Box Spring Height Chart

A standard box spring is published at 9 inches. Low profile versions run about 5 inches, and some low profile king box springs are sold as low as 3 inches. The right one depends on how tall you want the finished bed to sit: pairing a 9 inch box spring with a thick mattress can push total bed height well past what most adults find comfortable to sit on and rise from.

Both are the same fabric-wrapped foundation construction; the difference is height. A standard box spring is about 9 inches tall, while a low profile version is about 5 inches, roughly half. Some king-size low profile box springs go as low as 3 inches. People choose low profile when they want a shorter, easier-to-climb-into bed, or when a thick mattress on top would otherwise push total height too high.

No. A platform bed's closely spaced slats are already a complete foundation, and adding a box spring on top adds unnecessary height and, with a memory foam mattress, can trap heat underneath. If the platform's slats are spaced too far apart for a specific mattress's warranty requirements, a thin, rigid bunkie board is the usual fix, not a full box spring.

Bunkie boards are published at about 2 inches tall, far thinner than either a low profile or standard box spring. They are a flat, rigid slab rather than a springy foundation, most often used to adapt a frame originally built for a box spring so it can properly support a foam or hybrid mattress without adding much extra height to the finished bed.

Adjustable bases run around 15 inches, noticeably taller than even a standard 9 inch box spring, because the base has to house a motor and hinge mechanism inside its frame. That height is typical rather than a fixed industry figure, so check the exact listed height for the model you are considering before pairing it with a thick mattress, since the combined total can climb past what many adults find comfortable.

A total height, measured from the floor to the top of the mattress, of roughly 18 to 25 inches is the range most adults find easiest to sit on and rise from with their feet flat and knees near a right angle. Below about 18 inches is easy for children but harder on stiff knees or hips getting up. Above about 30 inches is tall enough that a shorter sleeper may not comfortably reach the floor while seated.