Power consumption and energy usage of Microwave oven

A microwave oven is used to cook or heat food and can be found in almost every kitchen. It passes electromagnetic waves through the food at a microwave frequency range. Microwave ovens are available in various sizes and capacities. The power consumption of a microwave oven ranges between 1000 watts to 3000 watts. A typical oven of 21 Litres oven consumes 1200 watts of power. Calculate the energy usage of the microwave oven below:

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

Energy usage of Microwave oven

Average duration of usage per day (Minutes):
Cost per unit*:(Global Electricity rates)
Electricity usage per day:
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 a microwave oven

Energy usage of Microwave Ovens

A typical microwave oven consumes 1.2kWh of energy per hour of usage. That means an hour of usage can cost you 14 cents.

A microwave oven works on the principle of bipolar heating caused by an alternating magnetic field. Water molecules present in the food are electric dipoles. These dipoles align themselves to the magnetic field. Since the field in a microwave oven is alternating in nature, these molecules constantly try to align themselves to the alternating field, thereby raising the temperature of the food.

Energy-saving while using a microwave oven

  • Microwave oven is already energy-efficient device.
  • The only way to save energy is to unplug the device whenever not in use.

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