Foundations · Low profile
Low-profile box spring height and dimensions
Current low-profile foundations are about 5–5.5 inches high; one manufacturer also offers a 2-inch ultra-low option. Width and length remain size-specific.
Semrush US · 6,600 searches/mo · KD 19| Label or calculation | Dimensions | What it means |
|---|---|---|
| Low-profile examples | 5–5.5 in high (12.7–14 cm) | Current Tempur-Pedic, Beautyrest, and Sealy examples. |
| Ultra-low example | 2 in high (5.1 cm) | Current Tempur-Pedic option. |
| Standard-profile examples | 9 in high (22.9 cm) | Useful comparison when calculating total bed height. |
Lower profile does not by itself establish construction, load capacity, mattress compatibility, or warranty compliance.
Profile changes bed height, not mattress area
A lower foundation can reduce the top-of-mattress height by several inches while keeping the same nominal support footprint.
Calculate every vertical layer
Add frame support height, foundation height, mattress thickness, topper, and pad. Product edges can compress, so treat the result as a planning estimate.
Measurement method
Start with the product and space you actually have.
- 1
Measure the frame opening. Record inside width, length, support ledges, and center support.
- 2
Check finished dimensions. Use the foundation specification, not only the size label.
- 3
Add vertical layers. Combine frame support height, foundation, mattress, pad, and topper.
- 4
Verify the support system. Follow the mattress and frame manufacturers’ current requirements.
Questions, answered
Frequently asked questions
How tall is a low-profile box spring?
The current examples checked are about 5 to 5.5 inches high.
What is an ultra-low foundation?
One current manufacturer offers a 2-inch foundation, but options and approved combinations are manufacturer-specific.