Door hinges are measured by the dimensions when the hinge is open and lying flat.
Door hinge dimensions.
A thick door of 1 3 4 inches with a width of 36 inches to 48inches requires a hinge size of 5 inches.
Three dimensions are needed to ensure the replacement hinge fits into an existing mortise.
A 3 1 2 x 3 1 2 hinge will be 3 1 2 high have a center pin and two plates that are approximately 1 1 2 wide.
When installing a 1 3 4 inches door that is 36inches wide buy a hinge size of 4 1 2inches.
What is the difference between commercial and residential door hinges.
The height of the door is used to determine how many butt hinges you need.
An easy test to determining the radius you need is to take a dime and a nickel.
Most residential doors use a 3 1 2 x 3 1 2 hinges.
With very few exceptions all standard door hinges are squares and sized in 1 2 increments ex.
A dime match a 1 4 radius hinge and a nickel match a 5 8 radius hinge.
How do i determine the size of the hinge i need.
A correctly sized replacement hinge will fit into the recess mortise created in the door jamb and on the door for the original hinge.
A new door of 1 3 8 inches thick but 32 to 36 inches wide a hinge size of 4 inches will do the trick.
Residential ball bearing hinges are typically for doors 1 1 4 1 1 2.
Step 1 open the door.
In general you ll want to use one hinge for every 30 inches of door height.
When replacing an existing door hinge finding the size is as simple as taking a quick measurement.
3 inches 3 1 2 inches 4 inches.
Use three hinges if the door is between 60 and 90 inches tall.
Some larger residential doors usually entry doors use a 4 x.
For doors between 90 inches and 120 inches use four hinges.
Use two hinges for doors up to 60 inches tall.