Quick Answer: A standard king bed in Canada measures 76 inches wide by 80 inches long (193 x 203 cm), giving each partner 38 inches of personal sleeping width. That is the same width as an entire twin mattress per person. A king needs a bedroom of at least 12' x 12' and costs roughly 30% more than a queen.
In This Guide
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A king mattress is the largest standard bed size you will find at most Canadian retailers. At 76 inches wide, it gives two adults the kind of personal space that makes you wonder why you waited so long to upgrade.
But a king is not just a bigger mattress. It requires a bigger room, bigger sheets, a bigger bed frame, and a bigger budget. Those practical details matter, and they are the reason some couples who want a king end up happier with a queen once they measure their bedroom.
This guide covers the exact dimensions, the differences between king variants, and the honest room and budget math you need to make a good decision.
King Mattress Dimensions in Canada
The standard king (also called Eastern king) measures 76 inches wide by 80 inches long (193 cm x 203 cm). In Canada and the United States, these dimensions are identical.
| Measurement | Inches | Centimetres | Feet |
|---|---|---|---|
| Width | 76" | 193 cm | 6' 4" |
| Length | 80" | 203 cm | 6' 8" |
| Surface Area | 6,080 sq in | 39,226 sq cm | 42.2 sq ft |
| Per-person width (2 sleepers) | 38" | 97 cm | 3' 2" |
Each partner gets 38 inches of personal sleeping width on a king. To put that in perspective, a twin mattress is 38 inches wide. So a king essentially gives each person their own twin-sized sleeping lane while sharing the same bed. Compare that to a queen, where each partner gets 30 inches, and you can feel why couples who upgrade to a king rarely go back.
The 80-inch length is the same as a queen, accommodating sleepers up to about 6'4" comfortably. If you need more length, the California king extends to 84 inches.
Standard King vs. California King
This is the comparison that confuses people most. The California king is not bigger than a standard king. It is actually slightly smaller in total sleeping area.
| Feature | Standard King | California King |
|---|---|---|
| Width | 76" | 72" |
| Length | 80" | 84" |
| Total Area | 6,080 sq in | 6,048 sq in |
| Per-person width | 38" | 36" |
| Best for | Maximum couple width | Sleepers over 6'4" |
| Canadian availability | Widely stocked | Limited, often special order |
| Bedding availability | Easy to find | Harder to source |
The Cal king trades 4 inches of width for 4 inches of length. You lose shoulder room but gain legroom. Unless you or your partner is over 6'4" and specifically needs those extra inches at the foot, the standard king is the more practical choice in Canada.
Why Cal Kings Are Rare in Canada
California king mattresses were originally designed for the larger master bedrooms common in California ranch-style homes. Most Canadian retailers do not stock Cal king inventory because demand is low and the size requires separate SKUs for mattresses, sheets, protectors, and frames. If you need a Cal king, expect to special order and wait for delivery. Sheets and protectors will also require more searching than standard king bedding.
Split King for Adjustable Beds
A split king uses two Twin XL mattresses (each 38" x 80") placed side by side to create the same 76" x 80" sleeping surface as a standard king. The total dimensions are identical. The difference is what happens underneath.
With a split king on two independent adjustable bases, each partner controls their own side. One person can raise their head for reading or acid reflux relief while the other lies flat. This is not possible with a single-piece king on a split adjustable base because the mattress fights the different angles.
Dorothy, Sleep Specialist: "Split kings are our fastest-growing category. Couples where one person snores, has acid reflux, or likes to read in bed while the other sleeps flat. The independence changes the conversation from 'I need my own room' to 'I need my own adjustable base.'"
Split King Trade-offs
- The gap: There is a seam down the centre where the two mattresses meet. Some couples notice it, others do not. A king-sized mattress pad or topper placed over both mattresses can bridge the gap.
- Sheets: You need two sets of Twin XL fitted sheets instead of one king fitted sheet. A king flat sheet and duvet still work on top.
- Cost: Two Twin XL mattresses plus two adjustable bases costs more than a single king mattress on one base.
Room Size for a King Bed
A king mattress needs a bedroom of at least 12 feet by 12 feet (144 square feet). That gives you:
- 24 inches of walking space on each side of the bed
- 30 inches of clearance at the foot
- Room for two nightstands (18-24 inches each)
In a room smaller than 12' x 12', a king mattress will fit, but it will dominate the space. You may not have room for a dresser, and the walking paths around the bed will feel cramped. If your master bedroom measures between 10' x 10' and 12' x 12', a queen is usually the more practical choice.
The Tape Measure Test
Before you commit to a king, lay painter's tape on your bedroom floor in a 76" x 80" rectangle where the bed would go. Live with it for a day or two. Walk around it. Open your closet doors. Pull out dresser drawers. If everything still works with the tape outline in place, the king will work. If you are stepping over tape to get to the bathroom at 2 a.m., stick with a queen.
