Measuring for a new bed isn’t rocket science, but there are a few things to know before purchasing.
The most critical thing is there is a difference between a mattress’s size and a bed frame’s dimensions. Many people make the mistake of measuring for a mattress rather than a bed, which can create problems during installation.
Additionally, many people need to pay more attention to the space a bed frame takes up, especially when upsizing to a small double or double from a single bed.
This guide on measuring for a new bed covers everything you need to measure up and buy a new bed frame confidently.
Let’s jump in!
Bed frames are generally 1-2” (2.5-5cm) longer and wider than mattresses, pushing out from the wall 1-2” more. You can use this as a baseline to measure for a new bed using the standard UK mattress sizes below:
Use a tape measure to take measurements in your bedroom, and use the edge of a book or a stick to mark the edges on the floor.
While generic dimensions help find a baseline, you must also measure for any bed frame you like before buying. This will confirm whether your baseline measurement is on the money or if you need to find a smaller bed.
To measure up for a bed frame you like:
It is as simple as that.
Easy access depends on whether the bed frame comes pre-assembled (and to what extent) and how narrow and awkward your home is.
For example, divan bases typically come in one or two parts, making it impossible to get them up narrow, winding staircases. A flat-pack wooden or metal bed frame is more convenient in this instance.
To measure access:
With these details, you can determine if access is an issue.
Suppose your staircase clearance isn’t sufficient to manoeuvre a pre-assembled ottoman bed inside. In that case, you might consider a zip and link bed or a metal bed in several narrow boxes.

If it turns out that your bedroom is not big enough to accommodate the bed you want, there are several ways to increase usable floor space.
Here are some top tips:
Hopefully, these tips give you a few ideas. The most important thing is to measure for the bed frame - not the mattress - so everything fits.
If you found this article helpful, read our guide to bed sizes and UK mattress size guide.