Over-the-range microwaves give you the convenience of quick reheating without sacrificing counter space. This 1.9-cubic-foot model from Whirlpool is available in multiple colors and finishes, including fingerprint-resistant stainless steel. Featuring 1,000 watts of power, it's also equipped with a 300 CFM ventilation system to keep odors and smoke from your cooktop under control. Customers particularly love the inclusion of the three-speed fan. Reviewers found installation to be fairly straightforward, but some noted that the instructions for all the settings aren't very clear.

The Toshiba microwave is covered by a one-year warranty, and the claims process is better than what most manufacturers offer. Typically they require you to ship the unit to and from a service center at your own cost, which likely costs as much as or more than the microwave itself. If anything should go wrong with the microwave under warranty, Toshiba will not repair the unit. Instead, they’ll issue you a refund check, which, according to the representative we spoke to, can take anywhere from four to eight weeks. Just know that you’ll need to provide your original receipt, the cut power cord from your unit, and the model number label in order to receive the refund. Contact Toshiba’s customer support center for more information.

Ever wondered how microwaves heat up food so quickly and efficiently? These appliances contain a part called a magnetron, which uses electricity to create high-powered radio waves. The waves are pushed into the microwave’s interior, where they bounce off the metal walls and penetrate whatever food you’re cooking. The turntable spins to help the waves hit the food from all angles, and this process makes the molecules in the food vibrate, warming them up. However, one of the downsides of microwave cooking is that radio waves can only travel a few centimeters into your food, so larger items don’t always cook evenly.

Direct microwave exposure is not generally possible, as microwaves emitted by the source in a microwave oven are confined in the oven by the material out of which the oven is constructed. Furthermore, ovens are equipped with redundant safety interlocks, which remove power from the magnetron if the door is opened. This safety mechanism is required by United States federal regulations.[60] Tests have shown confinement of the microwaves in commercially available ovens to be so nearly universal as to make routine testing unnecessary.[61] According to the United States Food and Drug Administration's Center for Devices and Radiological Health, a U.S. Federal Standard limits the amount of microwaves that can leak from an oven throughout its lifetime to 5 milliwatts of microwave radiation per square centimeter at approximately 5 cm (2 in) from the surface of the oven.[62] This is far below the exposure level currently considered to be harmful to human health.[63]
Many reviewers of this Panasonic microwave oven rave about its power, efficiency, and spacious interior. “We have been totally delighted with this microwave,” writes one. “We have had to scale back cooking times because of the incredible cooking power. The spacious interior and ease of use are just the best.” Another says, “Constant microwave power emission cooks to total satisfaction with no cold spots. Baked potatoes are the best I’ve ever had in my life, and I’m old, smooth, creamy, uniform texture throughout. No overdone skins. Sensor cooking works too. At this price, it’s a steal.” Part of what sets this microwave apart is the stylish stainless-steel front, with several reviewers noting that it “blends in well with a kitchen with stainless-steel appliances and black, as well.”
You’ve probably heard of a convection oven, but did you know that there are convection microwaves, too? These specialty appliances use the same technology as their oven counterparts: A fan blows and circulates hot air into the microwave, helping to cook food faster and more evenly. Convection microwaves can also brown or crisp food, similar to a traditional oven. 
From the late 1970s, Japanese companies such as Sharp Corporation manufactured low-cost microwave ovens that were affordable for residential use, leading to the rapid expansion of the microwave oven market in the 1980s. After Japanese dominance for much of the 1980s, with Sharp as market leader, South Korean manufacturers began entering the market in the late 1980s, with Samsung becoming a major microwave manufacturer.[18]

From the late 1970s, Japanese companies such as Sharp Corporation manufactured low-cost microwave ovens that were affordable for residential use, leading to the rapid expansion of the microwave oven market in the 1980s. After Japanese dominance for much of the 1980s, with Sharp as market leader, South Korean manufacturers began entering the market in the late 1980s, with Samsung becoming a major microwave manufacturer.[18]
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Consider both a microwave's dimensions and capacity as you shop. If you’re looking for an OTR or built-in model, it’s important to choose the proper size for the space, especially if you’re replacing an existing microwave. Also, make sure to check that the door has clearance to open. You have more leeway if you’re buying a countertop model, but it’s still important to measure that area in your kitchen.

There are, however, a few cases where people have been exposed to direct microwave radiation, either from appliance malfunction or deliberate action.[67][68] The general effect of this exposure will be physical burns to the body, as human tissue, particularly the outer fat and muscle layers, has similar composition to some foods that are typically cooked in microwave ovens and so experiences similar dielectric heating effects when exposed to microwave electromagnetic radiation.
This GE microwave oven with a 16-inch turntable proves you don't need to spend a bundle to get perfectly "baked" potatoes, steamed broccoli, or evenly heated mac 'n cheese. Thanks to a smooth control panel with lettering that contrasts well with the background, it's super easy to read the display and wipe it clean. If stainless steel isn't your style, this model also comes in black and white. 
^ Egert, Markus; Schnell, Sylvia; Lueders, Tillmann; Kaiser, Dominik; Cardinale, Massimiliano (19 July 2017). "Microbiome analysis and confocal microscopy of used kitchen sponges reveal massive colonization by Acinetobacter, Moraxella and Chryseobacterium species". Nature. 7 (1): 5791. Bibcode:2017NatSR...7.5791C. doi:10.1038/s41598-017-06055-9. PMC 5517580. PMID 28725026.

The plasticizers which received the most attention are bisphenol A (BPA) and phthalates,[69] although it is unclear whether other plastic components present a toxicity risk. Other issues include melting and flammability. An alleged issue of release of dioxins into food has been dismissed[69] as an intentional red herring distraction from actual safety issues.

