Standard microwave sizes vary by type (countertop, over-the-range, built-in), but generally range from 15-25 inches wide for countertops (around 20-30L capacity) to 30 inches wide for built-in/over-the-range models, with depths often 16-20 inches (closed) and capacities from small (15L) to family-size (30L+), always remember to allow extra space for ventilation, notes Whirlpool, KitchenAid, and KitchenAid.
Microwave capacities vary from about 17L to over 32L (more for integrated models). If you are shopping for a family-size microwave, consider models with a capacity of 27L and above.
A guide to internal microwave capacity
Small microwaves usually offer 15-20 litres of capacity, while medium models range from 20-25 litres. Large microwaves provide 25-32 litres of space, and extra-large models offer 32+ litres, perfect for family cooking.
The only difference is that the 30 inch model has a wider door and filler plate on either side of the microwave to cover the extra 3 inches between the 30 inch cabinet cutout and the 24 inch microwave. The 30 inch model looks better when stacked with other 30 inch appliances.
On average, microwaves range in capacity from 0.7 cu. ft., which is suitable for most dinner plates, to 2.2 cu. ft., which is a better size for bigger cookware.
Built-in microwave dimensions
Capacity can range from 1.0 to 2.2 cubic feet, with most landing between 1.2 to 1.6 cubic feet. Widths align with standard cabinet widths, usually 24, 27 or 30 inches. Height typically ranges from 17 to 22 inches.
What Features to Look for When Buying a Microwave
Yes, a standard dinner plate generally fits in a 20L microwave because they are designed for typical dishware, usually with turntables around 24-27cm that accommodate plates, but you should always check the specific internal dimensions (width, depth, and height) for your plate and microwave model to be sure, as actual space varies.
For the best microwave in Australia, look towards Panasonic, LG, and Sharp, with Panasonic often leading in tests for quality and reliability, while LG's NeoChef and Sharp's Inverter models offer great features like even heating and sensor cooking; budget-friendly options like Kmart also perform well for basic needs, but consider inverter technology for more even cooking.
Microwaves generally last 7 to 10 years, but this varies greatly with usage; heavy use by large families might see them last only 4-5 years, while light use with good maintenance (keeping vents clear, cleaning spills) can push them to 10 years or more, with some high-end models lasting 15+ years. Factors like brand quality and repairability also play a big role in longevity.
There's no single "best," but Panasonic, Toshiba, and LG consistently rank high for overall performance, reliability, and features like inverter technology (even heating). Panasonic often leads in overall testing, while Toshiba excels in value and basic functions, and LG offers strong performance with features like inverter tech. Other strong contenders include Breville for feature-rich models and Sharp, known for power.
The large 20L cavity comfortably fits a standard 10" dinner plate, making it the perfect family size microwave for enjoying everyday meals or late-night snacks with loved ones. Effortlessly defrost frozen foods with speed and precision.
In general, the higher the wattage, the more cooking power you get for faster cooking, more powerful heating and often a wider range of settings and features to work with.
Capacity: Consider the microwave size based on your family's needs. A larger capacity of at least 25L microwave is suitable for bigger families, while a smaller 15-20L microwave will be sufficient for individuals or small families.
The ideal wattage for most microwave recipes is 1,000 watts for versatility in defrosting, reheating and cooking. Select models such as the 1,000-watt Whirlpool® over-the-range microwave have a Steam Cooking feature that's convenient for when you want to get tasty, tender veggies on the table in minutes.
In the realm of performance and efficiency, inverter microwaves take the lead, especially when you need to defrost food evenly without hot spots. These microwaves, known for their constant power output, ensure evenly cooked food every time. There's no more worrying about cold spots or overcooked edges.
Issues with the door switch, internal fuse, magnetron, diode, high-voltage capacitor, and electronic control board are common causes of microwave malfunctions, requiring repair or replacement by a technician.
Microwaves with higher wattage levels, typically those boasting 900 watts or more, can heat and cook food significantly faster than their lower-wattage counterparts. This can be a valuable time-saving feature for households with busy schedules.
IS A 700 WATT MICROWAVE GOOD? Microwaves with 700 watts have less power than their higher wattage counterparts, so they are slower depending on your meal. Most microwave recipes require 1,000 watts of power for best results, so you may want to choose a microwave model with a higher wattage when shopping.
The capacity of these microwaves ranges from 15-20 litres. Midsized microwaves: are a bit bigger and can prepare food for between 2-4 people and have an interior capacity of 21-25 litres. Full-sized microwaves: are usually over 26 litres and can cook for between 4 and 6 people.
Using the tape measure or laser level, measure horizontally across the widest exterior sides of the microwave. For over-the-range and built-in units, be sure to measure the width of the cutout — the area where you'll be doing the new installation.
To convert a Countertop Microwave for use in a built-in application, there must be an optional built-in trim kit available for use with the specific model. There are built-in trim kits for use in a 27" or 30" wide cabinet installation.
RISE™ 27" Built-In Microwave Oven with Speed-Cook | JennAir.