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Mattress Size Guide & Bed Size Calculator

Find the perfect mattress size for your bedroom. Compare bed dimensions in inches and centimeters.

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Measurement Unit

Number of Sleepers

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Enter your room dimensions to see which mattress sizes fit

Tallest Sleeper's Height

Mattress Sizes Comparison

Size	Dimensions	Best For	Min Room Size
Twin / Single	38 × 75 in	Children, teens, single adults	7 × 10 ft
Twin XL	38 × 80 in	Tall single sleepers, dorms	7 × 10 ft
Full / Double	54 × 75 in	Single adults wanting space	9 × 10 ft
Queen	60 × 80 in	Couples, master bedrooms	10 × 10 ft
King	76 × 80 in	Couples, families with kids	12 × 12 ft
California King	72 × 84 in	Tall sleepers, narrow rooms	12 × 12 ft

💡 Choosing the Right Mattress Size

Room Clearance

Leave at least 24 inches (60 cm) on each side of the bed for walking space.

Height Matters

If you're over 6'2" (188 cm), consider Twin XL, Queen, King, or California King for extra length.

Couples Need Space

Each person should have at least 30 inches (76 cm) of width for comfortable sleep.

Consider Future Needs

If you're planning to share your bed with a partner or pets, size up.

🛏️ Factors to Consider

Sleep Position

Side and stomach sleepers typically need more width than back sleepers.

Movement During Sleep

Active sleepers benefit from larger mattresses to avoid disturbing their partner.

Room Layout

Account for nightstands, dressers, and walking paths around the bed.

Budget

Larger mattresses cost more, including sheets, mattress protectors, and bed frames.

🌍 International Bed Sizes

Mattress sizes vary by country. Here's how US sizes compare to other regions:

UK

Single: 90 × 190 cm
Double: 135 × 190 cm
King: 150 × 200 cm
Super King: 180 × 200 cm

Europe (EU)

Single: 90 × 200 cm
Double: 140 × 200 cm
Queen: 160 × 200 cm
King: 180 × 200 cm

Asia (Japan/Korea)

Single: 97 × 195 cm
Double: 140 × 195 cm
Semi-Double: 120 × 195 cm
Queen: 160 × 195 cm
King: 180 × 195 cm

Mattress dimensions may vary slightly between manufacturers. Always verify exact measurements before purchasing. This guide provides standard US mattress sizes.

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