Length converter
Convert Millimeters to Thousandths of an inch (mm to thou)
1 mm = 39.3701 thou. Tolerances and coating thickness, where a thou is 0.001 inch.
Millimeters to thousandths of an inch conversion table
| mm | thou |
|---|---|
| 1 mm | 39.3701 thou |
| 2 mm | 78.7402 thou |
| 5 mm | 196.85 thou |
| 10 mm | 393.701 thou |
| 20 mm | 787.402 thou |
| 50 mm | 1968.5 thou |
| 100 mm | 3937.01 thou |
How to convert millimeters to thousandths of an inch
Multiply the value in millimeters by 39.3701 to get thousandths of an inch. 1 mm equals 39.3701 thou, and 1 thou equals 0.0254 mm.
About these units
The millimeter is one thousandth of a meter and the default dimension unit on metric engineering drawings. Machined tolerances are commonly quoted in hundredths of a millimeter.
A thou (or mil) is one thousandth of an inch, written 0.001 in. Machinists quote fits, shim sizes, and coating thicknesses in thou.
Common questions
How many thousandths of an inch are in a millimeter?
1 mm equals 39.3701 thou.
How do you convert millimeters to thousandths of an inch?
Multiply the value in millimeters by 39.3701 to get thousandths of an inch. 1 mm equals 39.3701 thou, and 1 thou equals 0.0254 mm.