King Size Bed Measurement: Dimensions & Sizing & More 2026
A standard king size bed measures 76 inches wide by 80 inches long (193 cm × 203.2 cm) making it the widest bed you can buy in most furniture stores today. It’s about as wide as two twin mattresses placed side by side, giving couples maximum sleeping space without sacrificing length.
Whether you’re upgrading your master bedroom, comparing bed sizes before buying, or planning a hotel-style sleep setup, understanding the exact king size bed measurement helps you decide with confidence.
Standard King Size Bed Measurements (Eastern King)
The standard king also called the Eastern King — is the most common king bed sold across the United States. Here are all its dimensions in every unit you’ll use:
- Width: 76 inches | 193 cm | 1,930 mm | 6.33 feet
- Length: 80 inches | 203.2 cm | 2,032 mm | 6.67 feet
- Surface Area: 6,080 square inches | 39,245 cm² | 42.2 square feet
- Diagonal: approximately 107.6 inches | 273.3 cm | 8.97 feet
Standard King Dimensions Data Table
| Measurement | Inches | Centimeters | Millimeters | Feet |
|---|---|---|---|---|
| Width | 76 in | 193.0 cm | 1,930 mm | 6.33 ft |
| Length | 80 in | 203.2 cm | 2,032 mm | 6.67 ft |
| Diagonal | ~107.6 in | ~273.3 cm | ~2,733 mm | ~8.97 ft |
| Surface Area | 6,080 sq in | 39,245 cm² | — | 42.2 sq ft |
The king’s 76-inch (193 cm) width gives each person about 38 inches (96.5 cm) of personal sleeping space. That’s the same as a full twin mattress each for both sleepers at once.
Its 80-inch (203.2 cm) length comfortably fits adults up to 6 feet 4 inches (193 cm) tall. Taller sleepers should consider the California King for extra length.
King Size Bed Measurement Chart
Use this master chart to reference king bed specs at a glance. It covers the mattress, frame, headboard, bedding, and room requirements all in one place.
King Mattress Thickness by Type
| Mattress Type | Thickness (Inches) | Thickness (cm) | Total Bed Height |
|---|---|---|---|
| Budget Foam | 6–8 in | 15.2–20.3 cm | 18–22 in (45.7–55.9 cm) |
| Standard Innerspring | 9–11 in | 22.9–27.9 cm | 21–25 in (53.3–63.5 cm) |
| Pillow-Top | 12–14 in | 30.5–35.6 cm | 24–28 in (61–71.1 cm) |
| Luxury Hybrid | 14–16 in | 35.6–40.6 cm | 26–30 in (66–76.2 cm) |
King Bed Frame Dimensions
A standard king bed frame adds 2 to 4 inches (5.1 to 10.2 cm) to each side of the mattress. The total framed footprint typically reaches 78 to 84 inches wide (198.1 to 213.4 cm) and 83 to 86 inches long (210.8 to 218.4 cm).
Platform frames sit 12 to 14 inches (30.5 to 35.6 cm) off the floor. Traditional box spring frames raise the sleep surface to 18 to 23 inches (45.7 to 58.4 cm) before adding your mattress.
King Headboard Dimensions
| Headboard Style | Width (Inches) | Height (Inches) | Width (cm) | Height (cm) |
|---|---|---|---|---|
| Standard King | 78–80 in | 28–36 in | 198.1–203.2 cm | 71.1–91.4 cm |
| Low Profile | 78–80 in | 14–20 in | 198.1–203.2 cm | 35.6–50.8 cm |
| Tall Statement | 78–80 in | 48–60 in | 198.1–203.2 cm | 121.9–152.4 cm |
| Floor-to-Ceiling | 78–80 in | 72–96 in | 198.1–203.2 cm | 182.9–243.8 cm |
King Bed Sheet Sizes
| Sheet Type | Dimensions (Inches) | Dimensions (cm) | Notes |
|---|---|---|---|
| Fitted Sheet | 76 × 80 in | 193 × 203.2 cm | Standard pocket depth 12–15 in |
| Flat Sheet | 108 × 102 in | 274.3 × 259.1 cm | Generous overhang all sides |
| Pillowcase (King) | 20 × 40 in | 50.8 × 101.6 cm | Longer than standard |
| Duvet / Comforter | 104 × 90 in | 264.2 × 228.6 cm | Full drape coverage |
| Deep Pocket Fitted | 76 × 80 in + 18 in pocket | 193 × 203.2 cm + 45.7 cm | For thick mattresses |
Always check the pocket depth on fitted king sheets. Mattresses thicker than 14 inches (35.6 cm) need deep pocket sheets with at least 15 to 18 inches (38.1 to 45.7 cm) of pocket depth.
California King vs Standard King Measurements
The California King and Standard King look similar at first glance. But their dimensions serve very different sleepers.
