How Many Watts Does a Space Heater Use?

Space heaters are a common appliance in many homes, especially during the colder months.

But how much power do these heaters use?

In this article, we’ll break down the average wattage, amperage, and cost of running various types of space heaters.

How Many Watts Does a Space Heater Use?

The wattage of a space heater can vary greatly depending on its type and size.

However, many common electric space heaters, including ceramic heaters and infrared heaters, use around 1,500 watts of electricity on their highest setting.

Smaller personal heaters might use less power, around 200 to 500 watts, while larger heaters designed for bigger rooms can use up to 3,000 watts.

How Many Amps Does a Space Heater Use?

The amperage drawn by a space heater can be calculated by dividing its wattage by the voltage of your power supply (often 120V in the US). So, a standard 1,500-watt heater would draw about 12.5 amps of power on the highest setting.

How Many Amps Does a Space Heater Use on Low?

On lower settings, a space heater will use less amperage. If we assume the low setting uses half the power of the high setting, a typical 1,500-watt heater would draw around 6.25 amps on the low setting.

Do Space Heaters Use a Lot of Electricity?

Space heaters can use a significant amount of electricity, especially when used continuously over long periods.

The exact power consumption depends on the type of space heater, its wattage, and the duration it’s in use.

Are All Space Heaters 1500 Watts?

No, not all space heaters are 1500 watts. While 1500 watts is a common rating for many residential space heaters, the wattage can vary. Smaller heaters might use less, and larger space heaters or oil-filled heaters can use more.

How Much Does it Cost to Run a 1500W Space Heater Use Per Day?

The cost to run a 1,500-watt space heater per day depends on the cost of electricity in your area and the number of hours per day the heater is in use.

On average, a 1500-watt heater running for 24 hours would use 36 kWh. If electricity costs are $0.12 per kWh, for example, it would cost about $4.32 per day.

How Much Does it Cost to Run a 1500W Space Heater Use Per 8 Hours?

Assuming the same cost of electricity ($0.12 per kWh), running a 1500-watt space heater for 8 hours would consume 12 kWh, costing about $1.44.

How Much Does it Cost to Run a 1500W Space Heater Use Per Week?

Following the same calculation, if you run the 1500-watt heater for 8 hours a day, every day of the week, it would cost about $10.08 per week.

How Much Does it Cost to Run a 1500W Space Heater Use Per Year?

For a year, using the heater 8 hours a day for 365 days, the cost would be approximately $525.60. Remember, these calculations are estimates and the actual costs will depend on your specific electricity rates.

How to Save Money When Using a Space Heater?

There are a few ways to save money on heating costs when using a space heater:

  1. Use the Heater Strategically: Instead of heating the entire home, use the heater in the room you are using.
  2. Optimize the Thermostat: Lower the central heat and use the space heater to provide additional heat where needed.
  3. Maintain Your Heater: Regular cleaning and maintenance of the heater can improve its efficiency and performance.
  4. Choose an Energy-Efficient Model: Look for heaters with energy-saving features such as thermostat control, low power modes, or timers.


Space heaters can significantly increase your electricity bills if used constantly. It’s important to consider the power consumption of a space heater before purchase and to use it wisely to minimize energy costs.

Remember, these calculations are estimates, and actual costs can vary based on factors like the exact wattage of your heater, the cost of electricity in your area, and how long you’re running the heater each day.

About Roy Cohen

Roy Cohen has a burning passion for heating, cooling, and ventilation. He aims to help you save money on expensive repairs and bring you the best HVAC products. He has years of experience behind him in HVAC repair and garage maintenance.

You can find Roy at his LinkedIn or his email: [email protected]

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