How to Measure a Room for a Bed: Step-by-Step UK Guide
To measure a room for a bed, use a tape measure to record the length and width in centimetres, subtract at least 90cm clearance on each side for access and doors, then match the remaining space to standard UK mattress sizes such as a 135x190cm double or 150x200cm king. This straightforward process helps first-time buyers avoid buying a bed that will not fit or will leave the room cramped.
Why Accurate Room Measurement Matters
Getting the measurements right prevents the common mistake of ordering a mattress that blocks wardrobe doors or leaves no space to walk around the bed. In UK homes, especially terraced houses with smaller bedrooms, every centimetre counts. Leave at least 60-75cm of clear walkway on the main access side and 30-45cm on secondary sides. This ensures you can change bedding comfortably and open drawers or doors without obstruction.
Tools You Need and Preparation Steps
Before measuring, clear the room or move existing furniture. You will need:
- A retractable tape measure accurate to 1cm
- Notepad and pen or phone notes app
- Helper to hold the tape for longer walls
- Step ladder if measuring awkward alcoves
Measure twice and note the smallest reading for each wall to account for any protrusions such as radiators or skirting boards.
Step-by-Step Guide to Measuring Your Bedroom
- Measure the full length and width of the room at floor level.
- Record the position of doors, windows, radiators, fitted wardrobes and power sockets.
- Decide on bed orientation – usually centred or against the longest wall.
- Subtract clearance: minimum 90cm total around the bed for movement, more if you plan bedside tables or bedside tables.
- Calculate the maximum mattress footprint that fits within the remaining space.
For example, in a 3m x 3.5m room, after allowing 90cm clearance on three sides you may only have space for a 135x190cm double rather than a king.
Understanding Standard UK Mattress and Bed Sizes
UK beds follow these fixed sizes (width x length):
| Size | Dimensions | Typical Room Width Needed |
|---|---|---|
| Small Single | 75x190cm (2ft6) | At least 165cm |
| Single | 90x190cm (3ft) | At least 180cm |
| Small Double | 120x190cm (4ft) | At least 210cm |
| Double | 135x190cm (4ft6) | At least 225cm |
| King | 150x200cm (5ft) | At least 240cm |
| Super King | 180x200cm (6ft) | At least 270cm |
Always add at least 10cm to these figures for the bed frame. EU sizes such as 140x200cm differ and will not match most UK bed frames or sheets. Check the exact product page for frame dimensions before ordering from ranges such as king size beds.
Calculating the Largest Feasible Mattress Size
Decision rule: measure the clear floor space after subtracting walkways, then choose the largest standard size that leaves at least 10cm margin on each side for the frame. If your room is 280cm wide, a 150x200cm king leaves 130cm total clearance – enough for one 75cm walkway and one 55cm side. For families needing maximum storage, consider storage beds that fit the same footprint but add under-bed volume. In smaller rooms, a 135x190cm double often proves the practical maximum.
Placing Additional Bedroom Furniture
After placing the bed, allow 60cm clearance in front of wardrobes for doors to open fully. A chest of drawers needs 45cm in front for drawer extension. Position chest of drawers against a short wall to keep the circulation space clear. For children’s rooms, kids’ beds must follow BS EN 747 safety rules; top-bunk guard rails require the mattress depth stated by the maker so the rail rises at least 16cm above the mattress surface. Bunk beds are not recommended for children under 6.
Choosing the Right Mattress for Your Measured Space
Once the size is decided, select a mattress type that suits the room’s use. Memory foam options from memory foam mattresses work well in smaller rooms because they eliminate partner disturbance. For families, consider the Maxitex Diamond Dual Season 1000 Pocket Memory Mattress in the size that fits your measured space. Hypoallergenic and waterproof choices such as the Noomi Waterproof Eco Foam Mattress are ideal for children’s rooms or guest bedrooms where spills are likely. All mattresses sold in the UK must meet BS 7177 fire safety standards.
Common Mistakes and Final Checklist
Avoid measuring only the centre of the room or forgetting to account for skirting boards and door swings. Final checklist:
- Measure at floor level on all walls
- Mark door and window arcs on your plan
- Decide bed position before choosing size
- Allow minimum 90cm total clearance around the bed
- Confirm the chosen size appears on the product page with exact frame dimensions
- Consider future needs – a growing child may need a larger single or small double
With these steps you can confidently select from the wide range of mattresses and beds that will fit your room perfectly.
Our picks for this guide
- Maxitex Diamond Dual Season 1000 Pocket Memory Mattress – Offers dual-season comfort in the exact UK king or double size that fits most measured master bedrooms after allowing proper clearance.
- Noomi Waterproof Eco Foam Mattress Single – Practical waterproof single mattress that matches the 90x190cm size commonly used in smaller UK children’s rooms measured for safety clearance.
- Maxitex Kids Premier Sprung Mattress – Sprung support designed for the 90x190cm or 120x190cm sizes that first-time buyers calculate when measuring rooms for growing children.
- Noomi Clip On Storage Unit – Adds practical storage without taking floor space, ideal once you have measured the room and confirmed tight clearances around the bed.
Frequently asked questions
How much clearance do I need around a bed in a UK bedroom?
Leave at least 90cm of clear space on the main access side and 45-60cm on other sides. This allows you to walk around comfortably, make the bed and open any nearby wardrobe or chest doors. In very small rooms you may reduce one side to 30cm but never block emergency access.
Can I fit a king size bed in a small UK bedroom?
It depends on exact measurements. A 150x200cm king plus frame usually needs a minimum room width of 240cm after subtracting clearances. Measure your room carefully; many 3m x 3m UK bedrooms can only accommodate a 135x190cm double. Always check the specific bed frame dimensions on the product page.
Should I measure the room before or after buying new furniture?
Always measure the empty or existing room first and create a simple floor plan. Mark where the bed, wardrobes, chests and bedside tables will sit. This prevents ordering a mattress that leaves no space for essential bedroom furniture such as a chest of drawers or dressing table.
What is the difference between UK and EU bed sizes?
UK double beds are 135x190cm while EU doubles are commonly 140x200cm. UK kings are 150x200cm. Using an EU size in a UK frame usually results in a poor fit for sheets and valances. Stick to UK sizes unless your bed frame and bedding are specifically EU compatible.
Is it safe to use a thick mattress on a children’s bunk bed?
Bunk beds sold in the UK must meet BS EN 747. The top-bunk guard rail must rise at least 16cm above the mattress surface. Use only the maximum mattress depth stated by the manufacturer. Top bunks are not recommended for children under 6 years old.
Related guides
- How to Measure for a Bed in a Sloped Ceiling Room
- Small Double Bed Room Size Requirements UK
- Loft Room Bed Layout Ideas: Arranging Furniture Around Awkward Angles
- How to Fit a King Size Bed in a Small Room: Realistic UK Advice
- Guest Room Bed Size Guide: Choosing the Right Bed for Visitors
- Guest Bed That Folds Away: Space-Saving Solutions for Spare Rooms