The California King is narrower and longer than the Standard King. The Standard King is wider but shorter. Here’s the exact breakdown:
| Feature | Standard King (Eastern King) | California King |
|---|---|---|
| Width | 76 in (193 cm) | 72 in (182.9 cm) |
| Length | 80 in (203.2 cm) | 84 in (213.4 cm) |
| Surface Area | 6,080 sq in (42.2 sq ft) | 6,048 sq in (42.0 sq ft) |
| Width (mm) | 1,930 mm | 1,829 mm |
| Length (mm) | 2,032 mm | 2,133.6 mm |
| Best For | Couples wanting max width | Tall sleepers over 6’4″ |
Width difference: A Standard King is 4 inches (10.2 cm) wider than a California King. That extra width equals roughly the width of a standard iPhone laid flat.
Length difference: A California King is 4 inches (10.2 cm) longer than a Standard King. For anyone taller than 6 feet 4 inches (193 cm), that extra length prevents feet from hanging off the edge.
Sheet compatibility: Standard King and California King sheets are not interchangeable. Always buy sheets labeled specifically for your bed type. Using a Standard King fitted sheet on a California King leaves 4 inches (10.2 cm) of uncovered mattress at the foot.
Surface area: Both beds have almost identical surface areas within 32 square inches (206.5 cm²) of each other. The difference is purely in shape, not overall size.
Split King and Flex Top King Measurements
A Split King and Flex Top King give couples independent control of each sleep zone. Both use the same overall footprint as a Standard King.
Split King
A Split King uses two Twin XL mattresses placed side by side. Each Twin XL measures 38 inches wide by 80 inches long (96.5 cm × 203.2 cm). Together they form a 76 × 80 inch (193 × 203.2 cm) sleeping surface — identical to a Standard King.
| Measurement | Each Twin XL | Combined Split King |
|---|---|---|
| Width | 38 in (96.5 cm) | 76 in (193 cm) |
| Length | 80 in (203.2 cm) | 80 in (203.2 cm) |
| Thickness | 10–14 in (25.4–35.6 cm) | Same (independent) |
A Split King works perfectly with adjustable bed bases. Each person raises or lowers their side independently without disturbing their partner. Couples with different sleep preferences one firm, one soft — choose this setup consistently.
Flex Top King (Split Head King)
A Flex Top King splits only the top portion of the mattress usually the head section while the foot remains one connected piece. The overall dimensions stay at 76 × 80 inches (193 × 203.2 cm), exactly matching a Standard King.
| Section | Measurement (Inches) | Measurement (cm) |
|---|---|---|
| Total Width | 76 in | 193 cm |
| Total Length | 80 in | 203.2 cm |
| Split Head Section | 38 in wide × 36–40 in long | 96.5 cm × 91.4–101.6 cm |
| Unified Foot Section | 76 in wide × 40–44 in long | 193 cm × 101.6–111.8 cm |
The Flex Top King suits couples who want independent head elevation for reading, watching TV, or reducing snoring while still sleeping on a connected mattress at the foot. It feels more like one bed than a Split King does.
Room Size Requirements for King Beds
A king bed’s large footprint demands careful room planning. Always measure your room before purchasing.
Minimum and Ideal Room Sizes
| King Bed Type | Minimum Room Size | Ideal Room Size |
|---|---|---|
| Standard King | 12 ft × 10 ft (365.8 × 304.8 cm) | 13 ft × 13 ft (396.2 × 396.2 cm) |
| California King | 12 ft × 12 ft (365.8 × 365.8 cm) | 14 ft × 12 ft (426.7 × 365.8 cm) |
| Split King | 12 ft × 10 ft (365.8 × 304.8 cm) | 13 ft × 13 ft (396.2 × 396.2 cm) |
Minimum room width: Your room must be at least 12 feet (365.8 cm) wide to fit a Standard King with walkway space on both sides. In a room narrower than this, you’ll have less than 18 inches (45.7 cm) of clearance — too tight for comfortable movement.
Minimum room length: Allow at least 10 feet (304.8 cm) of room length for a Standard King. This gives you 24 inches (61 cm) of clearance at the foot enough to open drawers and walk freely.
Clearance Guidelines for King Beds
| Location | Minimum Clearance | Comfortable Clearance |
|---|---|---|
| Each side of bed | 18 in (45.7 cm) | 24–30 in (61–76.2 cm) |
| Foot of bed | 24 in (61 cm) | 36–48 in (91.4–121.9 cm) |
| Door/closet swing | 36 in (91.4 cm) | 48 in (121.9 cm) |
| Dresser walkway | 36 in (91.4 cm) | 42–48 in (106.7–121.9 cm) |
Side clearance tip: Leave at least 24 inches (61 cm) on each side if you plan to add nightstands. This keeps the room from feeling cramped and gives you room to make the bed comfortably.
Small room solution: In a 12 × 12 foot (365.8 × 365.8 cm) room, push the king bed against one wall. You gain walkway space on the open sides but lose access from one side — a fair trade in tighter spaces.
King Size Bed Measurement Variations Worldwide
The term “king size bed” means different things in different countries. A UK king is not the same as a US king. Always check local sizing before buying internationally.