Microwave ovens don’t actually deliver heat to a food item the way a conventional oven does (via heated air); they work by using microwave energy to cause the water and other simple molecules in food to rapidly vibrate, which generates internal friction at the molecular level, heating the food from within. That’s why microwave ovens can heat things so quickly, and why they’re so good at steaming vegetables in their own juices—they don’t rely on the slow and uneven process of transferring heat energy from the air, the way a conventional oven does. But the microwaves aren’t delivered evenly, the way heated air in a conventional oven is. That’s why microwave trays rotate: so that, ideally, every section of the food item gets equal treatment. But the world doesn’t operate on ideals, and neither do microwave ovens. Almost inevitably, you’ll get hotter spots near the center of the oven, which may or may not matter depending on the size of the thing you’re microwaving.
Consumer ovens work around a nominal 2.45 gigahertz (GHz) — a wavelength of 12.2 centimetres (4.80 in) in the 2.4 GHz to 2.5 GHz ISM band— while large industrial/commercial ovens often use 915 megahertz (MHz) — 32.8 centimetres (12.9 in).[26] Water, fat, and other substances in the food absorb energy from the microwaves in a process called dielectric heating. Many molecules (such as those of water) are electric dipoles, meaning that they have a partial positive charge at one end and a partial negative charge at the other, and therefore rotate as they try to align themselves with the alternating electric field of the microwaves. Rotating molecules hit other molecules and put them into motion, thus dispersing energy. This energy, dispersed as molecular rotations, vibrations and/or translations in solids and liquids raises the temperature of the food, in a process similar to heat transfer by contact with a hotter body.[27] It is a common misconception that microwave ovens heat food by operating at a special resonance of water molecules in the food. As noted microwave ovens can operate at many frequencies.[28][29]
The AmazonBasics Microwave brings Alexa voice control to the kitchen, so you can call up cooking times, power levels, and even popcorn reorders via Amazon Dash Replenishment. We’re skeptical about the usefulness of features that you can otherwise do with one finger, and the 700-watt model’s 0.7-cubic-foot capacity won’t heat foods as fast as our top pick and may be too small for some people.

Of course, once you buy your favorite microwave model, you need to start thinking about what to put inside it! Fortunately, we can help there, too. We’ve also got answers if you’re wondering if styrofoam is microwave safe – or are trying to find the best microwave popcorn for movie night (even low-calorie options). You can also keep up with latest microwave inventions out there, like Samsung’s healthy frying microwave!
The included turntable is easy to remove for cleaning, and the large programming screen allows you to specify power levels, cooking times, and menu options for shortcuts and more complex cooking tasks. If you aren’t a fan of all those automatic options, then there are an amazing 14 auto-cook options for menu buttons that can cook a specific kind of food. Even the start button stands out and is easy to use.
The Toshiba EM131A5C-BS handles all your basic tasks and balances counter space with a roomy capacity. Available in either black or silver stainless steel, this countertop microwave has an interior capacity of 1.2 cubic feet while measuring just over 20 inches wide and 17 inches long. Its 1,100 watts of power can be adjusted with 10 power settings, and customers agree that it cooks food evenly and quickly. The unit also is equipped with sensor cooking and two defrost settings, though some people found that not all of the pre-set cook modes worked as expected and the microwave defrosted too aggressively for some meats. Still, this Toshiba countertop microwave has a solid reputation for being easy to use and reliable.
Some current plastic containers and food wraps are specifically designed to resist radiation from microwaves. Products may use the term "microwave safe", may carry a microwave symbol (three lines of waves, one above the other) or simply provide instructions for proper microwave use. Any of these is an indication that a product is suitable for microwaving when used in accordance with the directions provided.[71]
This affordable microwave receives high praises for its compact size. “It works excellently, had a small footprint so it fits perfect on our countertop,” one reviewer writes. “It’s fairly small but very well constructed. Especially if you don’t have tons of space in the kitchen.” While some purchase the appliance for college dorms or small apartments, one reviewer shares it’s a great size for the office: “We needed a microwave that fit in a fairly small space. This one fit the bill. It is used on a regular basis here at work, and we have had no problems with it to date.” While it lacks the bells and whistles of other, more expensive models, such as sensor technology and “softening butter” presets, “if you are looking for a simple microwave, this is it,” writes one commenter.
Any object containing pointed metal can create an electric arc (sparks) when microwaved. This includes cutlery, crumpled aluminium foil (though some foil used in microwaves is safe, see below), twist-ties containing metal wire, the metal wire carry-handles in paper Chinese take-out food containers, or almost any metal formed into a poorly conductive foil or thin wire, or into a pointed shape.[57] Forks are a good example: the tines of the fork respond to the electric field by producing high concentrations of electric charge at the tips. This has the effect of exceeding the dielectric breakdown of air, about 3 megavolts per meter (3×106 V/m). The air forms a conductive plasma, which is visible as a spark. The plasma and the tines may then form a conductive loop, which may be a more effective antenna, resulting in a longer lived spark. When dielectric breakdown occurs in air, some ozone and nitrogen oxides are formed, both of which are unhealthy in large quantities.
A microwave oven heats food by passing microwave radiation through it. Microwaves are a form of non-ionizing electromagnetic radiation with a frequency in the so-called Microwave Region (300 MHz to 300 GHz). Microwave ovens use frequencies in one of the ISM (industrial, scientific, medical) bands, which are otherwise used for communication amongst devices that don't need a license to operate, so they do not interfere with other vital radio services.