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The idea of reheating food has leveled up with a very versatile kitchen appliance that offers a whole range of uses.  Invented in 1945 by a self-taught engineer has now become a known and used equipment over the world, as one of the most popular items to have on hand. 

Today, microwave sizes differ based on the brand. The type of microwave is what affects the size and capacity of the microwave oven.

Based on microwave sizes and how many persons it can serve, it is good to know the volume in litres. Hence, consumers want to know about microwave sizes in litres.

The larger the size and wattage of the microwave oven, the better chance the appliance will perform its function well enough for you to enjoy its benefits.

So before you decide to purchase it, you should take a closer look at how its capacity might vary depending on the size.


To understand microwave sizes in Litres, let’s first understand the different types of microwave ovens, dimensions, and capacity.

It is the size of your microwave that determines how many people can use it, single, family, or couples. Some sizes are only good for the small kitchen while other sizes can be fixed on kitchen walls.

To keep things simple, we have a countertop microwave oven, an over-the-range microwave oven, and a Built-in-microwave oven.

Countertop microwave oven normally sits on kitchen countertops, depending on the brand and model, it has external dimension and internal dimension. The external dimension is measured in inches while the internal dimension is measured in cu. ft. or in inches.

Most standard countertop microwave ovens’ external dimension ranges from 15 inches to 24 inches while the internal dimension ranges from 0.5 cu. ft. to 2.2 cu. ft.

Over the range, the microwave starts from 0.8 cu. ft. to 2.1 cu. ft. for internal capacity dimension and external dimension begins from 15.3 inches.

While the Built-in-microwave oven’s external dimension starts from 22 inches depending on the brand and the internal capacity dimension starts from 1. 0 cu. ft. to 2.0 cu. ft.



microwave sizes in litres

Below are examples of various microwave sizes in litres. These sizes and litres are based on different microwave oven models, types, brands, and functions. So, they have different dimensions and capacities:

Countertop Microwave ; 17.9 x 10.4 x 14 or 17.5 x 14.7 x 11 inches (700 – 800 watts)20L
Countertop Convection Microwave; 51.3 x 42.7 x 30.5cm (900 watts)27L
Built-in-Microwave; 564mm x 580mm x 380mm (W X D X H)28L
Countertop Convection Microwave; 52 X 51 X 33.5cm or 53.5 x 44.9 x 28.2cm (900watts)30L
Countertop Convection Microwave Oven32L
Built-in-Convection Microwave Oven34L
Countertop convection microwave oven; used for baking, grilling, reheating, defrosting, and cooking.35L  
Countertop Microwave oven; Height 24cm and width 37.5cm – 1500 watts for large quantities of food.40L
Countertop Microwave; 23 x 21 x 14 inches – 1000 watts42L
Built-in-microwave; 594 x 548 x 594mm (W x D x H)80L

Finally, 15 – 20 Litres is recommended for 2 – 3 people, 25 – 30 Litres for 3 – 5 people, and 30 + (plus) Litres for more than 5 people.


As I said above, microwave oven size depends on a number of factors like model, functions, and design. To draw up a microwave oven size chart, we will focus on the types of microwaves and their common sizes.

They are; small countertop microwave ovens, countertop standard microwave ovens, over-the-range microwave ovens, and Built-in-microwave ovens.

MICROWAVE TYPEWIDTH (inches)DEPTH (inches)HEIGHT (inches)CAPACITY (cu. ft.)
Small countertop microwave oven15 – 18 inches12 – 16 inches10 – 11 inches0.5 – 0.9 cu. ft.
Standard Countertop Microwave Oven21 – 25 inches16 – 20 inches12 – 15 inches1.0 – 2.2 cu. ft.
Over-the-Range Microwave oven30, 24 inches15 – 18 inches17, 10 inches0.8 – 2.1 cu. ft.
Built-in-microwave oven24, 27, 30 inches20 – 25 inches17 – 22 inches1.0 – 2.2 cu. ft.


Prior to learning about 20-litre microwave dimensions, it’s critical to understand that these appliances are intended for singles, couples, or small families.

20 Litres microwave oven with dimensions

Despite the fact that they are made for small glass rotating plates, they still function properly.

The sizes of 20-litre microwaves vary depending on the brand. Examples of various 20 Litre microwave and size dimensions are below:

20Litre Smart microwave oven, 800 watts with inverter, dimension; Height; 271mm and width; 457mm.

700 Watts 20Litres Desktop Electric Grill Microwave Oven with dimensions; 17.5 inches (W) * 14.7 (D) inches * 11 (H) inches.

TUNDRA MW Series – 120 Volt Truck Microwave Oven – 0.7 ft³ / 20 L / 700 Watts with dimension; (L x H x W): 17.9 x 10.4 x 14.0 inches.

