How Long Is a King Size Bed? 80 Inches Long vs Queen Size Compared

How long is a king size bed? A king size bed is 80 inches long and 76 inches wide — that is 6 feet 8 inches long and 6 feet 4 inches wide, or about 203 by 193 centimetres.

The king bed is the widest standard bed you can buy, and it is also one of the longest: at 80 inches, it is the same length as a queen bed, but 16 inches wider. That extra width is the whole point of a king — two people get about 38 inches each, about the width of a twin bed apiece.

This guide compares king size bed length with 12 everyday things — other beds, doors, windows, home objects, animals and tech — so you can picture 80 inches long and 76 inches wide at a glance, with pictures for every comparison.

Quick Conversion: How Long Is a King Size Bed (80 Inches Long)?

Reference Guide King Size Bed Conversion Chart
Unit	King size bed
Length	80 in (203 cm)
Width	76 in (193 cm)
Diagonal	About 110 in
Area	6,080 sq in (42.2 sq ft)
Length in feet	6 ft 8 in
Length in yards	2.22 yd

Quick tip: A king bed is 80 inches long — the same length as a queen bed — but at 76 inches wide it is 16 inches wider than a queen.

Quick Reference List: 12 Things About as Long as a King Size Bed

Reference Guide 12 Things About as Long as a King Size Bed
Category	Common Objects
Other Beds	A twin XL bed, length A California king bed A bunk bed, length
Doors and Windows	A sliding glass door, height A garage door, height A floor-to-ceiling window, height
Home, Animals and Tech	A hot tub An air hockey table A TV stand, width A large area rug, width A camel, height at the hump A 75-inch TV, diagonal

Here is the full list of king size bed length comparisons covered in this guide, organized by category.

How Long Is a King Size Bed — Other Beds

Other beds give the most direct king size bed length references, because every bed is measured the same way — length by width.

1. A Twin XL Bed

A twin XL bed, 80 inches long, like a king size bed

A twin XL bed is about 80 inches long. That is close to a king size bed, which is also 80 inches long — the two beds are the same length.

This twin-XL-length king bed comparison shows that a king is not longer than every bed: a twin XL matches it at 80 inches. The difference is width — a twin XL is only about 38 inches wide, about half a king’s 76 inches.

2. A California King Bed

A California king bed, about 84 inches long, close to a king size bed

A California king bed is about 84 inches long. That is close to a standard king bed at 80 inches long — the California king is about 4 inches longer.

This California-king-length king bed comparison is the one to remember when shopping: a California king trades width for length, at about 84 inches long but only about 72 inches wide, while a standard king is about 80 inches long and about 76 inches wide.

3. A Bunk Bed

A bunk bed, about 80 inches long, like a king size bed

A bunk bed is about 80 inches long. That matches a king size bed, which is also 80 inches long.

This bunk-bed-length king bed comparison is a kids’-room reference: the bunk bed your children sleep on is about as long as the king bed in the main bedroom. The king is just much wider, at about 76 inches against the bunk’s roughly 40 inches.

How Long Is a King Size Bed — Doors and Windows

Doors and windows are practical king size bed length references, because they are built to the same 80-inch scale as a bed.

4. A Sliding Glass Door

A sliding glass door, about 80 inches tall, like a king size bed is long

A sliding glass door is about 80 inches tall. That is close to a king size bed, which is 80 inches long — the door standing up and the bed lying flat are the same length.

This sliding-door-height king bed comparison is a patio reference: the glass door you walk through to the garden is about as tall as your king bed is long. Stand the bed on its end and it would just about reach the top of the door.

5. A Garage Door

A garage door, about 84 inches tall, close to a king size bed

A garage door is about 84 inches tall. That is close to a king size bed at 80 inches long — the door is only about 4 inches taller than the bed is long.

This garage-door-height king bed comparison is a driveway reference: a king bed stood on its end would reach almost to the top of a standard garage door. The 4-inch gap is about the width of a hand.

6. A Floor-to-Ceiling Window

A floor-to-ceiling window, about 80 inches tall, like a king size bed is long

A floor-to-ceiling window is about 80 inches tall. That matches a king size bed, which is 80 inches long.

