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Heater Electricity Cost Calculator

Find out how much your electric space heater costs to run. This calculator estimates your daily, monthly, and yearly heating costs based on the heater's wattage and your usage pattern.

The power consumption of your heater in watts (most space heaters are 750-1500W)

Average hours you run the heater per day

Your electricity rate per kilowatt-hour

Number of days per month you use the heater

How to Use

1 Find the wattage on your heater label (common values: 750W, 1000W, 1500W)
2 Estimate how many hours per day you use the heater
3 Enter your electricity rate from your utility bill
4 View your estimated daily, monthly, and yearly heating costs

Formula

Daily kWh daily_kwh = wattage × hours_per_day ÷ 1000
Daily Cost daily_cost = daily_kwh × price_per_kwh
Monthly Cost monthly_cost = daily_cost × days_per_month
Yearly Cost yearly_cost = monthly_cost × 12

Example: 1500W Space Heater

A standard 1500W space heater running 8 hours per day at $0.12/kWh costs $1.44 per day, $43.20 per month, or $525.60 per year to run.

Why It Matters

Electric space heaters can be surprisingly expensive to run. A single 1500W heater running all day can cost over $4 per day. Understanding these costs helps you decide whether supplemental heating is worth the expense or if you should consider other heating options.

Who Uses This Calculator?

  • • Homeowners and renters estimating electricity costs, appliance usage, solar savings, or EV charging expenses.
  • • Solar shoppers, EV owners, and households comparing energy upgrades before requesting quotes or changing usage habits.
  • • Anyone who wants a quick estimate of home energy costs using clear assumptions.

Frequently Asked Questions

How much does it cost to run a 1500W heater for 24 hours?
At the US average rate of $0.12/kWh, a 1500W heater running 24 hours costs about $4.32 per day. That's roughly $129.60 per month if run continuously.
Is it cheaper to use a space heater or central heating?
It depends. If you only need to heat one room, a space heater can be cheaper than heating the whole house. However, if you need to heat multiple rooms, central heating is usually more cost-effective than running several space heaters.
Do all space heaters use the same amount of electricity?
No. Space heaters typically range from 750W to 1500W. Ceramic, oil-filled, infrared, and fan heaters all have different efficiencies and wattage ratings. Higher wattage means more heat but also higher electricity consumption.
How can I reduce my space heater electricity costs?
Use a programmable thermostat, heat only occupied rooms, improve insulation, wear warmer clothing, use a lower thermostat setting, and consider an energy-efficient model. Even lowering the thermostat by 1°F can save about 3% on heating costs.

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This calculator provides estimates for informational purposes only. Verify results with a qualified professional for important decisions.