Fireplace Dimensions (Size & Measurement Guide) – Designing Idea (2022)

Welcome to our fireplace dimensions guide including measuring fireplace openings and surrounds and different kinds of fireplace sizes.
Fireplace Dimensions (Size & Measurement Guide) – Designing Idea (1)Fireplace in a home, especially when you’re living in colder weather, is a smart investment; they don’t just keep you warm but add to the value of your home.

Here, we present you with different dimensions for different kinds of fireplaces. Ready? Let’s get to it!

Table of Contents

Standard Fireplace Dimensions

There are two situations when considering the dimensions of your fireplace.

The first is measuring your fireplace’s inner construction, which includes the smoke shelf area that extends inside and above the fireplace, the flue that opens up to the chimney, and the firebox itself where the fire burns.

The second is the exterior of the fireplace itself, which the occupants of the house see. This includes the shelf, the mantel, the facing, the firebox, and the hearth.

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To make this article concise and not all over the place, we will only be considering the second situation involving the face of the fireplace.

Fireplace Dimensions (Size & Measurement Guide) – Designing Idea (2)

Standard Fireplace Width

To determine the width of the fireplace, we will measure the width of the firebox. In general, a firebox width can be at least 11 to 19 inches and over. Also, a height of 14 inches for the firebox.

Fireplace Depth

A fireplace’s depth is measured from the back of the firebox to the opening—the average depth of a fireplace is about 16 inches deep.

Standard Fireplace Opening Dimensions

A fireplace’s height opening is the measure of the hearth from the top of the opening, while the measure of the opening’s width is the measure of one side of the opening to the other.

The standard height of a fireplace’s opening is between 24 to 29 inches and 24 to 36 inches wide.

Fireplace Dimensions (Size & Measurement Guide) – Designing Idea (3)

Standard Fireplace Surround Dimensions

Surround is an unofficial name given to the collective parts of the mantle, the legs, and sometimes the hearth. The fireplace’s surround is the face surrounding the firebox of your fireplace. The measure of the fireplace’s outer cabinet is the coordinated measurements of these parts.

Most fireplaces are 42 inches wide, while some smaller fireplaces can have as little as a width of 36 inches. Some somewhat bigger fireplaces can even be 48 inches wide.

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With the height, generally, a mantle should at least be 12 inches above the opening. For a standard fireplace with a 36 inches width, it should be 29 inches tall.

Masonry Fireplace Dimensions

Fireplace Dimensions (Size & Measurement Guide) – Designing Idea (4)Masonry fireplaces are constructed with brick, stone, or mortar. Building a masonry fireplace usually involves planning because they are traditionally made with the house. You can generally see these types of fireplaces in colder places and older ancestral homes and ski resorts.

Masonry fireplaces generally have a dimension of 24 to 48 inches for a home with short walls, but it could reach 84 inches for homes with much taller walls.

The height of a masonry fireplace will depend solely on the size of the room where the fireplace will be located.

For smaller living rooms, a measurement from the hearth to the mantle of 4.5 feet or 54 inches is appropriate, while for a bigger house or setting, you could go as low as 54 inches or as high as 73 inches.

Gas Fireplace Dimensions

Fireplace Dimensions (Size & Measurement Guide) – Designing Idea (5)Gas fireplaces are the more modern alternative to log fireplaces. They are not only easier to keep burning and are safer, but they are also proven to be more effective at heating the house by 75 to 99 percent.

Gas fireplaces are usually the type of fireplaces found in bedrooms or even bathrooms, as they can be in any shape or dimension we prefer. There are different types and designs available for gas fireplaces, but ultimately, these are the standard dimensions for a common height room.

A width of 24 to 48 inches (usually a size between divisible by four, e.g., 28, 32, 36, etc.), a fireplace height 36 inches and above (a firebox height of 14 inches and an opening height of 24 inches.) Checkout our gas fireplace design guide here.

Electric Fireplace Dimensions

Fireplace Dimensions (Size & Measurement Guide) – Designing Idea (6)Electric fireplaces take the space of conventional wood fireplaces that are not working or are no longer in use.

