Bed Size Calculator: Compare Twin, Queen, King & More
Compare standard bed sizes in inches and centimetres, and check whether a bed fits your room. Enter your room size, choose a bed size, and the calculator tells you the dimensions and the space left beside the bed.
How this calculator works
Bed dimensions are the standard sizes used in the US. Twin is 38 by 75 inches (97 by 191 cm). Twin XL is 38 by 80 inches (97 by 203 cm). Full is 54 by 75 inches (137 by 191 cm). Queen is 60 by 80 inches (152 by 203 cm). King is 76 by 80 inches (193 by 203 cm). California King is 72 by 84 inches (183 by 213 cm). Space beside the bed is the room width minus the bed width, divided by two, and space at the foot is the room length minus the bed length. Allow at least 24 inches beside the bed and 36 inches at the foot.
Related guide: Bedroom Furniture Guide: What You Need and Where It Goes
How to use this calculator
- Measure your room carefully — length, width and height — and note doors and windows.
- Enter the numbers above and check the result.
- Round up to the next pack or tin size, and add about 10% for waste and touch-ups.
- Read the full guide: Bedroom furniture guide — it explains the measurements, the mistakes to avoid and the FAQs.
Frequently asked questions
What size bed should I buy?
Measure the room and leave at least 24 inches on each side. A queen suits most couples; a king needs a room of at least 12 square metres.
What is the difference between a King and a California King?
A King is 76 by 80 inches, wider and shorter. A California King is 72 by 84 inches, narrower and longer, and it suits taller people.
How much space should I leave beside the bed?
At least 24 inches (60 cm) on each side for getting in and out, and 36 inches (90 cm) at the foot if you can.
What is a Twin XL bed?
A Twin XL is 38 by 80 inches, the same width as a Twin but 5 inches longer. It suits taller single sleepers and college dorms.