Standard Door Sizes

There are many different standard door sizes available in the UK and understanding the measurements can often become quite confusing.  JB Kind Doors offer a core selection of the most common door sizes from stock and if you have a non-standard size requirement, bespoke internal doors can be ordered for many of our doors.

UK standard door sizes

• 1981 x 457/533 x 35mm – door sizes tend to be most popular for use as cupboard or wardrobe doors.
• 1981 x 610/686 x 35mm – door sizes are used where the wall space may be restricted and a smaller door is required.
• 1981 x 762 x 35mm – often referred to as a 2’6” door is the most common internal door size in England and Wales.
• 1981 x 838 x 35mm – in most circumstances provides the required opening width for wheelchair access under the Part ‘M’ mobility requirements.  You may also hear this door size being referred to as a 2’9”.

View our internal doors

Metric standard door sizes

Metric-sized internal doors are becoming increasingly popular and are most commonly used in Scotland and Europe.  The main difference is an increased door height of 2040mm and door thickness of 40mm.

• 2040 x 526/626/726/826/926 x 40mm

Fire door standard sizes

All of the standard UK and metric door sizes are usually available as a fire door equivalent with the only difference being an increased door thickness of 45mm.  This is because extra core component materials are required in the construction of the door to achieve its’ fire rating.  Remember to check that your frames, intumescent seals and ironmongery also comply with the door’s fire certification.  See our Fire Door Fitting page for more information.

Find out more about our fire doors

Door size conversion chart

Please see below our helpful door size conversion chart.  If you still work in feet and inches, the chart will help you work out the metric equivalent size of our doors.

Door Size Question & Answers

What’s the average height of a UK internal door?

Within England and Wales, the most common door height is 1981mm (6’6”)
Scotland most commonly use a metric equivalent that is slightly taller at 2040mm

What’s the average width of a UK internal door?

The average width of an internal door within England and Wales us 762mm (2’6”)
Scotland usually opt for a metric equivalent that is slightly smaller at 726mm

How do I measure for a replacement internal door?

Measure inside the door frame, across the width (top, middle and bottom) and take the widest measurement to determine the required door width.

The same applies for the door height. Measure inside the vertical side of the frame and the longest length determines the height required.

For more details, see How to measure for a new door

How wide is a standard UK internal door frame?

The most common door frame width is 762mm in England /Wales and 726mm in Scotland to accommodate the most popular door sizes of the same size.

Door frames can be supplied pre-assembled or in component parts which can be cut to size, to fit all door sizes.

We would always advise using professional joinery services, as fitting a door frame is precise work and is trickier than it looks.

How do I measure for a double door?

Start by measuring the opening size and divide the width by two to give an approximate width for each door.  If the frame is not already fitted, you need to allow for this (most common frame width is 30mm both sides), as well as some tolerance for fitting (approximately 2-3mm each side).

Opening width – Frame width (e.g. 60mm) – Fitting adjustment (6mm) = Double door width ÷ 2 = Single door width

Compare the Single door width with the sizes available in your chosen design to determine whether a standard option will work or if you require bespoke made to measure doors.

When fitting double doors, you also need to consider how you would like the doors to meet in the middle. E.g. square or rebated meeting stiles. See How to Create a Door Pair for more information.

Fitting double doors is not straight forward and we would always advise using a professional Joiner to help you achieve the perfect fit.

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