How Many Amps Does A Microwave Use -
Appliance Energy-Saving Tips

User Guide: Here’s How Many Amps Your Microwave Uses

Written by

Jason Carter

User Guide: Here’s How Many Amps Your Microwave Uses

Be honest:

You are curious to know “how many amps does a microwave use?” Also, wouldn’t it be great to have a good idea about how much it costs to use your microwave?

Of course, it would.

This information is always important when planning your home’s electrical setup or simply trying to budget for your energy needs.

That said:

Do you know how to calculate the amperage and the costs that come with it?


Don’t worry, we’ve got you covered. Here’s everything you need to know about this and more…

How Many Amps Does A Microwave Use?

Microwaves typically use between 5.4 and 10 amps with a power rating of 600 to 1200 watts. Researching product details and calculating the amperage of your microwave is important. It allows you to determine how many amps it consumes and the cost of running it.

Amperage and Voltage

To begin with:

An amperage (amp) is an electrical power measurement unit. It describes the rate at which electrical current flows through a system.


Voltage can be described as the pressure required to propel electrons within a conducting path or electric field.

What’s more?

Higher amperage usually means more power, but amperage and voltage work together to produce the final output.

Microwave Amp Usage Calculation: Step-by-Step Process

Step 1: Check Product Specifications

Hamilton Beach Microwave Product Specifications

First off:

Since not all microwaves are the same, you should know specific details about your microwave before calculating.

Now get this:

The wattage and voltage of your microwave are the two most important things you should know. Although wattage varies widely, most microwaves operate at 120 volts with minor variations.

The amount of amps your microwave uses is determined by your microwave’s wattage and volt outlet.

Pro tip:

You can learn essential information about your microwave by checking the user manual.

If the manual is not available, do some research online or contact customer support for your microwave model.


If you consult the internet for this information, be careful to avoid getting watt and voltage values for models with similar features but different power specifications.  

Step 2: Divide the Wattage by the Voltage

Microwave Hamilton Beach 1000w

Here’s the thing:

You can get the exact amperage your microwave uses by dividing the wattage by the voltage.

For instance:

If your microwave is rated at 600 watts with a voltage of 120, it will use 5 amps.


An 800-watt microwave with a 120-volt capacity requires ~7 amps. While a 1200-watt appliance needs 10 amps at a 120-Volt Rating.

You get the point, right?


These amperage results have been rounded up to the nearest whole number to keep things simple.


High-wattage microwaves heat food quickly and save time. But they are more expensive and consume more electricity than low-wattage models.

How Much Does It Cost to Use a Microwave?


Microwaves use electricity and that costs money. However, since most of these appliances consume little electricity, it has minimal effect on the power bill.

Here’s how it goes:

To determine the cost of running a microwave, first identify the unknown variables. Specifically, the cost of electricity and the average daily use time.

These figures may vary depending on how often you use your appliance.

Once you identify the variables, you can calculate how much it costs to use a microwave daily, monthly, or yearly.

For Example…

How many amps does a 1000-watt microwave consume? And how much will it cost me daily/monthly/yearly at an average price of $0.01/KWh for energy?

Let’s find out:

A 1000-watt microwave rated at 120V consumes ~9 amps.

Using an estimated daily usage of 15 minutes and the cost of electricity at $0.10/KWh (10 cents per KWh), we will calculate the cost of using a microwave with the steps below:

  • Step 1: Determine the average daily use: let’s say 15 minutes.
  • Step 2: Calculate the daily wattage use by multiplying the wattage by the hours used daily: 1000 watts x 0.25 hours = 250 watts/h.
  • Step 3: Convert the result to kilowatts: 250 watts/1000 = 0.25 KWh.
  • Step 4: To calculate the daily cost of using a microwave, multiply the result by the cost of electricity – 0.25 KW x $0.10 = $0.025 daily.
  • Step 5: To calculate the monthly cost ofusing a microwave, multiply the daily cost by 30 days: $0.025 x 30 = $0.75 monthly.
  • Step 6: To calculate the yearly cost ofusing a microwave, multiply the monthly cost by 12 months: $0.75 x 12 = $9 yearly.

Alternatively, you can multiply the daily cost by 365 days: $0.025 x 365 = $9.125 yearly.

It’s a no-brainer!

Pro tip:

If you’re looking to conserve energy or want your food to heat up quickly, do this…

When cooking in the microwave, use a suitable container and cover your food. Additionally, when heating, rotate your food to ensure even heat distribution. Also, avoid opening the door unnecessarily to shorten cooking times.

Importance of Finding the Amps and Cost of Running Your Microwave

For starters:

Knowing your microwave’s amperage is necessary because it improves safety and protects your appliance from damage. In essence, connecting a microwave to an outlet that supports lower amperage could damage it.

Amperage also helps housing planners on how to allocate power to different rooms in a house or common space. 

And that’s not all:

Learning how to calculate the cost of running your microwave helps you manage your budget.

If you are particular about how much you spend, your power expense is something you want to pay attention to.


Knowing how much power your microwave consumes can make you more informed about energy-efficiency decisions.

Obviously, if you plan to save money on your energy bill, buying an energy-efficient microwave is critical.



We want the best from our microwaves.

And the most effective way to determine the safety of your appliance is to understand its amperage. In doing so, you can avoid any problems that may arise from using appliances that draw more current.

Another important factor is calculating the cost of using your microwave to track electricity expenses.

To recap, this posts helps you to:

  • Understand the concept of amperage and voltage.
  • Calculate how many amps your microwave consumes by researching product details and dividing the wattage by the voltage.
  • Find out how much it costs to use your microwave by determining the average daily use and cost of electricity.

That said:

Please let us know if you were able to calculate how many amps your microwave uses and how you came about your solution. We welcome your feedback in the comments section below.

Frequently Asked Questions

Can A Microwave Be On a 15 Amp Breaker?

Yes, a microwave with 600-700 watts can be connected to a 15-amp breaker. However, any microwave over 1000 watts requires a 20-amp breaker for safe and optimal operation.

How Many Amps Does a 1500 Watt Microwave Use?

A microwave oven with 1500 watts and a voltage of 120 uses 12.5 amps. You can get this value by dividing the wattage by the voltage.

How Many Amps Does a 1000 Watt Microwave Use?

A microwave oven with 1000 watts and a voltage of 120 uses 9 amps. You can obtain this value when you divide the wattage by the voltage.

How Many Amps Does a 1200 Watt Microwave Draw?

A microwave oven with 1200 watts with a voltage of 120 draws 10 amps. Simply divide the wattage by the voltage to get the number of amps.

Can I Use Many Amps On a Circuit?

Yes, you can. However, if you load it beyond its capacity, the fuse may burnout and potentially cause a fire. Therefore, ensure your circuit can handle the number of amps you wish to load it with.

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