King Beds Online

Find king beds online at Mattress Firm to explore a range of styles, sizes and price points for your bedroom. Whether you’re creating a relaxing retreat or updating your sleep space, shopping online makes it easy to compare king beds and find an option that fits your needs. We make sleep easy™ with convenient online shopping and support from Sleep Experts®.

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Sleepy's Basics Metal Platform Bed

112

Starting at

$299⁹⁹

Tulo Traditional Metal Platform Bed with Headboard

Starting at

$249⁹⁹

Sleepy's Deluxe Darius Smart Bed

Starting at

$615⁹⁸

Sleepy's Signature Harley Bed Set

148

Starting at

$560⁹⁹

Tulo Rhea Platform Bed

Starting at

$416⁸⁰

Tulo Metal and Wood Slat Platform Bed

124

Starting at

$379⁹⁹

Sleepy's Deluxe Mixed Metal and Slatted Wood Platform Bed

Starting at

$799⁹⁹

Sleepy's Signature Tall Channel Tufted Upholstered Platform Bed

Starting at

$699⁹⁹

Baxton Studio Candace Luxe & Glamour Velvet Upholstered Bed

Starting at

$462⁹⁹

Sleepy's Signature Metal Modern Platform Bed

176

Starting at

$379⁹⁹

Sleepy's Deluxe Axle Square Upholstered Platform Bed

150

Starting at

$549⁹⁹

Sleepy's Deluxe Ironline Mixed Material Platform Bed

150

Starting at

$699⁹⁹

Sleepy's Signature Mid Century Pine Wood Platform Bed

Starting at

$629⁹⁹

Sleepy's Deluxe Alexis Wood Platform Bed Frame with Headboard

Starting at

$779⁹⁹

Sleepy's Deluxe Bethina Faux Leather Platform Bed

Starting at

$649⁹⁹

Sleepy's Deluxe Akami Bamboo Metal Platform Bed

Starting at

$549⁹⁹

Sleepy's Deluxe Maddon Platform Bed with Upholstered Headboard

Starting at

$549⁹⁹

Sleepy's Deluxe Mid Century Wood Spindle Platform Bed

Starting at

$729⁹⁹

Sleepy's Signature Mixed Material Wood Metal Modern Bed

Starting at

$699⁹⁹

Sleepy's Deluxe Diamond Stitch Upholstered Platform Bed

Starting at

$529⁹⁹

Sleepy's Basic Innerspring Firm Mattress

8744

Starting at

$249⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Pain
Bed Partner
Allergies
Toss and Turn

Sleepy's Rest Firm 2.0 Innerspring Mattress

7033

Starting at

$449⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Serta Perfect Sleeper Sleep Excellence Medium PillowTop Mattress

1463

Starting at

$1449⁹⁹

$1999⁹⁹

$550 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Toss and Turn
Temperature
Bed Partner

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 13.5" Plush Pillow Top Mattress

2806

Starting at

$1499⁹⁹

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Silver BRS900 11.75" Extra Firm Mattress

3333

Starting at

$1699⁹⁹

Extra Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Pain
Allergies
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 11.25" Firm Mattress

2258

Starting at

$1299⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Shopping for king beds online can make it easier to compare frame styles, dimensions, materials and features from the comfort of home. A standard king mattress measures 76 inches wide by 80 inches long, giving two sleepers generous personal space and creating a comfortable centerpiece for a spacious primary bedroom. A California king is slightly narrower at 72 inches wide but extends to 84 inches long, making it a practical choice for taller sleepers or rooms with a longer, more rectangular layout. Before choosing a frame, measure the room carefully and account for walkways, nightstands, dressers, doors and drawers that need to open fully. It is easy to focus on the mattress dimensions and overlook the frame’s overall footprint, particularly with upholstered headboards, thick side rails or built-in storage. Leaving enough room to move around the bed helps the space feel calm rather than crowded. It can also be useful to mark the planned dimensions on the floor with painter’s tape. Seeing the outline at eye level gives a much more realistic sense of how a king bed will fit than looking at measurements on a screen. Consider the room’s existing colors and textures as well. A wood frame can bring warmth to a room with woven fabrics and soft neutrals, while upholstered designs can add a quieter, more layered look. Metal frames often suit streamlined spaces and may offer a lighter visual profile. Storage beds can be especially helpful in rooms where extra space is limited, offering a place for spare linens, seasonal clothing or other items that would otherwise collect beneath the bed.

