Replacing your internal doors is an investment and we want to help you order the correct sized doors, in the correct style, first time round.
Understanding door sizing is key to ensuring that your order is correct, and this guide serves to do just that.
Most houses have standard sized door openings and for the most part, you’ll find your door style of choice available. As standard sized doors are generally always in stock (you can use our handy stock checker to check this), you can have your doors delivered in 3-5 working days.
As not all door styles are available in every size, we would recommend measuring up and determining which door sizes you need first. You can then use our website filters to select the specific door height, width and thickness that you need, to see which products are available.
The doors in your home may be different sizes so we recommend measuring them all. Bathrooms, and sometimes kitchens, for example, are usually smaller.
Imperial & metric door sizing
Although all door dimensions are provided in metric and imperial units, doors are usually referred to as 'metric' or 'imperial'.
Imperial doors are generally found in England and Wales and are 1981mm in height and 35mm in depth. Metric doors were prevalent in the 80s and 90s and are generally found in Scotland (and Europe) and are 2040mm tall and 40mm in depth.
Here’s a breakdown of standard UK door sizes and what you need to know:
Standard UK door heights
Most houses in England and Wales have a standard internal door height of 1981mm, which is 6'6" or 78".
In Scotland, a standard internal door is usually 2040mm in height, which is 6' 8" or 80.25".
Standard UK door widths
The most common door width in the UK is 762mm (30”) - all the internal doors that we stock are available in this size. A 838mm (33”) door is also commonly available, and this width is suitable for disability access, known as Part ‘M’ compliant.
Here is a breakdown of the most commonly bought door widths and their uses:
- 457/533mm (18"/21") – commonly used for wardrobe or cupboard doors
- 610/686mm (24"/27") – commonly used for small or restricted spaces where a smaller door is required, such as kitchens and bathrooms
- 762mm (30") – the ‘standard’ internal door size in England and Wales
- 838 (33") – the door width required for wheelchair access i.e., disability access
- 526/626mm (21.5"/24.5") - wardrobe or cupboard doors
- 726/826mm (28.5"/32.5") - most rooms in a house
- 926mm (36.5") - larger openings e.g., wheelchair access
Standard UK door thickness
This is where things get a little simpler! Most UK internal doors are 35mm in thickness (imperial) particularly in England and Wales. In Scotland, where doors are a little taller, they are also usually metric size 40mm thick.
Standard UK fire door sizes
Fire doors come in two widths depending on which rating you need. FD30 (30 minute) fire doors are 44mm in thickness; FD60 (60 minute) are 54mm in thickness.
For private dwellings, it is recommended to install fire doors where the risk is higher e.g., kitchens, integral garages, and rooms with many electrical appliances. In 3-storey homes, and homes with loft conversions, any rooms that are connected to the escape route needs to have a fire-rated door and frame. If your property is a new build, it's likely that some of your doors are already fire-rated. Fire doors are legally required in HMOs (Houses of Multiple Occupation).
Standard UK door sizes
Based on the information above, the most common internal door size (in England and Wales) is 1981 x 762 x 35mm (30"), and 2040 x 726 x 44mm (28.5") in Scotland. All our doors have the various sizes available displayed using this format: height x width x thickness.
Even if your door openings are of a standard size, it’s very common for doors to require trimming to fit perfectly in the frame and/or clear the flooring. This is where the door lipping is relevant.
Lippings are the solid edges that make up the border of a door, protecting the core, which is likely to be made of particle board or compressed chipboard (unless is it a solid oak door). This lipping can be trimmed on each door edge to get the fit ‘just right’ and this is where the skills of a joiner, and their tools, come into play.
Lippings vary in size - usually 8mm to 20mm - the latter allowing a maximum of 15mm to be trimmed from each edge. Most doors usually require 5-8mm to be trimmed off each edge during installation. Lippings are usually made from hardwood or solid oak depending on the door design/construction. Engineered oak doors will often have oak edges/lippings so that it matches the face after trimming.
If you think your doors will require a considerable amount of trimming, it’s important to choose a door style that has a generous lipping - this information can be found in the features section for each door.
It’s important to note that if you exceed the recommended trimming you may compromise the integrity of your door and the guarantee. All doors will arrive with finishing and fitting instructions.
Non-standard door sizes (odd-sized doors)
If you require door sizes that aren’t standard, many doors are available in custom sizes (made to measure). Custom-sized doors are currently on a 22-week lead time from sign off due to global staffing and shipping, and this is the case for all door suppliers. You can split your order with us so that your doors arrive as soon as they are available: this is of no additional cost to you - you will only pay one shipping fee.
If you do require a door size that is smaller than conventional sizes, is of a different shape i.e., sloped to fit in a loft conversion, you can send us an enquiry on our custom sized doors page.
Standard UK Door Sizes conversion chart
The table below provides the door sizes available on our website (note, not all styles are available in all sizes) in metric and imperial units (mm, feet and inches, and inches respectively).
|Metric (mm)||Imperial (feet & inches)||Imperial (inches)|
|1981 x 305||6ft 6" x 1ft||78" x 12"|
|1981 x 457||6ft 6" x 1ft 6"||78" x 18"|
|1981 x 533||6ft 6" x 1ft 9"||78" x 21"|
|1981 x 610||6ft 6" x 2ft||78" x 24"|
|1981 x 686||6ft 6" x 2ft 3"||78" x 27"|
|1981 x 711||6ft 6" x 2ft 4"||78" x 28"|
|1981 x 762||6ft 6" x 2ft 6"||78" x 30"|
|2032 x 813||6ft 8" x 2ft 8"||80" x 32"|
|1981 x 838||6ft 6" x 2ft 9"||78" x 33"|
|1981 x 864||6ft 6" x 2ft 10"||78" x 34"|
|2040 x 526||6ft 8.3" x 1ft 8.7"||80.3" x 20.7"|
|2040 x 626||6ft 8.3" x 2ft 0.6"||80.3" x 24.6"|
|2040 x 726||6ft 8.3" x 2ft 4.6"||80.3" x 28.6"|
|2040 x 826||6ft 8.3" x 2ft 8.5"||80.3" x 32.5"|
|2040 x 926||6ft 8.3" x 3ft 0.5"||80.3" x 36.5"|
What if I order the wrong sized door/doors?
Let us know within 48 hours and, as long as the doors are untouched and still in their original packaging, we’ll collect and replace them. We just as you to cover the collection charge which is £45. No restocking fee?
What if the doors I need are various sizes and not all are in stock?
We can split the delivery at no charge - all doors in stock will be delivered in 3-5 working days. The balance will be delivered when they arrive into stock. You can check stock levels for each size on our product pages.
Can doors be trimmed/cut to size?
It's more than likely that a standard-sized door can be sufficiently trimmed during installation to fit, negating the need to have a custom-sized door manufactured. You can trim up to 15mm of the top, bottom and sides of most doors. Check the product description and/or lipping size information for each product.
Should I measure my existing door or the frame?
Measure your door to get the door size that you require.
How do I measure my doors?
It's best to measure height and width from 3 different places to get an idea of the min/max for each. To obtain your door height, measure the door top to bottom from the middle, left- and right-hand side of your door. Do the same for width: measure side to side from the top, middle and bottom of your door. The thickness should be uniform and only require one measurement.
Still need help?
If you're still a bit unsure about which doors to choose, we're always here to help. Just drop us a message via chat, or contact us, and we'd be happy to guide you.