How Long Is 1 Inch

One inch is exactly 2.54 centimeters, or 25.4 millimeters. It is one-twelfth of a foot. In everyday terms, it is about the width of an adult’s thumb at the top joint, and a little longer than a US quarter is wide. Quick Answer: Unit Equivalent to 1 inch Millimeters 25.4 mm Centimeters 2.54 cm Meters…