How to Measure Internal Door Latch

To measure an internal door latch, you will need a measuring tape or ruler. Here are the steps to follow:

1.Determine the Backset: The backset is the distance from the edge of the door to the center of the latch. 

The most common backset measurement is 2-3/8 inches or 2-3/4 inches. 

Measure from the edge of the door to the center of the existing latch or the location where the latch will be installed.

2.Measure the Faceplate: The faceplate is the metal plate on the edge of the door that surrounds the latch.

 Measure the height and width of the faceplate to ensure compatibility with the new latch.

3.Check the Handle Opening: If your latch has a handle or knob, 

measure the diameter of the hole where the handle or knob will be inserted.

4.Consider the Strike Plate: The strike plate is the metal plate on the door frame that the latch fits into.

Measure the height and width of the strike plate if you plan to replace it as well.

By accurately measuring the backset, faceplate, handle opening, and strike plate, 

you can select the correct size latch for your internal door. 

It's always a good idea to double-check the measurements before purchasing a new latch to ensure a proper fit.