King Size Bed Dimensions Guide (2025) – Inches, Feet & CM

What Size Is a King Bed? A Quick Guide to Dimensions & Fit

When comfort is your top priority, few choices beat a king-size bed. But before buying one, it’s important to know the standard king bed dimensions, how it compares to other mattress sizes, and whether your bedroom has enough space for it.

Standard King Bed Size (Eastern King)

The standard king bed size in the UK and US is:

• 76 inches wide

• 80 inches long

• (193 cm x 203 cm)

This generous space makes the king bed perfect for couples, especially those who share their sleep space with children or pets. It’s the widest standard mattress size available.

California King vs. Standard King

People often confuse the California King with the standard Eastern King. Here’s how they differ:

• Standard King: 76″ x 80″ — wider

• California King: 72″ x 84″ — longer

If you’re taller than 6’4″, the California King might suit you better. But if you value elbow room over legroom, the standard king is ideal.

King Bed Frame Dimensions

A king bed frame typically adds a few inches to the mattress size to account for the structure and any extra design elements. Expect:

• 78–82 inches wide

• 82–86 inches long

Always measure your bedroom space carefully before buying the frame.

Ideal Room Size for a King Bed

To comfortably fit a king-size bed, your room should be at least:

• 12 feet x 12 feet (3.65 m x 3.65 m)

This gives enough space to walk around the bed and place nightstands or other furniture. Smaller rooms may feel cramped with a king bed.

King Bed vs. Other Mattress Sizes

Here’s a quick comparison:

Bedding for a King Bed

To outfit a king-size bed, look for bedding labeled specifically for “King”:

• Fitted Sheet: 76″ x 80″

• Comforter: ~102″ x 90″

• King Pillows: 20″ x 36″

Avoid using queen-size bedding—it won’t fully cover the mattress.

🛏️ FAQs: What Size Is a King Bed?

Q1. What are the dimensions of a king-size bed?
A: A standard king-size bed measures 76 inches wide by 80 inches long (193 cm x 203 cm). It’s the widest standard bed available, offering ample space for two sleepers.

Q2. Is a king bed bigger than a queen bed?
A: Yes, a king bed is both wider and larger than a queen. While a queen measures 60″ x 80″, a king offers 76″ x 80″ — that’s 16 inches of extra width.

Q3. What is the difference between a king and a California king bed?
A: A standard king is wider (76″ x 80″), while a California king is longer but narrower (72″ x 84″). Choose based on whether you prefer more legroom or more width.

Q4. Will a king-size bed fit in my bedroom?
A: Ideally, your bedroom should be at least 12 x 12 feet to fit a king bed comfortably, allowing space for walking and other furniture.

Q5. What size is a UK king bed?
A: In the UK, a standard king bed measures 150 cm x 200 cm (59″ x 79″), which is slightly smaller than the US king. The UK equivalent to the US king is the Super King (180 cm x 200 cm).

Q6. Can king-size sheets fit a California king mattress?
A: No. Standard king sheets won’t fit a California king because the dimensions differ. Always buy bedding specifically labeled for California King or Standard King.

Q7. How many people can sleep on a king bed?
A: A king bed comfortably sleeps two adults with plenty of personal space. It can also accommodate a child or a pet alongside.

Q8. Is a king-size bed good for couples?
A: Absolutely. The king bed’s wide sleeping area gives each partner 38 inches of personal space — equivalent to a twin bed each!

Final Word

A king-size bed offers ample sleeping space, luxurious comfort, and is ideal for larger bedrooms. Whether you’re upgrading your sleep or furnishing a master suite, knowing the correct king mattress dimensions and frame size helps you make a smart purchase.

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