Getting a King Through the Door
A king mattress at 76 inches wide is trickier to deliver than a queen (60 inches). Standard Canadian interior doorways are 32-36 inches wide, so the mattress must be stood on its side and sometimes flexed through tight turns. Hallway corners, narrow staircases, and sharp angles between rooms are the real challenges.
We deliver king mattresses to Brantford and surrounding areas regularly. Our team can usually tell you over the phone whether a king will fit through your home based on your description of the layout. If it is genuinely too tight, a compressed mattress-in-a-box option can arrive in a box roughly 19" x 19" x 44" and expand to full size once unboxed inside your bedroom.
King vs. Queen: The Real Difference
The king adds 16 inches of width compared to a queen. That is where all the extra space goes. The length stays the same at 80 inches.
| Feature | Queen | King | Difference |
|---|---|---|---|
| Width | 60" | 76" | +16" |
| Length | 80" | 80" | Same |
| Per-person width | 30" | 38" | +8" |
| Surface Area | 4,800 sq in | 6,080 sq in | +1,280 sq in |
| Min. Room Size | 10' x 10' | 12' x 12' | +44 sq ft |
Those 8 extra inches per person are the difference between "fine" and "spacious." If you share a bed and frequently wake your partner by rolling over or spreading out, a king addresses the root cause. For a full comparison of all Canadian sizes, see our mattress sizes Canada chart.
Brad, Owner, 40+ years of experience: "The way I explain it to customers: on a queen, you are aware your partner is there. On a king, you have to reach over to find them. If both of you sleep warm or one of you tosses and turns, that distance matters more than most people expect."
King Bedding and Frame Sizes
King-size bedding is widely available in Canada, but it costs more than queen bedding because of the additional fabric required. Here is what you need:
| Bedding Item | King Size | Notes |
|---|---|---|
| Fitted Sheet | 76" x 80" | Check pocket depth for thicker mattresses (15"+) |
| Flat Sheet | 108" x 102" | Wider than queen to allow side drape |
| Duvet / Comforter | 104" x 90" | Rectangular, not square like queen |
| Mattress Protector | 76" x 80" | Must be king-specific, queen will not fit |
| Pillowcases | King: 20" x 36" | King pillowcases are 10" longer than standard |
One detail people miss: a king duvet (104" x 90") is rectangular, not square. A queen duvet (90" x 90") is square. If you accidentally buy a queen duvet for a king bed, it will be 14 inches too narrow and someone will be pulling covers all night.
King Bed Frames and Box Springs
King box springs typically come in two halves (each 38" x 80"), making them much easier to deliver through narrow hallways and up staircases than a one-piece queen box spring. This is a practical advantage in older Brantford homes where doorways and stairwells were built to tighter tolerances. The two halves sit inside the bed frame side by side, and the king mattress sits on top as a single piece. Our bed frame collection includes king-compatible options.
What a King Mattress Costs in Canada
King mattresses typically cost 25-35% more than the same model in queen size. The price difference reflects the additional materials needed for 16 extra inches of width.
At Mattress Miracle, our Restonic ComfortCare King is $2,051 (compared to $1,619 for the queen). It carries 1,440 individually wrapped coils across the 76" x 80" surface, maintaining the same support density per square inch as the smaller sizes. The coil count scales with the mattress area, so you are not stretching fewer coils over more space.
For a premium option, the Restonic St. Charles or Elizabeth King runs around $3,150, featuring 1,188 coils in a 15-inch profile with Talalay copper latex comfort layers.
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We are a family-owned mattress store in Brantford, helping our community sleep better since 1997. Come try mattresses in person and get honest, no-pressure advice.
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Call 519-770-0001King Sizes at Canadian Retailers
Every Canadian retailer sells "king" at the same 76 by 80 standard. The differences are in price, lead time, delivery model, and how the mattress arrives at your bedroom door.
| Retailer | Standard King | Cal King | Split King | Delivery |
|---|---|---|---|---|
| Sleep Country | 76 x 80" | Yes (special order common) | Yes | Same-week, white-glove available |
| The Brick | 76 x 80" | Limited | Yes | Scheduled, fee for in-room setup |
| Leon's | 76 x 80" | Limited | Yes | Scheduled, in-room setup add-on |
| Endy | 76 x 80" | Yes | No (Endy does not offer split) | Free Canada-wide, bed-in-a-box |
| Douglas | 76 x 80" | Yes | Split-King available on Original | Free Canada-wide, bed-in-a-box |
| Dormez-Vous | 76 x 80" | Yes (Quebec) | Yes | Same-week, in-province |
| Mattress Miracle | 76 x 80" | Special order | Yes (popular for adjustable bases) | White-glove with old mattress removal |
King Bed in Quebec (Très Grand Lit / Lit King)
Quebec retailers list the standard king as "très grand lit" or "lit king". The dimensions are identical to the rest of Canada at 193 by 203 cm. The California king is "très grand lit californien" or "king californien" at 183 by 213 cm.
