Bed Size Calculator
Avoid cramped bedrooms and restless nights. Get personalized mattress size recommendations that fit your room, sleepers, and lifestyle.
Measure usable space excluding built-ins.
Recommended bed
King
76" x 80"
Best for couples who want maximum width.
Clearance summary
Side clearance ~28"
Foot clearance ~88"
Fits current room dimensions.
Alternative sizes
California King (72" x 84") • Queen (60" x 80")
How to Use This Calculator
Measure the room
Record wall-to-wall dimensions and note door swings, closets, or heaters that affect usable space.
Enter sleeper preferences
Consider the tallest sleeper, co-sleeping habits, and desired walkway space.
Review recommended size
Use the suggested bed size and clearance notes to plan the layout before ordering furniture.
Formula
Required room width = Bed width + 2 x Clearance
Required room length = Bed length + Foot clearance
Example: Queen bed (60" x 80") with 30" clearance each side needs roughly 120" width and 110" length.
Full Description
Choosing the right mattress size ensures comfortable sleep and easy circulation around the room. This calculator evaluates bed-to-room proportions based on your available space, sleeper height, and lifestyle factors like pets.
It highlights when a recommended mattress might be too large, suggests alternative sizes, and offers layout notes to maximize storage and traffic flow.
Use it while shopping for mattresses, planning guest rooms, or upgrading beds as your family grows.
Frequently Asked Questions
How much clearance should I leave around a bed?
Leave at least 24 inches on each accessible side and at the foot. Thirty to thirty-six inches feels more comfortable.
What if my room is very narrow?
Push the bed against a wall, use slimmer nightstands, consider a narrower mattress like a Full or Twin XL, or install pocket doors.
Is a California King better for tall people?
Yes. It is four inches longer than a standard King, making it a great option for sleepers over six feet tall.
Can a King bed fit in a small room?
It can, but expect limited space for nightstands and dressers. Measure carefully to ensure doors and drawers can open.