When measuring for new cabinet doors, the type of hinge you intend to use will influence the door sizes.
If you intend to use your existing hinges simply measure your existing cabinet doors and order doors of the same sizes.
If you intend to use our Blum Inserta, Clip-top hinges with 1/2-inch overlay, the door size measurements are figured as follows:
On single doors simply measure the opening size and add 1-inch to both the width and height. For instance, if the cabinet opening size is 12-inches wide and 24-inches high, the door size will be 13 x 25.
On wider cabinets with two doors, measure the width of the opening, add 1-inch, then divide by 2.
For instance, if the opening is 28 inches wide and 30 inches high, each door width would be 28 + 1 = 29 divided by 2 = 14 1/2-inches wide.
Height is figured the same as for single doors. Just add 1-inch to the opening.
Our Blum hinges have plus/minus 2 millimeters of adjustment which will allow side adjustment to have a gap of up to 1/8-inch between the butting doors.