Store Locator

Get Expert Advice

Return Policy

Headboard And Footboard Adapter Conversion Plates

Item #
78% of 100

These plates allow you to use a queen sized mattress with full sized head and foot boards. Great for use with antiques. Use with bolt-on frames. Package contains enough plates for one bed (set of 4 plates).

(4) Plates
More Information
Brand Rockler
Weight 1.2500
Tech Spec
  • Thickness: 3/32''
  • Width: 4-3/8''
  • Height Overall: 4-1/8''
Hardware Type Bed Rail Brackets
3.9 / 5.0
59 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
It worked out well
Glad I found worked out great!
October 31, 2019
2 months ago
Woodworking Experience:
Your Rockler product review
Took an old antique 3/4 bed and made it into a full size . Worked great and easy to do
October 20, 2019
2 months ago
Rockler conversion plate
They work perfectly on my footboard and headboard and easily enabled me to convert to a queen size matrress from a full.
September 30, 2019
3 months ago
Headboard adaptors.
Haven't installed them yet, but they seem to be what I needed for my conversion of a full-size bed into a queen size.
September 5, 2019
3 months ago
Woodworking Experience:
we have not used the plates yet; we will be setting up an antique full size head board and foot board, to accomadate a queen size bed! i feel very sure that the plates will do the job!
August 30, 2019
Just what we were looking for to up twin to full size bed
the right fix!
July 3, 2019
6 months ago
Adaptor is good but never really used I sent message at 8am in morning due to us finding a solution to cancel order.
Didn't get email back til 2.30 in the afternoon it was already shipped from your office even though it took 4 days to get to us ??
July 2, 2019
6 months ago
Woodworking Experience:
Headboard And Footboard Adapter Conversion Plates
Worked as advertised, good quality and easy to work with. Used to match up a king head boadrd for a cal king which is a litle wider than a king frame
April 18, 2019
8 months ago
Woodworking Experience:
headboard-footboard conversion plates
Perfect solution. Got new bed frame to make antique bed longer but headboard and footboard were wider than frame so couldn't bolt them on.. This did the trick. Now we still have our antique bed but it is longer and regular mattress fits with room to tuck in covers. Love it.
February 16, 2019
10 months ago
Worked perfectly!
Great item! Worked perfectly! My handy husband even stated “these things work slick”.
February 2, 2019
10 months ago
Woodworking Experience:
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 95 questions Browse 95 questions and 160 answers
Why did you choose this?
Rockler Store
To convert a Double headboard/foot board bed which has been in the family for many years into a more comfortably sized Queen.
Janet B on Nov 19, 2019
Need to convert an antique bed to a standard size double bed.
Fran B on Nov 3, 2019
To convert a Double headboard/foot board bed which has been in the family for many years into a more comfortably sized Queen.
Janet B on Nov 19, 2019
Needed them to adapt antique 3/4 bed to full. Delighted to have found them online so easily.
barbara j v on Nov 18, 2019
Need to convert an antique bed to a standard size double bed.
Fran B on Nov 3, 2019
It’s a good buy and I needed the product.
Scott R on Oct 12, 2019
what I have been searching for an antique bed
Lydia V on Oct 4, 2019
I need to convert a full size head and foot board to a queen size bed. This product looks perfect.
Joy B on Oct 2, 2019
This is just what I have been looking for to solve the problem of antique broken hardware and the cost of a new custom made 3/4 mattress.
Nancy S on Sep 9, 2019
Just bought a bed set and the legs that are soppose to hold it up don’t touch the floor and there’re not a lot of support so I’m ordering a bed frame and need the adapters to attach it to the head and foot board
Cindy B on Sep 6, 2019
I’m hoping to use these brackets to attach antique headboard and foot board to a full mattress frame.
Janet R on Aug 30, 2019
Most economical way to convert my full size bed to accommodate a queen size mattress.
Walter D on Aug 15, 2019
Perfect for need, reasonable price
Robert B on Aug 1, 2019
I was disassembling the bed rails from the headboard by myself (not recommended!) and the footboard collapsed with the rails still attached, bending the adapter plates (2). I need to replace 2 adapter plates that are now bent. Should have had a spotter. Lesson learned.
Sandy on Jul 28, 2019
I have a full bed that I need to adapt to fit a queen mattress
Sue S on Jul 21, 2019
We have an antique full size bed and we need it to be queen size
susan p on Jun 29, 2019
Converting antique full size bed to queen size.
Linda K on Jun 23, 2019
I needed this item for bed conversion from a full to a queen and this was the least expensive for a set of 4
Carolyn E on Jun 19, 2019
Hoping they work with replacement wood rails
Patricia Y on Jun 14, 2019
Converting antique 3/4 bed to accept full-sized mattress.
Mary W on Jun 4, 2019
I need to convert a full to a queen
Angela S on May 17, 2019
We are going to try and cover an antique 3/4 bed into a full
Casey L on May 3, 2019
Need to convert a full head and foot board to queen size.
Phillip T on Apr 29, 2019
Bed frame didn't line up with head board and foot board
James L on Apr 19, 2019
Visual choice
gerald s on Apr 18, 2019
Want to use an old "heirloom" headboard & footboard with new queen mattress