ZOKOP Conventional Microwave Oven 700 watts, 0.7cu.ft. 20Litres with dimension: 17.76 x 10.16 x 13.07)” / (45.1 x 25.8 x 33.2) cm (L x W x H).

FROSAB Conventional countertop Microwave Oven 20Litres /0.7cu. ft., 700 watts with dimension; (17.76 x 10.16 x 13.07)” / (45.1 x 25.8 x 33.2) cm (L x W x H).


30 Litres Microwave Oven

There are numerous brands, sizes, and capacities of microwaves. These companies always provide the features that customers want.

The size of your family should be at the top of your list of things to think about because it will determine the best microwave in terms of litres.

For the record, a microwave with a capacity of 30 liters is ideal for single people, couples, and small families.

30 liter is equal to 1.0 cubic feet. The Toshiba 7 in one countertop microwave oven with Air fryer inverter technology is 30 litres in capacity with an external dimension of 20.6” W x 16.3” D x 11.8” H with a 12.4” turntable.

The material is stainless steel and the wattage is 1000 watts. You do not have to worry about space as its installation type is a countertop.


25 Litres Microwave oven

An example of the 25 Litres microwave oven is the Breville compact countertop microwave oven. It is carefully designed for reheating, defrosting, and cooking.

This 25 Litres countertop microwave oven is very quiet and closes softly. It has a one-touch menu button that enables you to access your favorite food settings like popcorn, beverage, reheating pizza, defrosting vegetables, cooking potatoes, or creating quick and easy snacks.

In addition, this 25 Litres countertop microwave oven comes with a child lock protection that prevents injury for kids.

One outstanding quality of the Breville 900 watts 25 Litres microwave oven is that the reheat function uses lower power levels to gently reheat food without drying or overcooking, unlike other microwave oven brands.

Finally, it comes with a one-year warranty.


There is no one particular size in inches when it comes to microwave ovens because we have various types, brands, watts, capacity in cubic feet, and design models.

For example, a compact countertop microwave oven might have a width size from 15 – 19 inches, depth from 13 – 15 inches, and height of 10 – 11 inches.

24 inches microwave oven size

A standard countertop microwave oven might begin with a width size of 20 – 21 inches, a depth of 16 – 19 inches, and a height having 12 inches.

Over-the-range, microwaves begin with a width size of 23 – 29 inches, depth of 16 – 17 inches, and height of 16 – 17 inches.

Built-in-microwave begins from a width size of 23 inches, depth of 24 inches, and height of 15 inches. A good example of a Built-in-microwave with 24 inches size is the COSMO Built-in Microwave with Defrosting Rack and 1.2 cu. ft.


Microwave ovens can be measured in either inches or cm (centimeters).

As I said above, a microwave has an internal dimension and an external dimension. For example, when you see a dorm room microwave oven with dimensions of (W x D x H): 17.3” x 13.0” x 10.2 in inches.

You can easily convert the inches of the microwave dimension to cm. So, 1inch equals 2.54cm. Therefore, 17.3 inches multiplied by 2.54 will give you the value in cm which is equal to 43.94cm.

Finally, if you have a Black + Decker countertop 700 watts microwave with a dimension of 17.3 x 13.0 x 10. 2 inches, the dimension in cm will be 43.94cm x 33.02cm x 25.91cm.


The same principle applied in converting microwave dimensions in inches is the same one you apply when converting to mm (millimeters).

Some countries like using mm as measurement compared to inches while some countries prefer inches to mm.

For example, if a Samsung speed cooking countertop microwave oven has a dimension of 21.8 x 18. 6 x 12.3 inches, the value in mm is gotten by multiplying it by 25.4 which gives the 553m x 472mm x 312mm.


Ovens vary in type, ranging from gas ovens, convection ovens, and electric ovens. The size of their interior is measured in litres.

The bigger the feast the more liters you’ll need. The average capacity of a single oven is around 60litres. 

However, this doesn’t mean that every oven needs to be at 60 litres, there can be other sizes. 

Some of them can be larger, some smaller, and some medium.  They’re not just any oven; they’re special. They have a few features to distinguish them from regular ovens.

30 Litres capacity Cosori oven

For example, the Cosori air fryer toaster oven is a convection oven made out of stainless steel. It has a large capacity for up to 7 persons and 30 litres in dimension.  It is versatile, very easy to use, and clean.

It has a rapid heat circulation up to 360 degrees and temperature settings with easy controls.

Nutrichef 28 Litres Capacity oven

Another versatile oven is the Nutrichef portable outdoor gas oven. This oven type has a ceramic burner with a total capacity of 28 litres for maximum convenience. It is also portable and lightweight.

There are many ovens designed by different manufacturers with varying sizes and capacities designed to suit your taste and preference.