Twin to king converter kit: one real King from the two Twins you already own
You already own two good Twin or Twin XL mattresses. The Bedbinder Deluxe straps them into one King size bed that stays together.
4.1 out of 5 from 3,765 ratings · 250,000+ units sold · 7-year buckle warranty
What is a twin to king converter kit?
A twin to king converter kit turns two Twin or Twin XL mattresses into one King size bed, so they stop drifting apart and the gap in the middle stays closed.
- Most converter kits sold online bundle a foam strip for the seam with a set of straps. The straps are the part that holds the bed together.
- The Bedbinder Deluxe is that part, built properly: 3 straps with rounded nylon buckles that wrap under both mattresses.
- Two Twin XL mattresses side by side measure 76 by 80 inches, the size of a standard King. Two regular Twins come out 5 inches shorter.
- It costs $57.00, and a second one is 30% off. No tools, fitted in 60 seconds.
Two Twins pushed together still sleep like two beds
Pushing them together is easy. Keeping them together is the hard part.
Push two Twins together and they look like a King. Then you sleep on them.
Rolling over, sitting on the edge, getting in and out: every move pushes the mattresses a little further apart.
By morning there is a gap in the middle. Whoever sleeps closest to it ends up in it.
A foam strip hides the gap but does not hold anything. If the mattresses can still move, the gap comes back next to the foam.
What changes with the Bedbinder Deluxe
It doesn't hide the gap. It makes sure the gap can't open.
Two Twins that move as one King
Six things you notice the first night.
The gap stays closed
The straps hold both mattresses together, so they can't drift apart.
Nothing to feel in the middle
The straps sit under the mattresses, not on the sleeping surface.
You keep both mattresses
No new King to buy, no delivery, no old mattresses to haul away.
Back to two Twins anytime
Unclip the buckles and the guest room has two beds again.
Strong and washable
550 kg of pulling strength for the whole Bedbinder. Machine washable at 30 °C.
7-year buckle warranty
If a buckle breaks, you get a whole new Bedbinder.
Which two Twins make a King
Check this before you buy any converter kit.
| Two Twin XL | Two regular Twins | |
|---|---|---|
| Size together | 76 by 80 inches | 76 by 75 inches |
| Same as a standard King | Yes | 5 inches shorter |
| Fits the Bedbinder Deluxe | Yes | Yes |
The Bedbinder fits any two mattresses that are 140 to 200 cm wide together (about 55 to 79 inches), with a mattress height of 15 to 35 cm (about 6 to 14 inches).
Not sure about your beds? See two Twin beds together: what size.
Where a converter kit stops working
Three limits we would rather tell you now than read about in a review.
Adjustable bases
The Bedbinder works on an adjustable base when only the head end moves. Place the straps a little lower, toward the foot.
It does not work when both the head and the foot of each side move. Then the mattresses fold in places the straps can't follow.
Sheets
Two separate Twin sheets no longer work once the mattresses are one bed. You need one King fitted sheet over both, or a split-head King sheet on an adjustable base.
Tension
Pull the straps gently tight, not as hard as you can. Light tension is enough to hold two Twins together.
Strap converter, foam bridge kit or a new King mattress
Three ways to turn two Twins into a King, side by side. Only need the strap itself? See the twin bed connector.
| Bedbinder Deluxe | Foam bridge kit | New King mattress | |
|---|---|---|---|
| What holds the Twins together | 3 straps under both mattresses | The straps that come with it | One mattress, nothing to hold |
| What you feel in the middle | Nothing on the surface | A foam strip: a dip becomes a bump | Nothing |
| Setup | 60 seconds, no tools | Foam and straps to fit | Delivery and haul-away |
| What you keep | Both Twin mattresses | Both Twin mattresses | Neither, they're replaced |
| Back to two Twins | Unclip the buckles | Take it apart | No |
| No seam at all, even without bedding | No, honest: the seam is there, held closed | No, the foam covers it | Yes, one surface |
Want one surface with no seam at any cost? Then a new King is the honest answer. Want to keep the Twins you have? Then the straps do the work.
Convert two Twins to a King in 60 seconds
Straps under both mattresses, close the buckles, pull gently tight. No tools.
4.1 out of 5 from 3,765 ratings · 250,000+ units sold
Two Twins into one King, in their words
What US customers say about their Bedbinder.
The bed doesn't split in the middle.
“This definitely does the job! I combined two XL twin beds to create a king size bed. The bed doesn't split in the middle, and I haven't had to tighten it yet.”
So far it has done the trick.
“We have a split king (2 twins) and 2 big dogs. Sometimes the dogs' paws would get in between. We installed this about 8 inches from the bottom edge. So far it has done the trick!”
Two beds in one.
“This works so well for connecting two twin beds together to make one Cal king. Now my guest room is so versatile to accommodate my guests.”
4.1 out of 5 from 3,765 ratings: 4.1 on 3,646 Amazon ratings and 4.2 on 119 bol reviews
Questions about a twin to king converter kit
Short answers, including where it doesn't fit.
Can I convert two twin beds to king size?
Yes. Two Twin XL mattresses side by side are the size of a standard King. Bedbinder Deluxe holds them together, so they act as one bed instead of sliding apart.
What is the best twin to king converter?
Bedbinder Deluxe: three straps run under both mattresses and hold them together, where a foam strip only fills the seam. The rounded nylon buckles carry a 7-year warranty.
Can two twins make a king size bed?
Two Twin XL mattresses can: together they measure 76 by 80 inches, a standard King. Two regular Twins measure 76 by 75 inches, so a King fitted sheet fits the width but is slack at the foot.
Which sheet goes over two Twins joined into a King?
One King fitted sheet over both mattresses. Two separate Twin sheets don't work once the Twins are one bed. On an adjustable base, use a split-head King sheet.
Does a twin to king converter work on an adjustable bed?
Yes, if only the head end moves: place the Bedbinder a little lower, toward the foot. It does not work when both the head and the foot of each side move.
Will I feel the converter in the middle of the bed?
No. The straps of the Bedbinder Deluxe sit under the mattresses, not on top. There is no foam strip on the sleeping surface.
How long does it take to fit?
60 seconds. Slide the straps under both mattresses, close the buckles and pull gently tight. No tools.
What if a buckle breaks?
The Bedbinder Deluxe has a 7-year warranty on the buckles. If a buckle breaks, you get a whole new Bedbinder. Send your proof of purchase and a photo of the broken buckle. This also applies when you bought it on Amazon.
What is the best gap filler for two Twin XL mattresses?
Bedbinder Deluxe, a strap that holds the two Twin XLs together on any frame or box spring. Put one King fitted sheet on top.
How do I push two Twin XL dorm beds together into a king?
Two Twin XLs make exactly a King (76 x 80 inches). Strap them together and use King sheets.
How to make a bed bridge (DIY)?
A DIY bridge is usually a strip of foam cut to the gap, or a strap tied around both mattresses. Foam fills the gap but slips as the mattresses move, and a strap around the outside squeezes the edges. A connector made for the job holds them together from underneath.
Is there a king bed that can convert to two twin beds?
Yes: a split king, two Twin XL mattresses on two bases that can stand together or apart. With Bedbinder Deluxe the two mattresses stay together as one King, and you take it off when you need two beds again.
Doing it step by step? Follow how to make two twin beds into a king.
Your two Twins, one real King, tonight
Fitted in 60 seconds. No new mattress needed.
90 nights to try it when you order on bedbinderdeluxe.com. On Amazon, their 30-day return window applies.