A double bed measures 54 x 75 inches, which is 4.5 x 6.25 feet or 137 x 191 cm. In the USA, it is also called a full bed.
This guide shows the standard double bed dimensions in simple numbers. You will also see how a double compares to a queen, what 180×200 cm means, and how to check the fit for your room.
Table of Contents
Double Bed Size in Inches, Feet & Cm
The double bed size is the same as a full size mattress. Both names describe one bed. The numbers below come from standard full bed dimensions.
| Unit | Width | Length |
|---|---|---|
| Inches | 54 in | 75 in |
| Feet | 4.5 ft | 6.25 ft |
| Centimeters | 137 cm | 191 cm |
| Meters | 1.37 m | 1.91 m |
The surface area is about 28.13 sq ft (2.62 sq m). Most full mattresses are 9 to 12 inches thick. Thickness changes the bed height, not the width or length.
How much room does each sleeper get? Two people share 54 inches, so each gets about 27 inches. A twin bed is 38 inches wide and gives one sleeper more space than that.
Who is a double bed good for?
- Single adults under 6 feet
- Teens who have outgrown a twin
- Guest rooms, small bedrooms, and studio apartments
Who should pick a bigger bed? Sleep experts note that couples may find 54 inches tight. The same goes for anyone over 6 feet or above 230 pounds.
Understanding spatial requirements is essential for a comfortable home, but the importance of precise layout planning extends far beyond the bedroom. Whether you are mapping out room clearances for new furniture or calculating standard parking lot dimensions for a commercial property, accurate measurements are the key to maximizing any functional space.
Double Bed Dimensions in USA
In the USA, the standard double bed dimensions are 54 x 75 inches (137 x 191 cm). US stores almost always label this bed “full”. Sleep Doctor points out that US makers rarely use the word “double.” So search for “full size bed” to find more results.
Quick facts for US buyers:
- Mattress size: 54 x 75 in
- Typical frame size: about 2 to 4 inches larger on each side
- Sheets to buy: full or double
- Canada: uses the same sizes, per Canadian retailers
Is a US double longer than a twin? No. Both are 75 inches long. The double is just 16 inches wider.
What if you are tall? The 75-inch length is about 6 feet 3 inches. Taller sleepers often choose a queen at 80 inches, so their feet do not hang off the end.
Double Bed vs Queen and King Size
A queen is 6 inches wider and 5 inches longer than a double. A king adds even more width. Here are the standard US mattress sizes side by side.
| Bed | Inches | Cm |
|---|---|---|
| Twin | 38 x 75 | 97 x 191 |
| Double / Full | 54 x 75 | 137 x 191 |
| Queen | 60 x 80 | 152 x 203 |
| King | 76 x 80 | 193 x 203 |
| California King | 72 x 84 | 183 x 213 |
Which one should you pick?
- Choose a double for one sleeper or a small room.
- Choose a queen for most couples. It is also the common upgrade from a double.
- Choose a king for extra width or a large master bedroom.
Larger beds also cost more. The mattress, frame, and bedding all go up in price.
Double Bed Size Around the World
The name “double” does not mean one size everywhere. Each region sets its own double bed size in cm.
- USA: 137 x 191 cm
- UK: 135 x 190 cm
- Australia: 138 x 188 cm
- Japan: 140 x 195 cm
- Continental Europe: 140 x 200 cm
Some markets sell a “full” at 60 x 78 inches, as seen in this regional size guide. Always check the listed numbers, not just the name.
What size bed is 180×200 cm? It converts to about 71 x 79 inches. That is a European king. It is wider and longer than a US double.
What about 200×200 cm? It is about 79 x 79 inches. It is a square super king. It is not a double and not a queen.
Quick conversion rule: divide centimeters by 2.54 to get inches.
Room Size, Frame & Bedding Fit
A bed that fits on paper can still feel tight in the room. Measure first and buy second.
Room tips:
- Tape the 54 x 75 inch shape on the floor.
- Leave about 2 feet of walking space on each open side.
- Check door swings and closet doors.
Frame tips: A bed frame is usually 2 to 4 inches wider and longer than the mattress. Add that extra to your floor plan.
Bedding tips:
- Buy full or double sheets. Queen sheets will not fit well.
- Use deep-pocket sheets for thick mattresses.
- A double duvet is often about 78 x 86 inches, but duvet sizes vary by brand. Check the label.
Double Bed Dimensions FAQs
What is the size of a double bed?
A double bed is 54 x 75 inches (137 x 191 cm). In feet, that is 4.5 x 6.25 ft.
How big is a double bed vs queen?
A queen is 6 inches wider and 5 inches longer. It measures 60 x 80 inches, while a double measures 54 x 75 inches.
What size bed is 180×200 cm?
It is about 71 x 79 inches. This is a European king size, not a US standard.
Is a double bed 200×200?
No. A double bed is 137 x 191 cm. A 200×200 cm bed is much wider.
Is 200×200 a queen size?
No. A US queen is 152 x 203 cm. A 200×200 cm bed is a square super king.
What size is a double bed?
A double bed is 54 inches wide and 75 inches long. It is the same as a full size bed.
Conclusion
A double bed is 54 x 75 inches, or 137 x 191 cm. It suits one sleeper, teens, and small rooms best. Couples usually do better with a queen. Measure your room, frame, and bedding before you buy.
Elizabeth Queen is a Owner and consumer research writer at HowLongThings.com, specializing in product lifespan, durability, and everyday household research. She’s passionate about helping readers make smarter, longer-lasting buying decisions.
