Centimeters to Mils Converter
Enter the length in centimeters below to convert it to mils.
Convert Centimeters to Mils
Enter a value in centimeters (cm) to convert to mils (mil).
Centimeters to Mils Conversion Chart (1–40 Continuous)
Continuous 1 to 40 centimeters lookup table with exact decimals and reduced nearest 1/64 fractions. Highlighted rows mark common shop and ruler values.
| Centimeters (cm) | Decimal (mil) | Fraction — Nearest 1/64 (Reduced) | Nearest 1/16 (Tape) |
|---|---|---|---|
1 cm★ Common | 393.700787 mil | 393 45/64 mil | 393 11/16 mil |
2 cm★ Common | 787.401575 mil | 787 13/32 mil | 787 3/8 mil |
3 cm★ Common | 1,181.102362 mil | 1181 7/64 mil | 1181 1/8 mil |
4 cm | 1,574.80315 mil | 1574 51/64 mil | 1574 13/16 mil |
5 cm★ Common | 1,968.503937 mil | 1968 1/2 mil | 1968 1/2 mil |
6 cm★ Common | 2,362.204724 mil | 2362 13/64 mil | 2362 3/16 mil |
7 cm | 2,755.905512 mil | 2755 29/32 mil | 2755 7/8 mil |
8 cm★ Common | 3,149.606299 mil | 3149 39/64 mil | 3149 5/8 mil |
9 cm | 3,543.307087 mil | 3543 5/16 mil | 3543 5/16 mil |
10 cm★ Common | 3,937.007874 mil | 3937 1/64 mil | 3937 mil |
11 cm | 4,330.708661 mil | 4330 45/64 mil | 4330 11/16 mil |
12 cm★ Common | 4,724.409449 mil | 4724 13/32 mil | 4724 7/16 mil |
How to Convert Centimeters to Mils
To convert centimeters to mils, multiply the length by the following conversion ratio: 393.7007874 mils/centimeter.
Since one centimeter is equal to 393.7007874 mils, you can use this simple formula to convert:
The length in mils is equal to the length in centimeters multiplied by 393.7007874.
For example, here's how to convert 5 centimeters to mils using the formula above.
How Many Mils Are in a Centimeter?
There are 393.7007874 mils in a centimeter, which is why we use this value in the formula above.
Our centimeter fraction and decimal calculator can convert centimeters and mils, and it automatically converts the results to US customary, imperial, and SI metric values.
Centimeters and mils are both units used to measure length. Keep reading to learn more about each unit.
How to Convert Centimeters to Fractional Inches (1/16″, 1/32″ & 1/64″)
Plain-language method for turning decimal inches into a standard tape-measure or machinist ruler fraction
Calculators give you a decimal number (such as 1.968504 in), but tape measures and woodworking rulers are marked in binary fractions of an inch—most commonly 1/16″ on carpenter tapes, 1/32″ on fine woodworking rules, and 1/64″ on machinist scales.
Here is the step-by-step worked example for converting 5 centimeters (cm) into fractional inches:
- Find the decimal inches result: Convert 5 cm to inches to get 1.968504 in.
- Separate the whole inches from the decimal part: Keep the whole number 1 aside, leaving the decimal remainder 0.968504.
- Multiply the decimal part by your desired fraction denominator (16, 32, or 64) and round half up: Multiply 0.968504 by 16, 32, or 64, then round to the nearest whole number (values ending in .5 round up).
- Reduce the fraction to lowest terms: If the rounded top number (numerator) is even, divide both top and bottom by 2 (or their Greatest Common Divisor) until the top number is odd, then combine with your whole inches.
What Is a Centimeter?
A centimeter is a metric unit of length equal to one-hundredth (1/100) of a meter, which is the International System of Units (SI) base unit of length. One centimeter is also equal to 10 millimeters or approximately 0.39370079 inches. [1]
The centimeter, or centimetre, is part of the SI metric system used worldwide for everyday, scientific, and clinical measurements. Centimeters can be abbreviated as cm; for example, 1 centimeter can be written as 1 cm.
In the metric system, "centi" is the Latin-derived prefix for hundredths, or 10⁻². Because 1 international inch is legally defined as 2.54 centimeters, converting between centimeters and inches is anchored by an exact mathematical constant.
Centimeters are measured using metric rulers, tailor's measuring tapes, stadiometers (for human height), and vernier calipers across carpentry, apparel sizing, school science, and medical charts.
What Is a Mil?
A mil is a unit of length equal to 0.0000254 meters (m), the base unit for length. One thousandth of an inch (0.001 in = 0.0254 mm), used in manufacturing tolerances and film thickness. [2]
The mil is classified as a US customary and imperial unit of length. Mils can be abbreviated as mil; for example, 1 mil can be written as 1 mil.
When working with mils (mil) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, mils (mil) are widely used across fine-tolerance laboratory, analytical, and micro-scale length measurements within US customary and imperial workflows, engineering documentation, and technical data sheets.
When converting length between centimeters (cm) and mils (mil), keep full floating-point precision (1 cm = 393.7007874 mil; 1 mil = 0.00254 cm) during intermediate calculations and round only the final mil figure to match your instrument tolerance.
More Centimeter & Mil Conversions
Need to calculate in the opposite direction? Use our mils to centimeters calculator to switch your starting unit immediately. You can also explore related tools such as converting mils to centimeters, converting millimeters to mils, or converting centimeters to inches.
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Length Metrology Standard — Centimeters (cm) to Mils (mil)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Centimeter (cm) & Mil (Thou) (mil)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (cm to mil)