You should check the diameter of the hole in the door that your current hinge sits in - these are usually 26mm, 35mm or 40mm for larger hinges. It's important to measure the hole in the door and not the hinge itself as the hinge may be slightly smaller.
In general, you'll want to use one hinge for every 30 inches of door height. For example: Use two hinges for doors up to 60 inches tall. Use three hinges if the door is between 60 and 90 inches tall.
Concealed hinges come in many versions but only two sizes, these are 26mm and 35mm. Concealed hinges are the hinges most commonly used on kitchen cabinet doors. 26mm concealed hinges are used in light units like bathroom cabinets and were oten used on budget kitchen cabinets to keep the price down.
The construction of your cabinet – most notably, the overlay of the face frame and the cabinet door – determines which cabinet hinge you need. Similarly, where your drawer slides need to be mounted dictates what type of drawer slide you need.
The Center-to-Center of any drawer pull is the distance between the center of one screw hole to the center of the other. Measuring the center-to-center of the drawer pull is key in determining what new hardware will fit and whether you'll need to drill new mounting holes or fit into existing ones.
What size of door hinge do I need? Most homes have a standard sized hinge of 3.5" x 3.5" This measurement is from the bottom edge of the hinge to the top end of the hinge, and then from the outside edge to edge when the hinge is open. Exterior doors usually have a 4" hinge on them, but not always.
Measure your door hinges from side to side & top to bottom with the leaves open. Most door hinges are the same measurement in height as they are from side to side when open.
They vary in size from 25mm up to 200mm inches. A butt door hinge is measured by its height, which usually refers to the length of the knuckle. 64mm butt door hinges are used on cabinet doors and thin standard doors. 75mm hinges are used on 35mm thick standard internal doors.
For standard 35mm thick internal doors, a suitable hinge would be 75mm x 50mm (3" x 2").
Hinges are generally spaced out equally to also keep the door straight. The top hinge is a little closer to the top, usually about 7" as it is always in tension with the forces applied.
As we mentioned above, for cabinet drawers 30 inches wide or more we would recommend a pull 5 inches or longer, OR two pulls 3 inches to 5 inches long each. This is necessary because the longer a drawer gets the more weight it can hold and the harder it may be to open.
To accurately measure existing fixing centers, open your kitchen door or drawer and measure the distance between the center of each screw. This measurement should be used when specifying your new handles.
Measure the box, not the drawer front
Start at the back of the box and measure to the front of the box without including the face of the drawer. Once you have the length, round the number down. For example, if the drawer is 20 ½ inches long you will need to purchase 20 inch drawer slides.
1/2" overlay hinges are the most common overlay of cabinet hinge. These are used in face frame cabinets where the door covers a 1/2" of the face frame all the way around the cabinet door. 1/2" overlay hinges are the most common overlay of cabinet hinge.
Line up the edge of your door with the edge of a piece of tape and apply the tape to the face frame of the cabinet (must be on the hinged side of the door). Now, open the cabinet door and measure from the edge of the tape (inside edge) to the edge of the opening of the cabinet. In this case the overlay is 1-1/4″.
The hinges should be placed so that one is 7-inches from the top of the door frame, and the other is located 11-inches from the bottom of the door-frame. If these are incorrect, you'll need to go about the aforementioned steps on cutting the mortise and preparing the door jamb for the new hinge.
Usually, hinges are installed 10 inches from the bottom of the door and 5 inches from the top. If you've decided on three hinges the third hinge can be installed in the middle of the top and bottom hinge. It is vital that the measurements are exactly the same on the door and frame to get the correct alignment.
Lightweight cabinet doors typically need two hinges, spaced about five inches from the top and bottom edges. Tall or heavy cabinet doors may need a third hinge centered between the top and bottom hinges for additional support.
Please note: Fire rated door hinges are important to achieve integrity of a fire door and should be fitted in conjunction with intumescent backing. In most cases, 3 hinges are sufficient for fire doors.
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A washered hinge is an upgraded version of the pin hinge. It works on the same principle, but incorporates small washers which are concealed discreetly in between the leaves and knuckle which make opening and closing the hinge somewhat easier. They also help increase the longevity of the hinge.