United States · market convention
Split King bed dimensions
A Split King uses two nominal 38 × 80 inch Twin XL mattresses for a combined 76 × 80 inch footprint—the same nominal width and length as a standard US King.
Semrush US · 9,900 searches/mo · KD 23- Centimeters
- 193 × 203.2 cm
- Inches
- 76 × 80 in
- Feet & inches
- 6 ft 4 in × 6 ft 8 in
- Meters
- 1.93 × 2.032 m
- Area
- 3.92 m² · 42.21 ft²
- Source status
- high confidence · agrees
The combined nominal footprint is 76 × 80 in, made from two 38 × 80 in Twin XL mattresses. Gaps, adjustable-base articulation, and finished dimensions can affect fit.
The split changes the components, not the footprint
Each sleeper has a separate Twin XL mattress. On compatible adjustable bases the halves can move independently, but the center seam and actual finished dimensions still matter.
Use two fitted sheets
Split King sets commonly use two Twin XL fitted sheets plus one King-size top sheet or top-bedding layer. Verify how the chosen sheet set is packaged.
Nearest international equivalents
What is closest to Split King?
- Width
- 0 cm
- Length
- -0.2 cm
- Width
- -10 cm
- Length
- -0.2 cm
- Width
- +10 cm
- Length
- -0.2 cm
- Width
- -13 cm
- Length
- -3.2 cm
Bedding fit
Use the mattress measurements, not only “Split King.”
Applicable market labels include Split King, Two Twin XL fitted sheets. These labels do not guarantee a particular finished sheet, duvet, comforter, blanket, or bedspread dimension.
For a fitted sheet, also measure mattress depth, topper, pad, and extra pocket allowance. For top bedding, choose the side and foot coverage you want.
Calculate bedding coverageQuestions, answered
Frequently asked questions
Is a Split King two Twin XL mattresses?
Yes. Two nominal 38 × 80 in Twin XL mattresses combine to 76 × 80 in.
Do Split King sheets fit a regular King?
The fitted components are different: a Split King setup uses two Twin XL fitted sheets, while a regular King uses one 76 × 80 in fitted sheet.