International King Bed Size Comparison
| Country / Region | Local Name | Width (Inches) | Length (Inches) | Width (cm) | Length (cm) |
|---|---|---|---|---|---|
| USA — Standard King | Eastern King | 76 in | 80 in | 193 cm | 203.2 cm |
| USA — California King | Cal King | 72 in | 84 in | 182.9 cm | 213.4 cm |
| United Kingdom | UK King | 60 in | 78 in | 152.4 cm | 198.1 cm |
| United Kingdom | UK Super King | 72 in | 78 in | 182.9 cm | 198.1 cm |
| Europe (EU) | EU King | 63 in | 79 in | 160 cm | 200 cm |
| Australia | AU King | 72 in | 80 in | 183 cm | 203 cm |
| Japan | Japanese King | 63 in | 79 in | 160 cm | 200 cm |
| Canada | Canadian King | 76 in | 80 in | 193 cm | 203.2 cm |
US vs UK King: A UK King measures only 60 inches wide (152.4 cm) — the same width as a US Queen bed. If you buy a UK king mattress for a US king frame, it won’t fit. You’ll have an 8-inch (20.3 cm) gap on each side.
US vs EU King: A European King measures 63 inches wide by 79 inches long (160 cm × 200 cm). It’s 13 inches (33 cm) narrower and 1 inch (2.5 cm) shorter than a US Standard King. European sheets also won’t fit a US king frame correctly.
Australia vs US: An Australian King measures 72 inches wide by 80 inches long (183 cm × 203 cm). It’s 4 inches (10.2 cm) narrower than a US Standard King but matches the California King width almost exactly.
Traveling or moving internationally? Never assume your mattress or bedding will transfer. Always recheck local sizing charts and buy new sheets for the country you’re in.
Key Takeaway: King Size is Not Universal
| Measurement | US Standard King | UK Super King | EU King | AU King |
|---|---|---|---|---|
| Width | 76 in / 193 cm | 72 in / 182.9 cm | 63 in / 160 cm | 72 in / 183 cm |
| Length | 80 in / 203.2 cm | 78 in / 198.1 cm | 79 in / 200 cm | 80 in / 203 cm |
| Fits US King Frame? | ✅ Yes | ❌ No | ❌ No | ❌ No |
The US Standard King at 76 × 80 inches (193 × 203.2 cm) is the largest king size in common use worldwide. It gives you more sleeping surface than any other country’s king bed option.
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Frequently Asked Questions
What are the exact measurements of a standard king size bed?
A standard king size bed (Eastern King) measures exactly 76 inches wide by 80 inches long (193 cm × 203.2 cm). The surface area equals 6,080 square inches (42.2 square feet). These dimensions are consistent across all major US mattress brands.
How much bigger is a king bed than a queen bed?
A king bed is 16 inches (40.6 cm) wider than a queen bed. A queen measures 60 × 80 inches (152.4 × 203.2 cm), while a king measures 76 × 80 inches (193 × 203.2 cm). Both share the same 80-inch (203.2 cm) length, so the king’s advantage is entirely in width.
What is the difference between a California King and a Standard King?
A California King measures 72 inches wide by 84 inches long (182.9 cm × 213.4 cm). A Standard King measures 76 inches wide by 80 inches long (193 cm × 203.2 cm). The California King is 4 inches (10.2 cm) narrower but 4 inches (10.2 cm) longer — better for tall sleepers over 6 feet 4 inches (193 cm).
What room size do I need for a king size bed?
The minimum room size for a king bed is 12 feet × 10 feet (365.8 cm × 304.8 cm). For comfortable movement and space for nightstands, choose a room at least 13 feet × 13 feet (396.2 cm × 396.2 cm). Always leave 18 inches (45.7 cm) minimum on each side of the bed for easy access.
Is a Split King the same size as a Standard King?
Yes a Split King uses two Twin XL mattresses (38 × 80 inches / 96.5 × 203.2 cm each) to create the same 76 × 80 inch (193 × 203.2 cm) footprint as a Standard King. The overall sleeping area is identical. The difference is that each side operates independently on an adjustable base.
Are king size bed measurements the same worldwide?
No king bed measurements vary significantly by country. A US Standard King measures 76 × 80 inches (193 × 203.2 cm), while a UK King measures only 60 × 78 inches (152.4 × 198.1 cm) the same width as a US queen. Always check the local size chart before buying a mattress, frame, or bedding internationally.
Conclusion
The king size bed measurement of 76 inches wide by 80 inches long (193 cm × 203.2 cm) appears consistently across US mattresses, frames, headboards, and bedding as the gold standard for spacious sleep. This substantial size equals 42.2 square feet (3.92 square meters) of sleeping surface roughly the same footprint as two standard bathtubs placed side by side with room to spare.
Now that you know every king size bed measurement, you can compare Standard King, California King, and Split King options accurately, plan your bedroom layout with exact clearance numbers, and shop for the right sheets and frame with complete confidence.
