How Big Is a Tempur-Pedic King? Your 2025 Size Guide

If you're debating a king and wondering if it actually fits, you're not alone. Here's the thing: once you know the exact dimensions of tempur pedic king mattress options—and the little nuances—you can buy with zero guesswork.

The official size (so you can measure once, not twice)

A standard Tempur-Pedic King measures 76 inches wide by 80 inches long (about 193 x 203 cm). That footprint is the same across the brand’s king models—memory foam, hybrid, and Breeze. Depth (height) varies by model, but the surface area doesn’t. If you came here for the quick answer on the dimensions of tempur pedic king mattress sizes, that’s it: 76 x 80 in.

King vs. California King vs. Split King

Here’s where folks get tripped up. A regular King is 76 x 80 in—wider, shorter. A California King is 72 x 84 in—narrower by 4 inches, longer by 4 inches. If you’re tall or your room is long and slim, Cal King can make more sense. Split King is two Twin XLs (38 x 80 in each) placed side-by-side, totaling the same 76 x 80 footprint as a standard King. The split is brilliant for couples who want independent adjustable bases or different firmnesses. Believe it or not, bedding is the only part that gets slightly different with Split King (two fitted sheets, one king top sheet/duvet).

How thick are Tempur-Pedic kings, really?

Most Tempur-Pedic kings land between 10 and 13 inches tall. As of 2025, you’ll typically see: TEMPUR-Cloud around 10 in; TEMPUR-Adapt and Adapt Hybrid about 11 in; TEMPUR-ProAdapt roughly 12 in; LuxeAdapt around 13 in; TEMPUR-Breeze models (PRObreeze ~12 in, LUXEbreeze ~13 in). Small year-to-year tweaks happen, but that range is your safe bet. If you use a deep, plush topper, plan for bedding with an even deeper pocket.

Will it fit your room and frame? The practical check

Room fit is about walkways more than raw numbers. Aim for 24–30 inches of clearance on the sides you’ll walk. In a 12 x 12 ft room, a king works, but it’ll feel cozier—especially with nightstands. In a 12 x 14 or 13 x 13 ft room, the flow feels easier. Platform and upholstered frames can add 1–4 inches to the overall width/length, while chunky headboards add visual bulk and a bit of depth. If you’re pairing with an adjustable base, remember the base height adds to your overall sleep height—great for ease of getting in/out of bed, but it can push your bedside lamp a touch low. Tiny detail, big daily impact.

Delivery, moving, and setup (so you don’t ding a wall)

Tempur-Pedic typically delivers most king models via in-home (white glove) service because these beds are heavy and not roll-packed like budget foam mattresses. The lighter TEMPUR-Cloud can ship boxed. If you’re carrying a king yourself, don’t fold it—Tempur material can flex a bit, but sharp bends are a no-go. Measure doorways, stair turns, and tight halls. Pro tip: the diagonal of a 76 x 80 rectangle is about 110 inches, which helps you visualize tricky corners. When in doubt, Split King simplifies everything.

Bedding that actually fits (no midnight sheet battles)

Standard king sheets fit a 76 x 80 mattress. Focus on pocket depth: for ~10–13 inch mattresses, deep-pocket sheets in the 14–18 inch range grab and hold without popping off. Split King setups use two Twin XL fitted sheets plus a king top sheet and duvet. A breathable protector is smart on Tempur foam—it keeps sweat and spills out without muffling the feel. If you’re comparing brands, keep the dimensions of tempur pedic king mattress in mind so your linens don’t feel loose or overly tight.

Quick measuring game plan

Grab painter’s tape, mark out 76 x 80 on the floor, and drop in your nightstands on the tape line. Walk around it. Open drawers. Sit on the edge where your chair would be. If you bump anything, a Split King or a California King might solve it. And if your frame has a tall footboard, double-check comforters in the winter—they shorten the perceived length a smidge.

Bottom line (and where to go next)

A Tempur-Pedic King is 76 x 80 in—simple as that. The magic is picking the right profile and base for your space. If you want the quick picks, I break down which Tempur-Pedic king suits different sleepers in my 2025 review at Consumer's Best—skim it when you’re ready, and I’ll point you straight to the models worth your money.