Proportional comparison
King vs California King dimensions
United States California King is 10.1 cm narrower than United States King, and 10.2 cm longer.
United StatesKing193 × 203.2 cm
VS
United StatesCalifornia King182.9 × 213.4 cm
- Width difference
- -10.1 cm
- Length difference
- +10.2 cm
- Area difference
- -0.02 m²
Labels are not equivalence.
Even a close geometric match may not share fitted sheets, frames, bases, or finished bedding. Measure all products involved.
Room fit
Compare the outer frame, too.
These diagrams compare mattress tops. A bed frame can extend beyond the mattress on every side, and its headboard or footboard can change the usable room clearance.
Plan both orientations