Ross M on Apr 9, 2019
To convert my antique bedroom set to a full-size
Sandra Jones E on Apr 5, 2019
Converting antique bed to a queen size
Edward M on Apr 4, 2019
To fit queen bed frame to full headboard. No one else had any way of doing it! Checked every store in town.
Scott M on Mar 24, 2019
Wanted to be able to use a full size bed as a queen.
Sandy on Mar 19, 2019
To continue use of older bedroom suite
Sylvia G on Mar 17, 2019
To convert my full size antique wood bed to queen size !
lisa c on Mar 6, 2019
theses adapters is an answer to prayer. I love our guest room antique bed but a standard size was too small for most of our guest so now I can keep my treasure and have a queen size bed
Genevie H on Mar 3, 2019
Need to enlarge double headboard to queen mattress size.
Eileen S on Feb 28, 2019
To convert an antique double bed to a queen.
Charles W on Feb 28, 2019
I found and bought the most beautiful antique iron bed, only to discover it was a full size, not the queen that we needed... I was on the hunt for another when someone referred me to Rockler and these conversion brackets- I am so excited that I will get to use my bed after all!
Christina M on Feb 25, 2019
I am wanting to upgrade my antique bed from a full size mattress to a queen. This will be perfect!
Kenneth B on Feb 22, 2019
I have an antique bedroom set but is only full size, was so pleased to find the adapter to make it queen .
Soundra B on Feb 21, 2019
Shabby chic project - refinishing a full size antique bed for guest room and want a queen size mattress.
Elizabeth Fletcher L on Feb 20, 2019
I am converting my antique full bed to queen
Page H on Feb 16, 2019
To secure the headboard and footboard to the bed(wood).
Vanessa B on Jan 21, 2019
To convert (we hope) an 1800 antique bed to use a queen size mattress
Charles M on Jan 21, 2019
Appears to be just what is needed to minimize the width between the existing twin headboard brackets in order to attach new headboard that lacks about an inch of reaching each side. Also your company was first to appear with a search of headboard brackets on Safari. Thanks for your products and easy shopping.
SHARON R on Jan 19, 2019
This appears to offer an ideal solution to a problem we have of matching a full size antique headboard with a queen size bed frame. Would have been terrific if the plates had hook-ons on one side and the long slots on the other. I am a little anxious about lining up and drilling new bolt holes on the headboard level to each side. But here goes. Thanks.
Ivan W on Jan 14, 2019
Converting full antique bed to queen
Amy W on Jan 6, 2019
Great product. Saved buying new rails
samuel H on Dec 30, 2018
Does what I want it to do
Kenneth R on Dec 27, 2018
I need to convert a full size bed frame to accommodate a queen size mattress.
Elena B on Dec 10, 2018
After researching available products, this product seemed like the best reviewed product for the price.
Keira B on Dec 3, 2018
cost is nice
Phyllis M on Nov 15, 2018
Converting a double bed frame to hold a queen size mattress.
Tracy Karns R on Nov 12, 2018
Have an old spindle bed antique head and footboard which needs a custom made mattress and this solves the fit problem.
Ralph D on Nov 7, 2018
Needed them to adapt antique 3/4 bed to full. Delighted to have found them online so easily.
barbara j v on Nov 18, 2019
It’s a good buy and I needed the product.
Scott R on Oct 12, 2019
I have a full wrought iron headboard that needs to be attached to a queen size bedframe. Will this extender work?
A shopper on Aug 19, 2015
Can I convert a 3/4 bed with antique headboard and footboard to full size using these?
Susie on Aug 24, 2016
BEST ANSWER: Absolutely.
will these brackets allow me to adjust Cal King mattress to King headboard and frame?
Kevin D on May 23, 2015
we installed the conversion plates to make our full frame into a queen. There is so much wobble we cannot use it. and yes the bolts are tight. How should we stablize the frame?
Gail C on Dec 23, 2017
can you use this with a queen sized headboard and a full bedframe?
Kristina J on Feb 22, 2017
With these work to convert a California King headboard and footboard to an Eastern King?
Rare E on Jul 7, 2016
BEST ANSWER: Yes - Worked just fine for me.
I have an antique bed frame that doesn't fit modern sizes. I use a full-sized mattrest and just the headboard right now. Is there something similar that would work with hooks instead of bolts?
A shopper on Apr 28, 2015
BEST ANSWER: Sorry no, we do not have any similar brackets to offer for use with hooks.
Will this product accommodate 5/16" bolts, or only 1/4" bolt?
Barb B on Aug 23, 2015
BEST ANSWER: Only 1/4 "
I'm looking for a double hook on mechanism that can be used for a full size bed and a queen size bed. Both parts have to be hook on. Any thoughts?
bobbi k on Dec 4, 2016
BEST ANSWER: Debbi, I used to work in the bedding industry, and I have also purchased the double hook-on mechanism for my daughter's bed. Let me say that there are places that sell the frames with the hooks already welded on. The Rockler people can let you know if they have such an item. If that would work with your situation, I'd recommend doing that. The adapters are very difficult to tighten and keep hooked into your headboard/footboard.
My bed has hook on wood side rails. Can I use these?
Susan M on Jul 28, 2017
BEST ANSWER: No, you will need to buy a queen size metal frame, with headboard and foot board attachment points.

