Why are some drill center measurements listed in inches while others are listed in millimeters?

Most American companies measure drill centers in inches while European companies measure in millimeters. 3” or 5” centers are standard in the US and 96 millimeters (approximately 3 ¾ inches) are standard in Europe.

How do I convert from inches to millimeters?

To convert millimeters to inches, divide the number of millimeters by 25.4.

To convert inches to millimeters, multiply the number of inches by 25.4.

Do hinges come in sets or are they all sold individually?

This depends on the manufacturer. Read the product description box carefully to see if the hinge you are looking at is sold individually.

How Many Hinges do I need?

You will want to have enough hinges to keep the cabinet door stable. The appropriate number of hinges is determined by the door height and weight.

• If your cabinet doors are less than 40” high and weigh less than 11 pounds, two hinges will be sufficient.
• For a cabinet door between 40” and 60” high and a weight of 12-20 pounds, use three hinges.
• Four hinges are recommended for doors 60” - 80” and 29-33 pounds.
• If your cabinet doors are 80” - 85” and weigh between 40 and 48 pounds, use five hinges.