month

Use this calculator when

  • Estimate the cost of whole-home electric resistance heat during colder months.
  • Check whether a thermostat setback or shorter heating window could materially change winter bills.
  • Compare electric furnace cost with a heat pump before planning a replacement.

Get a better estimate and keep costs down

Electric-furnace estimates should be built around realistic cold-weather runtime, not a flat yearly average that hides the seasonal spike.

What changes cost most

  • Heating runtime
  • Outdoor temperature and insulation
  • System size

How to get a better estimate and lower cost

  • Replace the default electricity rate with the actual rate from your latest power bill.
  • Adjust daily runtime to match how long you actually use the equipment.
  • Lower the thermostat when rooms are unoccupied.
  • Seal drafts and improve insulation before winter peaks.
  • Keep return vents open and filters clean.
  • Compare whole-home resistance heat against more efficient alternatives.

Electric Furnace FAQs

Why can electric furnace bills get so high in winter?

Resistance heating uses a lot of electricity for every hour of runtime, and whole-home heating hours accumulate quickly in cold weather.

Should I compare an electric furnace directly with a heat pump?

Yes. That comparison often tells you more than the raw furnace number by itself because both systems solve the same comfort problem with very different efficiency profiles.

Compare with related calculators

Use this page when you need to compare whole-home resistance heat with more efficient electric alternatives.

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