When it comes to buying a new bed or mattress, knowing the exact dimensions is critical. In the UK, king size beds are one of the most popular choices due to the balance of space and comfort they offer. Whether you’re upgrading from a double or optimising a new bedroom layout, understanding king size bed dimensions in different units will help ensure a perfect fit for your lifestyle and your space.
Standard UK King Size Bed Dimensions
A standard UK king size mattress measures:
- 150 cm wide x 200 cm long
- 1.5 metres wide x 2.0 metres long
- 59.1 inches wide x 78.7 inches long
- 4.92 feet wide x 6.56 feet long
- 1500 mm wide x 2000 mm long
These measurements apply to the mattress only. Bed frames may be larger, depending on style, design, or headboard features. Some frames may add an additional 5–10 cm to each side.
UK Bed Size Comparison Chart
To understand how a king size bed compares with other popular UK bed sizes, here’s a full breakdown in multiple units:
| Bed Size | Width (cm) | Length (cm) | Width (in) | Length (in) | Width (feet) | Length (feet) |
|---|---|---|---|---|---|---|
| Single | 90 | 190 | 35.4 | 74.8 | 2.95 | 6.23 |
| Double | 135 | 190 | 53.1 | 74.8 | 4.43 | 6.23 |
| King | 150 | 200 | 59.1 | 78.7 | 4.92 | 6.56 |
| Super King | 180 | 200 | 70.9 | 78.7 | 5.91 | 6.56 |
This shows that a king bed is 15 cm wider than a double and 30 cm narrower than a super king. It’s also slightly longer than both single and double beds.
Why Choose a King Size Bed?
A UK king size bed strikes a sweet spot between comfort and space efficiency. Here are some key reasons people choose a king size:
- Spacious for two: No more bumping elbows in the middle of the night.
- Better sleep quality: More space means fewer disturbances from your partner.
- Ideal for taller people: The 200 cm (6.56 ft) length gives ample legroom.
- Perfect for master bedrooms: A king bed fits well in medium to large rooms without overwhelming the space.
Tools You Need to Measure Your Space
Before buying a king bed, it’s crucial to assess your room size. Here’s what you’ll need:
- Tape Measure (5 metres or longer) – Essential for length and width.
- Laser Distance Measurer – For high accuracy in larger rooms.
- Painter’s Tape or Chalk – To mark the outline of the bed on the floor.
- Pen & Notebook or Measuring App – To track all your measurements and plan layouts. here is detail guide to measure room size. https://www.meister.com/en/inspiration/good-planning
How to Measure for a King Size Bed
Follow these steps to ensure your room can comfortably accommodate a king bed:
1. Measure the Mattress Area
- Mattress dimensions: 150 cm x 200 cm
- Add frame size: typical frame adds 5–10 cm on each side
- Total footprint estimate: 160 cm x 210 cm
2. Measure Your Room Size
- Ideal minimum room size: 3.2m x 3.2m
- Allows for movement, bedside tables, and walking clearance
- Larger rooms (4m x 4m or more) offer more comfort
3. Use Painter’s Tape or Chalk
- Mark the exact footprint on your floor using tape
- Include bed frame dimensions
- Walk around it to test movement space
Visualising Bed Size vs. Room Size
Below is a simple guide to help you assess room fit:
| Room Size (m) | Fit for King Bed? | Comments |
|---|---|---|
| 3m x 3m | ❌ Tight | Bed dominates room; minimal walk space |
| 3.2m x 3.5m | ✅ Good | Allows basic furniture + walk space |
| 4m x 4m | ⭐ Ideal | Ample space for bed, wardrobes, seating |
Tip: For tight spaces, consider a slim-frame or divan-style king bed with under-bed storage.
Tips Before Buying a King Size Bed
- Measure stairways and hallways: Especially for king bed frames and headboards.
- Modular frames or split bases: Easier to move into upper-floor bedrooms.
- Storage options: Look for ottoman or drawer-based king beds for added functionality.
- Slim-frame beds: Great for tight rooms while still fitting a full king mattress.
- Trial period: Choose a mattress with a trial period if you’re unsure about comfort or fit.
Frequently Asked Questions
Is a UK King the Same as a US King?
No. A UK king is 150 x 200 cm, while a US king is 193 x 203 cm. So, the US king is wider but slightly shorter.
Can I Use European or American Bedding on a UK King?
European king bedding (160×200 cm) may fit but can feel tight. US king bedding will usually be too large.
Are King Mattresses Available in Split Versions?
Yes. Many retailers offer zip and link king mattresses, which are two singles joined together—ideal for tight stairwells.
Final Thoughts
The UK king size bed is a top-tier choice for couples, tall individuals, and anyone looking for luxurious sleep space. With its 150 x 200 cm dimensions, it provides ample width and length while still fitting into most modern bedrooms. Be sure to measure your room, doorways, and available clearance before buying, and don’t forget to factor in the bed frame size too.
A well-planned purchase ensures both comfort and style, giving you the sleep you deserve without crowding your space.
Roman is a seasoned expert in mattress development with over a decade of experience in sleep technology, material innovation, and product engineering. He has played a key role in designing and refining sleep solutions for leading mattress brands, with a deep focus on ergonomics, pressure relief, and sleep quality optimization.
With a background in product design and biomechanics, Roman combines scientific research with hands-on development to create mattresses that address real-world sleep issues—from spinal alignment to temperature regulation. His work has contributed to several award-winning mattress lines known for their comfort, durability, and user satisfaction.