Your headboard and foot board become ornamental, not structural.
Can I lower the height on a king metal bed.? ..
A shopper on May 2, 2015
BEST ANSWER: You should be able to do so, simply drill new attachment holes below the level of the present ones.
Can the conversion plates be reversed so that my queen size headboard can be attached to my full
size frame?
Kyle H on Aug 26, 2017
BEST ANSWER: Yes that's why I bought them for the same exact reason!
I am looking to use a 3/4 antique head and footboard with twin size mattresses. Will this work?
Erin R on Jul 1, 2016
BEST ANSWER: If the side rails are intended to bolt to the headboard then yes. If the side rails have tabs that fit into slots in the headboard the answer is no.
Have an old brass bed, the bolts are four inches apart. Does your brackets allow for two bolts four inches apart?
Karen F on Sep 8, 2019
BEST ANSWER: Karen, we bought these brackets to attach our full sized wood heaboard to a queen sized bed frame. We attached the frame to the shorter vertical slots. We drilled new holes into the headboard and attached to the two vertical slots. If you're handy you can drill new holes into your headboard if needed..The way I measured it fan not accommodate bolts 4 inches apart. We are very happy with these brackets. Our headboard is a heavy antique and we've had no issues. Hope this helps.
Will this adapter work to attach a full size brass headboard to a queen size bedframe w/mattress?
Nita O on Jan 30, 2017
BEST ANSWER: If your brass headboard has round legs it definitely will not work. a full size bed is 54" wide vs a queen at 60". Each bracket would need to cover an extra 3 inches. I would recommend attaching a 1"x 4" across the top of the queen frame, then fasten this to the brass headboard. Also I would make sure that your frame has 4 legs so that the weight is properly supported as well.
Can I use these brackets to attach a regular size bed to a queen size headboard?
Charles U on Apr 5, 2019
BEST ANSWER: We used these brackets on a full sized antique oak bed to expand for a queen size box spring and mattress. The bed had a footboard and side rails but in order to convert and accommodate for the queen mattress we could not use the footboard or side rails. It was a compromise we were willing to make. No one can tell that the headboard is 6inches smaller than the mattress. It went together easily and we are very satisfied.
How does these brackets make bed longer?
Elsie D on Sep 30, 2016
BEST ANSWER: The brackets make the bed wider but you have to make new side rails to make it longer
Can you use the conversion on a platform frame?
Ja bird on Nov 16, 2019
BEST ANSWER: The adapter plate is nothing more than a metal plate with slots for screws/bolts. I recall having to drill into the headboard leg area to attach the plate to that. You’d then have to have a wooden area on your platform base - in the area adjacent - to use another slot to bolt into your platform base.
Can I use this to make my queen size metal bed frame a little longer to work with my sleep number mattress?
Mary D on Nov 8, 2019
BEST ANSWER: I don't believe so. I think it can only convert width, such as full to queen. I had a portable metal bed frame that allowed me to adjust the length and I used the hardware to attach the queen headboard and footboard to the full size frame
Can I use these to attach full bed frame to queen headboard?
Mimi S on Oct 8, 2019
