The most common backset is 2 3 8 but 2 3 4 is also quite common usually used on exterior doors.
How to measure door hinge backset.
Then use this formula to calculate the hinge width.
The width of a door hinge when it is fully open.
The method or measuring hinge backset varies between sdi and naamm hmma.
The backset is the distance from the edge of the door to the center of the 2 1 8 inch bore hole.
This is a critical measurement and must be accurate within 1 32.
Use the overlay to determine the hinge size you need for the door.
For operating clearance the hinge backset on the door is 1 16 less smaller than the hinge backset on the frame.
If a hinge doesn t have that use a tape measure to determine the width of the mounting plate included with the hinge or cabinet.
If there is existing door hardware measure from the edge of the door to the center of the knob s backplate.
Open leaf or hinge width.
The hinge backset on the door will be properly adjusted from this measurement typical 1 16 to ensure proper clearance.
Many hinges have the overlay amount printed on them.
How to measure the hinge size.
If you dont have any hardware on your door just measure from the edge of the door to the center of the bore hole the large hole where the door knob assembly is mounted.
Door thickness backset x 2 required clearance overall hinge width if your calculation result isn t a standard hinge size go to the next size up.
The most common dimension is 5 16.
2 3 8 inches and 2 3 4 inches.
Standard backsets are either a 2 3 8 backset or 2 3 4 backset.
This process is simple and vital.
The distance from the edge of the applied hinge leaf to the frame stop.
This width is ascertained by measuring perpendicular to your hinge pin.
You can use this next chart to help determine the hinge width as well.
Pick a new hinge with the same overlay size to ensure it s a good fit for your cabinet.
Just be sure to check it with your individual application for.
In the united states there are two common backsets for residential door locks.
To determine the backset on your door measure the distance from the outer edge of the door to the center or highest point of the bore hole.