Highly Rated Internal Doors At Great Prices

Door Size Guide

Tips & Tricks To Measure Your Doors

Why is it important?

Getting door measurements wrong can be a costly mistake. Ordering doors that are too small or too big for your door openings could have a number of costly repercussions. We've tried to make the process a little easier with our measurement guide for internal doors.  


These days, there are so many different door sizes available, and it can become quite confusing to get the right measurements and units. Check out our size chart to see the different measurements in both metric and imperial sizes. Bear in mind that we do not stock doors in every size listed in this chart, but it could give you a good idea of what you need. You can then search our website to find out which doors we sell in that size!

Popular Standard Door Sizes


1981 x 457/533 x 35mm – Ideal for smaller spaces such as wardrobes and cupboards

1981 x 610/686 x 35mm – The perfect choice for narrow spaces

1981 x 762 x 35mm – The most popular size in the UK AKA a 2’6” door!

1981 x 838 x 35mm – The most common choice for wheelchair access AKA a 2’9” door.

 

Popular Metric Standard Door Sizes

Metric sizes being used more than ever, predominantly utilised in Europe and Scotland, they are gaining popularity.

2040 x 562 x 40mm

2040 x 626 x 40mm

2040 x 726 x 40mm

2040 x 826 x 40mm

2040 x 926 x 40mm


Fire Door Sizes

Many buildings regulations may insist on the installation of fire doors in some areas of the home. We know that most people want their doors to be consistent throughout the home, so it's really handy that so many door designs come in a fire-rated variation. Please remember that not all of the sizes listed below will be available as fire doors. Buildings regulations also require that all the door furniture, accessories and fixings are fire-rated to the same standard as the doors, so check out our fire door accessories section for the best products!

Size Chart

Our size chart shows the conversions of door sizes in different units, such at Metric (mm), Imperial (inches) & Imperial (feet & inches), so there's no need to work it out.

HEIGHT & WIDTH

Metric (mm)
Imperial (inches)
Imperial (feet & inches)
1981 x 457 78″ x 18″ 6′6″ x 1′6″
1981 x 533 78″ x 21″ 6′6″ x 1′9″
1981 x 610 78″ x 24″ 6′6″ x 2′0″
1981 x 686 78″ x 27″ 6′6″ x 2′3″
1981 x 711 78″ x 28″ 6′6″ x 2′4″
1981 x 762 78″ x 30″ 6′6″ x 2′6″
1981 x 838 78″ x 33″ 6′6″ x 2′9″
1981 x 915 78″ x 36″ 6′6″ x 3′0″
1981 x 1067 78″ x 42″ 6′6″ x 3′6″
1981 x 1168 78″ x 46″ 6′6″ x 3′10″
1981 x 1220 78″ x 48″ 6′6″ x 4′0″
1981 x 1372 78″ x 54″ 6′6″ x 4′6″
1981 x 1524 78″ x 60″ 6′6″ x 5′0″
2032 x 813 80″ x 32″ 6′8″ x 2′8″
2134 x 915 84″ x 36″ 7′0″ x 3′0″
2040 x 526 80 1⁄4″ x 20 11⁄16″ 6′8 1⁄4″ x 1′8 11⁄16″
2040 x 626 80 1⁄4″ x 24 5⁄8″ 6′8 1⁄4″ x 2′0 5⁄8″
2040 x 726 80 1⁄4″ x 28 5⁄8″ 6′8 1⁄4″ x 2′4 5⁄8″
2040 x 826 80 1⁄4″ x 32 1⁄2″ 6′8 1⁄4″ x 2′8 1⁄2″
2040 x 926 80 1⁄4″ x 36 7⁄16″ 6′8 1⁄4″ x 3′0 7⁄16″

 

 

How To Measure Your Doors

We offer the most popular internal door sizes, but sometimes your door opening requires a slightly more unique measurement. You can have many of our doors built to your exact specifications without bespoke door service, so give us a call to find out more! If you already have existing internal doors in place, you could take the measurements of that door to find out what size you need to order. We recommened that you make sure your doors fit perfectly if you are going to base your new door measurements on the existing doors. See below for how exactly you should measure your door. If you are not confident that the existing doors fit perfectly, perhaps a frame to frame measurement would be more reliable. 


Step 1 - Height

Take 3 measurements from top to bottom across the front of your door (labelled H1, H2 & H3 in the image below). Always remember to use the largest measurement that you take, because it is always better to have too much door than not enough!

Step 2 - Width

Repeat the first step for width and take 3 measurements from left to right across the front of your door (labelled W1, W2 & W3 in the image below).

Step 3 - Thickness

Take 3 measurements from the front to the back of the door to measure the thickness. These measurements should be taken from the top, middle and bottom of the door. It is essential that you include the frame rebate in your measurements. This will show where the door sits when it is closed. Your internal door thickness should match or come extremely close to either 35mm, 40mm or 45mm if it is a fire door. If your measurements are completely different to one of these three sizes, it's probably safe to measure them again!


No Doors? Measure The Door Opening Instead

If you are not replacing the frame in your door openings, the measure you need to take is a frame to frame measurement. To get the frame to frame measurement, you should place your tape measure on the inside of the door frame and measure sideways across to the other side of the frame. Repeat this process for the height and depth, remembering to take the measurement in three different places each time. If you don't have a frame in place, you will need to take a brick to brick measurement, which means you need to measure from one side of the wall to the other.

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