BEST ANSWER: Yes, but ONLY (a) if the cross-member between the headboard legs is recessed from the leg surface as it is in Rockler's photo, and (b) the bed frame has bolt holes rather than hooks. Turn the plates so that the horizontal slots are towards the middle of the headboard. Then, insert the bed frame bolts through the horizontal slots BEFORE attaching the plates to the headboard. A wrench slender enough to fit between the plates and the headboard will be necessary to keep the bolts from turning while tightening the nuts on the inside of the bed frame.
Can this product convert a 3/4 bed to a queen?
Janet H on Aug 30, 2019
BEST ANSWER: Standard queen measures 60 inches, and a standard 3/4 measures 48 inches. These brackets would only get you to the 54 inch width of a standard full mattress. However “sister pairing” two brackets per side could get you as much as 14 inches... enough to fit a 3/4 head board with a queen mattress ( with 7 inches per side overhang). Maybe worth a try. My only use was to attach a new construction head board to a purchased platform / queen and the brackets worked beautifully! Good luck.
Can this be used on queen headboard and full mattress?
Pam R on Aug 18, 2019
BEST ANSWER: I used this adapter to fit a Queen frame to a full size headboard,so I believe it should work in reverse order!
Headboard and footboard have two pegs and one bolt, will these converters work?
Rebecca G on Aug 17, 2019
BEST ANSWER: I don't think it will it take bolts and nuts to get them together
What is the vertical spacing between the horizontal slots?
Robert S on Jun 21, 2019
BEST ANSWER: Sorry Robert! Never installed them🥴
I have a wooden twin headboard with vertical slots. I need rails with hooks that fit in the slots or something that will allow me (converter?) to use no-hook iron rails. Any suggestions? Thank you!
Jan L on Jun 15, 2019
BEST ANSWER: We bought this set of converters for mounting our universal metal bed frame on to a headboard and footboard that we had. They worked great for that purpose. However, we had purchased this particular set because they were a great price but they were also too light weight. The 1st time anyone slept in the bed, the ones at the footboard bent and the footboard was always tilted instead of upright after that. I would say in theory these work great, but do spend a bit more and get a heavier plate.
Will these work for a full to queen conversion with wood side rails with hooks.?
Patricia Y on Jun 14, 2019
BEST ANSWER: You need to replace the side rails with bolt on style like in the picture and drill through the headboard and foot board and bolt them on
I need to convert a full size headboard and footboard to queen. The bed is antique and has the wooden rails with only one hook in the rail?
janice m on Jun 3, 2019
BEST ANSWER: These adapters should work fine. We had an antique headboard with a similar issue and these did the trick
I want to attach a king-size head and foot board to a king size fame ? Can I use this device
BernCe on Apr 1, 2019
BEST ANSWER: I used it to go from standard to queen. Much too light for the job. In your case I would drill headboard and footboard and use carriage bolts with a much heavier plate
I have a king headboard that I want to use on a Queen size bed frame. Will these plates work for that?
Lanita H on Mar 22, 2019
BEST ANSWER: yes, just install the plate the opposite of the diagram...i.e. the 4 horizontal cut outs facing in instead of out
Will this convert my king bed to a queen bed?
Lesley C on Mar 12, 2019
BEST ANSWER: I think it will. We converted a 3/4 bed to full size so I don’t know for certain that it will work in reverse, but it seems reasonable to me.
Prop 65 WarningWARNING: Cancer & Reproductive Harm -