The standard bore is 2 1 8.
How to measure front door lock.
Simply measure the length and width so you can match up as best as possible for a clean finish on the edge of your door.
The front plate that sits on the edge of the door once the lock is fitted is referred to as the forend or faceplate of the lock.
Stand inside the open door facing the jamb.
This is a subjective measurement but in some cases.
Measure from the inside edge of the trim on one side to the inside edge of the trim on the other side to get your jamb width if there s trim installed or simply measure the jamb if it s unadorned.
The backset is the distance from the edge of the door to the center of the 2 1 8 inch bore hole.
Many older doors had bores that were been smaller.
How to measure for the right size door knob.
2 3 8 inches and 2 3 4 inches.
As for how to measure a door frame.
Find a door knob that fits your hand comfortably.
In the united states there are two common backsets for residential door locks.
In most cases the door set which.