King-size mattress (US)
King-size mattress (US) measures 2,032.0mm × 1,930.0mm. It weighs about 68,000.0g.
Dimensions
| Length | 2,032.0 mm |
|---|---|
| Width | 1,930.0 mm |
| Weight | 68,000.0 g |
King mattress
A king mattress measures 76 inches (193 cm) wide and 80 inches (203 cm) long. It is the widest standard mattress size available, giving two people about as much individual space as sleeping on separate twin mattresses. This page covers the exact dimensions, how it compares to other sizes, and room and doorway considerations.
- Dimensions
- California King variation
- Mattress size comparison
- Recommended room size
- Per-person sleeping space
- Doorway and moving considerations
- Frequently asked questions
- What are the exact dimensions of a king mattress?
- What room size do I need for a king bed?
- What is the difference between a king and California King?
- How much wider is a king than a queen mattress?
- Why do king box springs come in two pieces?
- Related objects
Dimensions
| Measurement | Inches | Centimeters |
|---|---|---|
| Width | 76 | 193.0 |
| Length | 80 | 203.2 |
California King variation
A California King, a less common alternative, measures 72 x 84 inches, 4 inches narrower but 4 inches longer than a standard king. This shape suits taller sleepers or narrower bedrooms where the extra length matters more than extra width.
Mattress size comparison
| Size | Width (in) | Length (in) |
|---|---|---|
| Queen | 60 | 80 |
| King | 76 | 80 |
| California King | 72 | 84 |
A king is 16 inches wider than a queen but the same length. This makes king mattresses ideal for couples who want more personal space without needing extra length, while a California King suits households that need the reverse tradeoff.
Recommended room size
A king mattress is best suited to bedrooms at least 12 by 12 feet, since the extra width requires more clearance on both sides of the bed for walking space and furniture placement. In smaller rooms, a king bed can feel like it dominates the space, leaving little room for a dresser or seating area.
Per-person sleeping space
For two people sharing a king mattress, each person gets about 38 inches of width, equivalent to a full twin mattress each. This is a significant upgrade in personal space compared to a queen, where each person only gets about 30 inches.
Doorway and moving considerations
Because a king mattress is 76 inches wide, moving it through standard interior doorways (typically 32 inches wide) requires angling the mattress carefully, similar to a queen. Most king mattresses today are designed to bend or roll somewhat for easier transport through hallways and stairwells, though box springs for a king often come split into two pieces specifically to ease this process.
Frequently asked questions
What are the exact dimensions of a king mattress?
76 x 80 inches (193 x 203 cm), the widest standard mattress size sold.
What room size do I need for a king bed?
A bedroom of at least 12 by 12 feet is generally recommended to comfortably accommodate a king bed with adequate walking space.
What is the difference between a king and California King?
A standard king is 76 x 80 inches, while a California King is 72 x 84 inches, narrower but longer, better suited for taller sleepers or narrower rooms.
How much wider is a king than a queen mattress?
16 inches wider (76 vs 60 inches), though both share the same 80-inch length.
Why do king box springs come in two pieces?
Splitting the box spring into two halves makes it much easier to maneuver through doorways, hallways, and stairwells that would otherwise struggle to fit a single 76-inch-wide piece.
Related objects
Similar in Size
Frequently Asked Questions
How long is a King-size mattress (US)?
A King-size mattress (US) is 2,032.0mm (203.2cm) long.
How much does a King-size mattress (US) weigh?
A King-size mattress (US) weighs about 68,000.0g.