Millimeters (mm)	Mils (mil)
1 mm	39.3701 mil
2 mm	78.7402 mil
5 mm	196.8504 mil
10 mm	393.7008 mil
25 mm	984.252 mil
50 mm	1968.5 mil
100 mm	3937.01 mil
250 mm	9842.52 mil
500 mm	19685.04 mil
1000 mm	39370.08 mil

Convert Millimeters to Mils

Convert millimeters to mils (mm to mil) with our instant calculator. 1 mm = 39.370079 mil. Includes exact formula and reference tables.

How to Convert Millimeters to Mils (mm to mil)

1 Millimeter (mm) is equal to 39.370079 Mils (mil). Multiply the millimeter value by 39.37007874

Quick Answer 1 mm = 39.370079 mil

Formula mil = mm × 39.37007874

Inverse Factor 1 mil = 0.0254 mm

Unit Definitions & Metrology Context

The standard SI base unit of length is the meter (m), defined as the distance traveled by light in a vacuum in 1/299,792,458 of a second.

About Millimeters (mm): Millimeter (mm) is a unit in the Length & Distance measurement category. It is a standard everyday unit of length & distance measurement. Relative to the length & distance base unit, 1 mm equals 0.001 Meters (m).

About Mils (mil): Mil (Thou) (mil) is a unit in the Length & Distance measurement category. It is widely used in 0.001 in (pcb traces, sheet metal, paint). Relative to the length & distance base unit, 1 mil equals 0.000025 Meters (m).

Need to convert in the opposite direction? Visit our Convert Mils to Millimeters (mil to mm) calculator (1 mil = 0.0254 mm).

Step-by-Step Worked Examples (mm to mil)

Convert 5 Millimeters to Mils: Applying the formula (mil = mm × 39.37007874): starting with 5 mm, multiply the millimeter value by 39.37007874 to get 196.8504 mil.
Convert 10 Millimeters to Mils: Applying the formula (mil = mm × 39.37007874): starting with 10 mm, multiply the millimeter value by 39.37007874 to get 393.7008 mil.
Convert 50 Millimeters to Mils: Applying the formula (mil = mm × 39.37007874): starting with 50 mm, multiply the millimeter value by 39.37007874 to get 1968.5039 mil.

Popular Length & Distance Conversions

Kilometer ⇄ Mile

Multiply kilometers by ~0.621371 to get miles, or divide miles by 0.621371 to get kilometers.

Inch ⇄ Centimeter

1 inch is legally and scientifically defined as exactly 2.54 centimeters.

Foot ⇄ Meter

1 foot is defined as exactly 0.3048 meters (12 inches).

Mile ⇄ Nautical Mile

1 nautical mile is exactly 1,852 meters (~1.15078 statute miles).

Frequently Asked Questions

Verified answers and formulas for converting millimeters to mils.

How many mils are in 1 millimeter?

There are 39.370079 mils (mil) in 1 millimeter (mm). Conversely, 1 mil (thou) equals 0.0254 millimeters.

How do you convert millimeters to mils?

To convert millimeters (mm) to mils (mil), use the formula: mil = mm × 39.37007874. Multiply the millimeter value by 39.37007874. For example, 10 mm equals 393.7008 mil.

How do I convert back from mils to millimeters?

To convert in the reverse direction from mils (mil) to millimeters (mm), use the inverse formula: mm = mil × 0.0254. Multiply the mil (thou) value by 0.0254 (1 mil = 0.0254 mm).

What is the difference between millimeter (mm) and mil (thou) (mil)?

Both millimeter and mil (thou) measure length & distance. Millimeter (mm) is a unit in the Length & Distance measurement category. It is a standard everyday unit of length & distance measurement. Relative to the length & distance base unit, 1 mm equals 0.001 Meters (m). Mil (Thou) (mil) is a unit in the Length & Distance measurement category. It is widely used in 0.001 in (pcb traces, sheet metal, paint). Relative to the length & distance base unit, 1 mil equals 0.000025 Meters (m).

How many miles are in a kilometer?

There are approximately 0.621371 miles in 1 kilometer. To convert kilometers to miles quickly in your head, multiply by 6 and divide by 10 (or multiply by 0.6).