Power consumption and energy usage of space heaters

A space heater or room heater is used to heat up an enclosed space such as a room, office, etc. It can be electrically powered or by burnable fuels. You can calculate the energy usage of space heaters here. The power consumption of space heaters ranges from 700 watts to 3000 watts. A typical water heater consumes 1500 watts of power.

Enter the wattage, hours of usage, and cost per kWh. The energy usage calculator for the space heater gives you the total energy consumed by them. Also, you can find how much power your space heater consumes.

Energy usage of space heaters

Average usage hours per day:
Cost per unit*:(Global Electricity rates)
Electricity usage per hour:
Electricity usage per day:
Usage cost per hour:
Usage cost per day:
Usage cost per month:
Usage cost per year:
*The cost is currency independent and same that of cost per unit input given.

Terms and definitions:


Power usage of the device in watts as mentioned on its label.

Cost per unit:

The average cost per unit charged by the electric utility. Every country has different tariff rates. Visit: Global Electricity prices for details if you don’t know how much the utility company charges you per unit or kWH.

Units per day:

The number of units of electricity consumed by the load every day considering the entered operation hours.

Hours of usage:

The number of hours the load is used per day.

The electricity usage depends on the wattage and the number of hours of usage. The utility company charges you for the total kilowatt-hour of energy you have consumed. Kilowatt-hour is the product of the power consumption of the load and the number of hours of usage.

Power consumption of water heater

A typical water heater consumes 1.5kWh of energy per hour of usage. That means an hour of usage can cost you 0.18 cents.

Energy usage of space heaters

A space heater consists of a heating element. When powered up the current flow through the element causing it to become hot. This heat is transferred to the surrounding air. The heating element can be metallic or ceramic. Some space heaters consist of fans that continuously circulate warm air throughout the closed space.

Energy-saving tips for space heaters

  • Buy an energy-efficient space heater.
  • Heat insulate your room.
  • Replace the old space heater with a new one.

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