If you’ve found or inherited a three-quarter bed, you know that the mattress size is quite small, roughly 48 inches wide by 75 inches long. Three-quarter beds are great for smaller bedrooms and suitable for children, but finding a mattress may be difficult. Few of the major brands make special size mattress sets, so you’ll need to find a mattress manufacturer that still makes this size. Many independent manufacturers still make this size.
What if you want to convert the bed to a full size so the mattress and sheets and bedding are easier to find?
First use a full size bed frame for bolting on a headboard and a footboard. This frame is nice because it attaches both a headboard and a footboard. It also uses clamps, so you can adjust the frame to fit your box spring perfectly.
To accommodate the difference in size between the full and three-quarter bed, you’ll need two sets of mod adapt plates. Mod-adapt plates attach to the bed frame and bridge the gap between the 48 inch headboard and footboard and the 54 inch bed frame.
If your 3/4 bed hooks on, you’ll need another gadget that attaches to the mod-adapt plates. It turns the whole frame into a hook-on frame. You’ll need two sets of Bed Hook Adapters.