The support system is one of the most important details to review when buying king beds online. Many platform beds are designed with wood slats, a solid foundation or a combination of metal supports and center legs, so a separate box spring may not be needed. Other frames are made to work with a box spring or foundation, and some mattresses perform best on a particular type of support. Always check the manufacturer’s requirements for slat spacing, weight capacity, center support and foundation height before ordering. These details help the mattress rest evenly and can prevent surprises during setup. Remember that the mattress is usually sold separately from the bed frame, so plan for both pieces when comparing the total cost. Bedding, pillows and a foundation may also be separate purchases. For a finished look, choose sheets and blankets sized specifically for a king mattress, and account for mattress depth when selecting fitted sheets. You can explore coordinating options in King Bed Bedding to help complete the sleep space. Frame materials and construction also affect the experience of bringing a bed home. Solid wood, engineered wood, metal and upholstered surfaces each have different care needs, while a storage design may require additional assembly time and clearance around drawers. Read the delivery information closely, including whether the package arrives in multiple boxes, whether room-of-choice delivery is available and whether assembly is included. A clear path from the entrance to the bedroom can make delivery day much smoother, especially in homes with narrow hallways, staircases or sharp turns.

Style and everyday habits should guide the final choice as much as measurements do. A king bed can be a welcome upgrade for couples who value more room to stretch out, families who occasionally share the bed with children or pets, and sleepers who want space for reading, relaxing or working before the day begins. It may also suit a guest room in a larger home, where visitors can enjoy a familiar, comfortable setup without sacrificing sleeping space. If the bedroom doubles as a retreat during cooler months, look for a frame with a substantial headboard that creates a comfortable surface for sitting up with a book or morning coffee. Storage can make a noticeable difference in a guest room or apartment, particularly when there is no linen closet nearby. For a more timeless purchase, consider a neutral finish and a sturdy silhouette that can adapt when bedding, wall color or other furniture changes. Those drawn to a softer appearance may prefer padded upholstery, while sleepers who like a clean, open feel may gravitate toward simple rails and visible floor space. Price ranges can vary widely based on construction, materials, upholstery, storage and design details, so comparing features rather than price alone is worthwhile. Look for clear dimensions, care instructions, warranty information and customer reviews that discuss stability, assembly and long-term use. The right king bed should fit the room, support the mattress correctly and complement the way the space is used every day. With thoughtful planning, ordering a king bed online can turn an empty bedroom into a comfortable, well-organized place to rest and recharge.

What types of king beds can I shop for online? + -

You can explore a variety of king beds online, including upholstered beds, platform beds, panel beds, storage beds and adjustable-compatible frames. Compare materials, colors, finishes and design details to find a bed that suits your bedroom.

How do I choose a king bed style for my bedroom? + -

Consider your bedroom decor, preferred materials and desired features. Upholstered beds add a soft, inviting look, while wood and metal beds create a classic or modern feel. Storage beds can also help keep your space organized.

What materials are commonly used for king beds? + -

King beds are commonly made with wood, metal, engineered wood and upholstered materials such as linen or woven fabric. Each option offers a distinct look, so consider the finish, texture and overall style you want in your bedroom.

Can I find king beds with built-in storage? + -

Yes, many king beds include built-in drawers or lift-up storage compartments. These designs provide a convenient place to organize bedding, clothing and other bedroom essentials while keeping them out of sight.

How can I shop for king beds online at Mattress Firm? + -

Browse king beds online by style, material, color and features. Review product details and images to compare options, then choose a bed that complements your bedroom and supports your preferred sleep setup.