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Electric fireplace models are technically electric heaters made to look like traditional fireplaces, and the best thing about this type is there is no need to install a chimney, a flue, or even a vent. They dramatically scale down the cost of installation versus the wood-fire fireplaces.

The dimensions differ with this type and are usually dependent on where you want to put them. You could go larger for an electric fireplace in the living room, but a fireplace with a more sizable width and a smaller height is generally better for your bedroom.

There are electric fireplaces perfect to be situated in right smack in the middle of a living room and usually have a dimension of 31 inches in height, a width of 44 inches, and a depth of 13 inches.

Fireplace Insert Dimensions

Fireplace Dimensions (Size & Measurement Guide) – Designing Idea (7)A fireplace insert is usually a sealed box taking the place of an old masonry fireplace. A fireplace insert can be powered by wood, gas, or propane, and they produce more heat and consume less fuel than a traditional fireplace. There are two types of fireplace inserts, and they could either be powered by gas or wood.

A gas and wood fireplace insert is available in three standard sizes of small, medium, and large. Small gas-powered fireplace inserts have a width, height, and depth of 26, 17, and 14 inches.

A medium insert has dimensions of 29, 20, and 14 inches, while a larger gas-powered fireplace insert has 32, 24, and 16 inches.

Corner Fireplace Dimensions

Fireplace Dimensions (Size & Measurement Guide) – Designing Idea (8)Corner fireplaces are a smart solution for smaller rooms because they will save wall space that can be allocated for additional furniture.

Electric or gas corner fireplaces even can be erected without needing a vent or a chimney, and some corner fireplaces can act as a TV stand for your television.

More oversized corner fireplaces for bigger homes can have dimensions as big as 41 inches in length and have a width of 54 inches. While some corner gas fireplaces have dimensions of 45.5 inches in width and a height of 40.5 inches.

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Double Sided Fireplace Dimensions

Fireplace Dimensions (Size & Measurement Guide) – Designing Idea (9)

Double-sided fireplaces are a pretty good idea if you want the fireplace’s ambiance and warmth to reverberate in two separate rooms.

These types are usually gas or electric fireplaces as they don’t need as much upkeep and can be enclosed in gas, unlike traditional wood-burning ones.

Double-sided fireplaces can also be called see-through fireplaces.A double-sided fireplace can come with a height of 52 inches, a width of 44 inches, and a depth of 25 inches. This type of fireplace usually has a deeper depth, as they extend from one room to the other.

Fireplace Mantel Dimensions

Fireplace Dimensions (Size & Measurement Guide) – Designing Idea (10)Fireplace mantels are the frame of your fireplace. They are usually the outer part that is decorated, especially for masonry fireplaces.

For a bigger fireplace with a width of 48 inches, a mantel width of 82 inches is acceptable. For a fireplace with a 42 inches height, a mantle length of 58 inches is appropriate.

There are no right and wrong since the fireplace mantle sizes differ from one to the other.Checkout fireplace wood mantel designs here.

Outdoor Fireplace Dimensions

Fireplace Dimensions (Size & Measurement Guide) – Designing Idea (11)An outdoor fireplace can make your backyard be utilized in all seasons, including winter. This type of fireplace usually comes in bigger sizes because they are out in the open and are more vulnerable to air and weather.

Outdoor fireplaces can come in widths of 36 to 180 inches, a height of 48 to 180 inches, and a depth of 36 to 72 inches.

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Now you have your ideal standard dimensions for each, but it is still essential to research or consult a fireplace expert if you plan to install one for your home. Good luck!

See more related content in our article about outdoor fireplace ideas here.

FAQs

What are the standard dimensions of a fireplace? ›

An average fireplace is about 36”x30”. When it comes to the actual dimensions of a fireplace, these can be found in just about any size larger than 24”x24”, all the way up to 48”x32” and higher. The physical size of a fireplace insert is often listed by the width in inches, and they tend to range from about 20” to 60”.

How do you measure the size of a fireplace? ›

Length: The distance from one side of the fireplace to the other. Measure the length at both the opening and back of the firebox. Height: The distance from the floor of the firebox to the top. Measure in the front and back to ensure an optimal fit.