This window-height king bed comparison is a living-room reference: the tall window beside your sofa is about as tall as your king bed is long. It is a good way to picture 80 inches while standing in a room with big windows.

How Long Is a King Size Bed — Home, Animals and Tech

Home objects, animals and tech round out the list of king size bed length comparisons, showing how tubs, tables, rugs and screens can land on the same 80 inches as a king bed.

7. A Hot Tub

A hot tub, about 84 inches long, close to a king size bed

A hot tub is about 84 inches long. That is close to a king size bed at 80 inches long — the tub is only about 4 inches longer than the bed.

This hot-tub-length king bed comparison is a backyard reference: a king bed laid beside a hot tub would end just short of the tub’s far edge. Both are built for two people to stretch out in, and both land around 80 to 84 inches.

8. An Air Hockey Table

An air hockey table, about 84 inches long, close to a king size bed

An air hockey table is about 84 inches long. That is close to a king size bed at 80 inches long — the table is only about 4 inches longer than the bed.

This air-hockey-length king bed comparison is a games-room reference: the table you play on is about as long as the bed you sleep on. A king bed laid beside an air hockey table would end just short of the table’s far end.

9. A TV Stand

A TV stand, about 80 inches wide, like a king size bed is long

A TV stand is about 80 inches wide. That matches a king size bed, which is 80 inches long.

This TV-stand-width king bed comparison is a living-room reference: the wide stand under a big television is about as wide as a king bed is long. It is a handy way to picture 80 inches without leaving the sofa.

10. A Large Area Rug

A large area rug, about 80 inches wide, like a king size bed is long

A large area rug is about 80 inches wide. That is close to a king size bed, which is 80 inches long — the rug’s width and the bed’s length are the same.

This area-rug-width king bed comparison is a floor reference: a large rug under a coffee table is about as wide as a king bed is long. A king bed would fit neatly across the rug with a little room to spare on each side.

11. A Camel

A camel, about 84 inches tall at the hump, close to a king size bed

A camel stands about 84 inches tall at the top of its hump. That is close to a king size bed at 80 inches long — the camel is only about 4 inches taller than the bed is long.

This camel-height king bed comparison is the most memorable animal match in this guide: a camel’s hump rises to about the length of a king bed laid on its side. A king bed stood on its end would reach just below the camel’s hump.

12. A 75-Inch TV

A 75-inch TV, about 75 inches diagonally, close to a king size bed

A 75-inch TV measures about 75 inches diagonally across its screen. That is close to a king size bed, which is 80 inches long — the TV’s diagonal is only about 5 inches shorter than the bed.

This 75-inch-TV king bed comparison is a tech reference: the big screen on your wall is almost as long, corner to corner, as your king bed. It is a good way to picture 80 inches while sitting in front of the television.

FAQ Section

How long is a king size bed?

A king size bed is 80 inches long and 76 inches wide (about 203 by 193 centimetres). The exact size can vary slightly by brand, but 80 by 76 inches is the standard.

How long is a king size bed vs a queen size bed?

A king bed and a queen bed are both 80 inches long. The difference is width: a king is 76 inches wide, while a queen is 60 inches wide — so a king is 16 inches wider.

How long is a king size bed in feet?

A king size bed is 6 feet 8 inches long and 6 feet 4 inches wide. Its diagonal measures about 110 inches, or about 9 feet 2 inches.

Is a king size bed bigger than a California king?

A standard king is wider (76 inches vs about 72 inches) but a California king is longer (about 84 inches vs 80 inches). A standard king covers more total area, at about 42.2 square feet.

How can I picture 80 inches without a tape measure?

Picture a queen-size bed at about 80 inches long, a sliding glass door at about 80 inches tall, or a TV stand at about 80 inches wide — all close to a king size bed’s 80 inches.

Conclusion

So, how long is a king size bed? In this king size bed length guide, the answer is 80 inches long and 76 inches wide — 6 feet 8 inches by 6 feet 4 inches, about 203 by 193 centimetres, with a diagonal of about 110 inches. That is the same length as a queen bed, a twin XL and a bunk bed, but 16 inches wider than a queen. From a garage door to a camel, these 12 everyday comparisons make a king bed’s size easy to picture. Next time you shop for a bed, remember the length is 80 inches — and the width is what makes a king a king.