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California King mattress dimensions

California King is 72 by 84 inches in the selected US nominal profile.

Published by BedFit Atlas · Updated 2026-10-20

Dimensions at a glance

US · Nominal bed dimensions
Size	Width (in)	Length (in)	Area (sq ft)
California KingReviewed 2026-09-18	72	84	42

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1. California King

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California King is 72 by 84 inches in the selected US nominal profile. Relative to the cited King, it is 4 inches narrower and 4 inches longer. Its listed footprint is 6048 square inches; use the comparison page to inspect the difference from King. The extra length changes the space needed at the foot of the bed, while the narrower width can change side clearance. The room tool checks both orientations with the head against a wall, but does not place the bed around doors or other obstructions. Manufacturer guides can publish a different nominal California King width. Keep the chosen source profile consistent rather than mixing widths from one guide with comparisons from another. Confirm the purchased mattress, frame and fitted bedding dimensions separately.

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Sources and review dates

Data reviewed 2026-09-18.

Bed Sizes and Mattress Dimensions: Guide + Comparison Chart — Purple Purple, US mattress dimensions guide; selected nominal reference values, not product measurements or universal tolerances.
Published room-fit geometry, version 1 — Bed Dimensions