- Lit double: Double / Full (137 by 191 cm)
- Grand lit / Lit Queen: Queen (152 by 203 cm)
- Très grand lit / Lit King: Standard king (193 by 203 cm)
- Très grand lit californien: California king (183 by 213 cm)
If you are shopping at Dormez-Vous, Matelas Mira, or any Quebec retailer, "très grand lit" without further qualification almost always means the standard 76 by 80 king.
Oversize King Variants (Wyoming, Texas, Alaskan)
Beyond the standard king and California king, three oversize variants exist. None of them are stocked at major Canadian retailers. They are custom-order only, with significantly higher prices and limited bedding options.
| Variant | Dimensions | Use case |
|---|---|---|
| Wyoming King | 84 x 84 in (213 x 213 cm) | Square bed, very tall sleepers, families with co-sleeping kids |
| Texas King | 80 x 98 in (203 x 249 cm) | Tall sleepers (over 6 feet 8), large dogs sharing the bed |
| Alaskan King | 108 x 108 in (274 x 274 cm) | Multi-person family beds, statement-piece master suites |
If you are set on an oversize variant, expect a 6 to 12 week wait, custom sheet sourcing, and a price tag two to three times a standard king. For most Canadian shoppers wanting more space, the standard king or split king is the practical choice.
Foundation Requirements and Sheet Pocket Math
Two practical details that catch new king owners off guard.
Foundation requires center support. A king mattress is wide enough that most manufacturer warranties require either a king foundation with a center support beam, or two twin XL foundations side by side, with at least 5 center support legs touching the floor. Without proper center support, the mattress can sag down the middle within a year and the warranty is void. Ask your retailer to confirm the foundation meets the manufacturer's spec before you buy.
Modern king mattresses are taller than older sheets expect. Many king mattresses now run 14 to 18 inches thick. Standard fitted sheet pockets only go to 12 inches. Add a topper and you can be looking at 20+ inches total. Buy deep-pocket (13 to 17 inches) or extra-deep (18+ inches) fitted sheets and check the pocket depth specification on the package, not just the mattress size. The rule: sheet pocket should be at least 2 inches deeper than your mattress thickness.
Split king sheet warning: If you have a split king on adjustable bases, you need two twin XL fitted sheets, not one king fitted sheet. Buyers routinely return the wrong sheets after delivery. The flat sheet, duvet, and pillowcases can stay king size. Only the fitted sheets need to be split.
Frequently Asked Questions
What are the dimensions of a king bed in Canada?
A standard king bed in Canada measures 76 inches wide by 80 inches long (193 cm x 203 cm). This is the same size as a king bed in the United States. Each partner gets 38 inches of personal sleeping width, the same width as a twin mattress.
Is a California king bigger than a regular king?
No. A California king (72" x 84") is actually 32 square inches smaller than a standard king (76" x 80"). The Cal king trades 4 inches of width for 4 inches of length, making it better for tall sleepers but narrower for couples.
What size room do I need for a king bed?
A king bed fits comfortably in a room that is at least 12 feet by 12 feet (144 square feet). This allows for 24 inches of clearance on each side for getting in and out of bed plus room for nightstands and a dresser. Rooms smaller than 12' x 12' will feel cramped with a king.
What is a split king mattress?
A split king is two Twin XL mattresses (each 38" x 80") placed side by side on a king frame. The total sleeping surface is the same as a standard king (76" x 80"), but each side operates independently on its own adjustable base. This lets one partner raise or lower their side without affecting the other.
Can I test a king mattress in Brantford?
Yes. Mattress Miracle at 441 1/2 West Street in Brantford has king mattresses from Restonic available to test in our showroom. We recommend both partners come in together and lie on the mattress for 10-15 minutes. Call (519) 770-0001 to check which models are on the floor.
Sources
- Sleep Foundation. (2024). King Size Mattress Dimensions. Sleep Foundation. sleepfoundation.org
- Jacobson, B.H., et al. (2008). Effect of prescribed sleep surfaces on back pain and sleep quality in patients with low back pain. Applied Ergonomics, 39(3), 396-402. doi.org/10.1016/j.apergo.2007.08.002
- Verhaert, V., et al. (2011). Ergonomics in bed design: the effect of spinal alignment on sleep parameters. Ergonomics, 54(2), 169-178. doi.org/10.1080/00140139.2010.538725
- National Sleep Foundation. (2023). The Ideal Sleep Environment. Sleep Health, 9(1), 12-18.
Visit Our Brantford Showroom
Mattress Miracle
441 1/2 West Street, Brantford
Phone: (519) 770-0001
Hours: Mon-Wed 10-6, Thu-Fri 10-7, Sat 10-5, Sun 12-4
Thinking about upgrading to a king? Bring your room measurements and come lie on our Restonic king models side by side with the queens. The width difference is something you need to feel for yourself. Family-owned since 1997.