How do you design a fireplace? ›

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What is a good size fireplace? ›

A fireplace should be 24 – 72 inches (2 – 6 feet) wide. Generally, smaller rooms require smaller fireplaces, while bigger rooms benefit more from larger ones. Getting the dimensions wrong poses the risks of a fireplace that overpowers or does not meet a room's heating demands.

How do you calculate the opening of a fireplace? ›

Step 1: Find the cross-sectional area of the fireplace opening. Multiply the W=36" X H=30" and that equals 1080 square inches of fireplace opening. Step 2: If you are using a round liner and the chimney height is more than 8' above the fireplace opening you can divide the 1080 by 12. This amount equals 90".

How thick is a fireplace? ›

How deep should a hearth be? InterNACHI recommends that for any size fireplace opening, the thickness of a hearth should be at least 4 inches (102mm).

What is the standard size opening for a fireplace? ›

The Average Dimensions for Each Part of a Fireplace

The average fireplace has the following dimensions: What is this? An opening that's between 24-36 inches wide, 24-29 inches high, and 16 inches deep. On average, the distance between the hearth and the damper is about 37 inches.

What size is a linear fireplace? ›

Linear Gas Fireplaces have a wide 4′ to 16′ viewing area and normally are not very tall 18″ to 36″. Although, some of our clients want a taller viewing area of up to 48″. There are five key decisions in designing your custom linear gas fireplace. 1.

How deep should a fireplace be? ›

A wood-burning fireplace should be at least 16 inches (40.64 cm) deep, as standard, unless the opening is over 48 inches (121.92 cm) wide, according to the Brick Industry Association. At most, the depth of a wood-burning fireplace should be 20 inches (50.9 cm) to allow for ample heat distribution.

What's in style for fireplaces? ›

The see-through glass fireplace (also called a four-sided glass fireplace) is another functional and sophisticated trend in 2022 fireplace designs. It falls in step with other popular fireplace styles, and its clean, linear designs will bring warmth and light to a contemporary space.

What is the current trend for fireplaces? ›

Trend #1: Linear Interior

2021 will see continue to see the strong growth in the number of large, linear, and contemporary gas fireplaces being installed in people's homes. This year will see these large, linear contemporary gas fireplaces placed in less modern styled living rooms and in a wider range of homes.

What is the height of fireplace hearth? ›

Hearth: The average height of a finished hearth at Acucraft is around 15'' to 18'' tall.

How wide should a fireplace surround be? ›

As a general rule of thumb, the mantel should at least be three inches wider on both sides of the fireplace. The average mantel width in most homes is six to twelve inches. With these dimensions, you can effectively deflect the heat coming from the firebox.

How much space should be in front of a fireplace? ›

1. All combustible materials must be 6"+ from the opening of the firebox. The National Fire Code requires all combustible material to be at least 6 inches from the opening of the firebox. For every 1/8 inch of protruding combustible material, you must account for an additional inch of clearance.

What is the standard size opening for a fireplace? ›

The Average Dimensions for Each Part of a Fireplace

The average fireplace has the following dimensions: What is this? An opening that's between 24-36 inches wide, 24-29 inches high, and 16 inches deep. On average, the distance between the hearth and the damper is about 37 inches.

What size is a linear fireplace? ›

Linear Gas Fireplaces have a wide 4′ to 16′ viewing area and normally are not very tall 18″ to 36″. Although, some of our clients want a taller viewing area of up to 48″. There are five key decisions in designing your custom linear gas fireplace. 1.

What is the normal width of a fireplace mantel? ›

The majority of mantels we sell are from 66”-78”, but we make every mantel custom to your unique space. Mantel Face Height: Is your fireplace in a large or small room? A mantel with a 6” Face Height can stand its ground in a large home, however, it can overpower a smaller space.

How wide should a fireplace surround be? ›

As a general rule of thumb, the mantel should at least be three inches wider on both sides of the fireplace. The average mantel width in most homes is six to twelve inches. With these dimensions, you can effectively deflect the heat coming from the firebox.

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