Inches to MM
How many mm to 1 inch? According to the internationally recognized length unit conversion standard, one inch is equal to 25.4 millimeters. Write the conversion relationship between inches and millimeters as a formula, that is, 1 inch = 25.4 mm.
This official, standardized metric conversion standard has its origins in the 1959 International Measurement and Recording Record of Weights and Measures.
