US King vs Queen: compare mattress and room-space dimensions
US King mattress-only: recommended clear rectangle about 3.15 m (10 ft 4 in) wide by 2.64 m (8 ft 8 in) long; US Queen mattress-only: recommended clear rectangle about 2.74 m (9 ft) wide by 2.64 m (8 ft 8 in) long. These are market-specific planning estimates, not code minimums; only named frame examples include a frame, and furniture, doors and circulation remain excluded.
US King mattress
- Market
- US
- Mattress width
- 193.0 cm6 ft 4 in
- Mattress length
- 203.2 cm6 ft 8 in
- Mattress-only physical width
- 193.0 cm6 ft 4 inFrame dimensions not measured.
- Mattress-only physical length
- 203.2 cm6 ft 8 inFrame dimensions not measured.
- Recommended clear room width
- 315.0 cm10 ft 4 in
- Recommended clear room length
- 264.2 cm8 ft 8 in
Assumptions for us king mattress
- Recommended clear dimensions are planning guidance, not code minimums.
- Apply the recommendation to each accessible side; actual access needs vary. Editorial comfort guidance, not a regulation.
- FitWise modeling assumption: 24 inches at the foot. Sleep Foundation discusses space around each side; applying that figure at the foot is an extrapolation, not direct source guidance or a code minimum. The geometry engine treats the headboard as against a wall.
US Queen mattress
- Market
- US
- Mattress width
- 152.4 cm5 ft 0 in
- Mattress length
- 203.2 cm6 ft 8 in
- Mattress-only physical width
- 152.4 cm5 ft 0 inFrame dimensions not measured.
- Mattress-only physical length
- 203.2 cm6 ft 8 inFrame dimensions not measured.
- Recommended clear room width
- 274.3 cm9 ft 0 in
- Recommended clear room length
- 264.2 cm8 ft 8 in
Assumptions for us queen mattress
- Recommended clear dimensions are planning guidance, not code minimums.
- Apply the recommendation to each accessible side; actual access needs vary. Editorial comfort guidance, not a regulation.
- FitWise modeling assumption: 24 inches at the foot. Sleep Foundation discusses space around each side; applying that figure at the foot is an extrapolation, not direct source guidance or a code minimum. The geometry engine treats the headboard as against a wall.
Sources and evidence
- Fitwise internal reference-size and clearance convention Fitwise.stream; accessed 2026-10-06
Internally documented round-number reference sizes and comfort-clearance recommendations used when no single external standard applies; see specs/DATA_MODEL.md §2.
- Mattress Sizes 101: Finding Your Perfect Fit — Bedroom Dimensions Sleep Foundation; accessed 2026-10-06
Editorial recommendation to leave about 24 inches of space around each side of a bed to avoid a cramped feeling. This is guidance, not a building code or accessibility requirement.
- Mattress Sizes 101: Finding Your Perfect Fit Sleep Foundation; accessed 2026-10-06
Publishes US nominal mattress dimensions in inches. US King 76×80, Queen 60×80, Full 54×75. Values converted to millimetres; "Full" is used as the US-market term rather than treating Double as a universal name.