There are 1000000 (one million) microinches in an inch. To convert from inches to microinches, multiply the inch value by one million.
1 Inch = 1 000 000 Microinches
1 Microinch = 0.000001 Inch
Inch is an imperial and US Customary length unit. The abbreviation is "in" and also the symbol is a double prime (").
Microinch is an imperial length unit and mostly used for precise machining tolerances in engineering. The abbreviation is "µin".