Mils to Centimeters Converter
Enter the length in mils below to convert it to centimeters.
Convert Mils to Centimeters
Enter a value in mils (mil) to convert to centimeters (cm).
Mils to Centimeters Conversion Chart (1–40 Continuous)
Continuous 1 to 40 mils lookup table with exact decimals and reduced nearest 1/64 fractions. Highlighted rows mark common shop and ruler values.
| Mils (mil) | Decimal (cm) | Fraction — Nearest 1/64 (Reduced) | Nearest 1/16 (Tape) |
|---|---|---|---|
1 mil★ Common | 0.00254 cm | 0 cm | 0 cm |
2 mil★ Common | 0.00508 cm | 0 cm | 0 cm |
3 mil★ Common | 0.00762 cm | 0 cm | 0 cm |
4 mil | 0.01016 cm | 1/64 cm | 0 cm |
5 mil★ Common | 0.0127 cm | 1/64 cm | 0 cm |
6 mil★ Common | 0.01524 cm | 1/64 cm | 0 cm |
7 mil | 0.01778 cm | 1/64 cm | 0 cm |
8 mil★ Common | 0.02032 cm | 1/64 cm | 0 cm |
9 mil | 0.02286 cm | 1/64 cm | 0 cm |
10 mil★ Common | 0.0254 cm | 1/32 cm | 0 cm |
11 mil | 0.02794 cm | 1/32 cm | 0 cm |
12 mil★ Common | 0.03048 cm | 1/32 cm | 0 cm |
How to Convert Mils to Centimeters
To convert mils to centimeters, multiply the length by the following conversion ratio: 0.00254 centimeters/mil.
Since one mil is equal to 0.00254 centimeters, you can use this simple formula to convert:
The length in centimeters is equal to the length in mils multiplied by 0.00254.
For example, here's how to convert 5 mils to centimeters using the formula above.
How Many Centimeters Are in a Mil?
There are 0.00254 centimeters in a mil, which is why we use this value in the formula above.
Our mil fraction and decimal calculator can convert mils and centimeters, and it automatically converts the results to US customary, imperial, and SI metric values.
Mils and centimeters are both units used to measure length. Keep reading to learn more about each unit.
How to Convert Mils 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 0.005 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 mils (mil) into fractional inches:
- Find the decimal inches result: Convert 5 mil to inches to get 0.005 in.
- Separate the whole inches from the decimal part: Keep the whole number 0 aside, leaving the decimal remainder 0.005.
- Multiply the decimal part by your desired fraction denominator (16, 32, or 64) and round half up: Multiply 0.005 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 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. [1]
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.
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. [2]
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.
When converting length between mils (mil) and centimeters (cm), keep full floating-point precision (1 mil = 0.00254 cm; 1 cm = 393.7007874 mil) during intermediate calculations and round only the final centimeter figure to match your instrument tolerance.
More Mil & Centimeter Conversions
Need to calculate in the opposite direction? Use our centimeters to mils calculator to switch your starting unit immediately. You can also explore related tools such as converting centimeters to mils, converting inches to centimeters, or converting feet to centimeters.
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Length Metrology Standard — Mils (mil) to Centimeters (cm)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Mil (Thou) (mil) & Centimeter (cm)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (mil to cm)