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How Many Amps Does a 1000 Watt Microwave Draw?

Written by Edwin Jones / Fact checked by Andrew Wright

How Many Amps Doest a 1000 Watt Microwave Draw

Microwaves have revolutionized how we cook, making meal preparation faster and more convenient. However, it is also one of the appliances in our home that has a higher electrical demand.

If you wonder how many amps does a 1000 watt microwave draw, there are essential aspects to grasp. First, familiarize yourself with the correct calculation method, and second, understand the factors that can influence its amp draw. Let’s go through these points in more detail below.

Amps Draw of 1000-Watt Microwave


Typically, an average microwave with a power rating of up to 1,200 watts may use a current draw of 10 amps at a 120v circuit. However, in countries where the standard household outlet voltage is 240 volts, which may result in a lower amp draw.

Therefore, instead of up to 10 amps, it may only draw 5amps for a 240v circuit. Awareness of these voltage variations is crucial for understanding the varying amp draw of microwaves and ensuring proper electrical compatibility in different regions.

1. Calculating Amperage

To determine the microwave amp draw efficiently, you need to consider its power rating, typically measured in watts, and its voltage rating. Using the formula below, you can easily calculate the estimated current draw of a microwave.

Amps = \frac{Watts}{Voltage}

For instance, consider a 1,000-watt microwave with a voltage rating of 120V. By applying the formula, the calculation would be as follows: 1,000 watts divided by 120V, resulting in an estimated current draw of 8.33 amps.

\text{Amps} = \frac{1000 \, \text{watts}}{120 \, \text{volts}} = 8.33 \, \text{amps}

However, the calculation changes if the same 1,000 watts microwave operates on a 240-volt circuit. In this scenario, the formula would be Amps = 1,000 watts / 240 volts. As a result, the estimated current draw would be approximately 4.17 amps.

Amps = \frac{1000 \, \text{watts}}{240 \, \text{volts}} = 4.17 \, \text{amps}

2. Factors Influencing Amperage of Microwaves

Aside from understanding how to calculate the estimated microwave amperage, it is crucial to be aware of certain factors that can influence its current draw rating. These factors play a significant role in determining the amperage usage of your microwave and can impact its overall efficiency and energy consumption.

In this case, let’s explore these factors below.

1. Oven Size


The size of the microwave oven plays a significant role in determining its amperage. Larger microwave ovens typically have higher wattage capacities and higher electrical requirements, making them suitable for more substantial cooking tasks.

As a result, they draw more current to meet the heating needs for cooking food quickly. On the other hand, smaller microwaves may have lower amps required as it comes at lower wattages.

2. Food Being Cook


The type and quantity of food being cooked directly influences the microwave’s amperage. Cooking dense and large food portions may require setting the microwave at a high-power level, causing it to work harder and draw higher amperage.

In contrast, reheating a small plate of leftovers would demand less power and result in lower amperage usage.

3. Use Time


Lastly, the cooking or heating time duration significantly impacts the microwave’s amp usage. Normally, longer cooking sessions require sustained power, increasing amperage usage.

Frequently Ask Questions

Is a Higher Microwave Power Rating Much Better?

While it is true that microwaves with high power ratings are beneficial for faster cooking, it does not mean that it is always good. In some cases, where you need precise cooking, low power ratings may be beneficial too.

How Much Electricity Is Used by a 1,000 Watts Microwave?

A 1,000-watt microwave typically consumes 1 kilowatt-hour (kWh) of electricity for every hour of use at its maximum power setting. However, the actual electricity usage can vary based on cooking times, power levels, and frequency of use.

Can I Save When Cooking in a Microwave?

Yes, cooking in a microwave can be beneficial, especially when heating and a quick way of cooking. Just be mindful of your microwave’s power rating, electricity usage, and efficient cooking practices to maximize it while minimizing energy consumption.


In conclusion, knowing how many amps does a 1000 watt microwave draw is crucial for ensuring your electrical circuit can meet its power demands effectively. This knowledge allows you to use the microwave safely and optimize its performance.

Moreover, always consider the various factors that can influence its amp drawing. You can confidently enjoy your microwave’s convenience and benefits without sacrificing its high-power consumption by staying mindful of its amp draw and other influencing factors.

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