Millimeters to thou
Type a value in mm to get it in thou instantly.
3,937.008thou
That's 1.17× as long as a credit card, while a smartphone is 1.5× longer. Walking, you would cover that in 71.43 milliseconds.
Convert the other way: thou to mm
What it means
How long is that?
Reference lengths are typical values. The inch, foot, yard and mile are defined exactly in meters (1 inch = 2.54 cm).
The math
How to convert mm to thou
To convert millimeters to thou, multiply by 39.3701.
Example: 100 mm × 39.3701 = 3,937.01 thou.
In the other direction, 1 thou = 0.0254 mm.
Every unit
Your length in every unit
Tables
mm to thou conversion table
| mm | thou |
|---|---|
| 1 mm | 39.3701 thou |
| 2 mm | 78.7402 thou |
| 3 mm | 118.11 thou |
| 5 mm | 196.85 thou |
| 10 mm | 393.701 thou |
| 15 mm | 590.551 thou |
| 20 mm | 787.402 thou |
| 25 mm | 984.252 thou |
| 30 mm | 1,181.1 thou |
| 50 mm | 1,968.5 thou |
| 75 mm | 2,952.76 thou |
| 100 mm | 3,937.01 thou |
| 150 mm | 5,905.51 thou |
| 200 mm | 7,874.02 thou |
| 500 mm | 19,685 thou |
| 1,000 mm | 39,370.1 thou |
thou to mm conversion table
| thou | mm |
|---|---|
| 1 thou | 0.0254 mm |
| 2 thou | 0.0508 mm |
| 3 thou | 0.0762 mm |
| 5 thou | 0.127 mm |
| 10 thou | 0.254 mm |
| 15 thou | 0.381 mm |
| 20 thou | 0.508 mm |
| 25 thou | 0.635 mm |
| 30 thou | 0.762 mm |
| 50 thou | 1.27 mm |
| 75 thou | 1.905 mm |
| 100 thou | 2.54 mm |
| 150 thou | 3.81 mm |
| 200 thou | 5.08 mm |
| 500 thou | 12.7 mm |
| 1,000 thou | 25.4 mm |
Quick answers
Quick answers
- How many thou is 1 mm?
- 1 mm is 39.3701 thou.
- How many thou is 10 mm?
- 10 mm is 393.701 thou.
- How many thou is 100 mm?
- 100 mm is 3,937.01 thou.
The units
About these units
Millimeters (mm)
A millimeter is a thousandth of a meter, roughly the thickness of a credit card. It is the everyday unit of engineering drawings and rainfall.
Thou (thou)
A thousandth of an inch, the machinist’s unit. Also called a mil.
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