Attaching a hinge to an interior door is easy with this Letsfixit guide and the process can be applied to anything requiring a hinge. Whether the door you are installing is on a cabinet, in a doorway, or on a box, you will need to know how to attach a hinge. Several different styles of hinges are available, such as off-set and piano, but all hinges are attached in the same basic manner. The steps here use an interior door as an example and to do this job, you’ll need some help.
6 When attaching hinges to a door, use shims to hold the door in a level position while open. This will make it easier for you to attach the hinges in the correct position without also having to hold the door level.The pivot point of all hinges can cause serious injury to your fingers if they get pinched between the two leaves, so always keep your fingertips away from the pivot point and handle the hinge by the edge of the leaves.
Place your closed hinge on the edge of the door (opposite the side with the handle) with the top of the hinge lined up with the first mark. The pivot point of the hinge should stick out past the face of the door on the side the door will swing toward when open. Screw the hinge into place on the edge of the door with some wood screws and a Phillips head screwdriver. Repeat this step to attach the other two hinges. Note that when attaching the centre hinge, centre the hinge on the mark; do not line up the top of the hinge with the mark.