Guides What is Three Quarters (3/4) of inch? Rory Fraser Jan 27, 2022 3/4 of an inch is a unit-less measure used to describe the distance, or height between two surfaces. One inch is equal to 2.54 centimeters (cm) and one mile is equal to 1.609 kilometers (km). 3/4 of an inch is equal to approximately 19.05…