Millimeters to Feet Converter
Enter the length in millimeters below to convert it to feet.
Convert Millimeters to Feet
Enter a value in millimeters (mm) to convert to feet (ft).
Millimeters to Feet Conversion Chart (1–40 Continuous)
Continuous 1 to 40 millimeters lookup table with exact decimals and reduced nearest 1/64 fractions. Highlighted rows mark common shop and ruler values.
| Millimeters (mm) | Decimal (ft) | Fraction — Nearest 1/64 (Reduced) | Nearest 1/16 (Tape) |
|---|---|---|---|
1 mm★ Common | 0.003281 ft | 0 ft | 0 ft |
2 mm★ Common | 0.006562 ft | 0 ft | 0 ft |
3 mm★ Common | 0.009843 ft | 1/64 ft | 0 ft |
4 mm | 0.013123 ft | 1/64 ft | 0 ft |
5 mm★ Common | 0.016404 ft | 1/64 ft | 0 ft |
6 mm★ Common | 0.019685 ft | 1/64 ft | 0 ft |
7 mm | 0.022966 ft | 1/64 ft | 0 ft |
8 mm★ Common | 0.026247 ft | 1/32 ft | 0 ft |
9 mm | 0.029528 ft | 1/32 ft | 0 ft |
10 mm★ Common | 0.032808 ft | 1/32 ft | 1/16 ft |
11 mm | 0.036089 ft | 1/32 ft | 1/16 ft |
12 mm★ Common | 0.03937 ft | 3/64 ft | 1/16 ft |
How to Convert Millimeters to Feet
To convert millimeters to feet, multiply the length by the following conversion ratio: 0.0032808 feet/millimeter.
Since one millimeter is equal to 0.0032808 feet, you can use this simple formula to convert:
The length in feet is equal to the length in millimeters multiplied by 0.0032808.
For example, here's how to convert 5 millimeters to feet using the formula above.
How Many Feet Are in a Millimeter?
There are 0.0032808 feet in a millimeter, which is why we use this value in the formula above.
Our millimeter fraction and decimal calculator can convert millimeters and feet, and it automatically converts the results to US customary, imperial, and SI metric values.
Millimeters and feet are both units used to measure length. Keep reading to learn more about each unit.
How to Convert Millimeters 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 0.19685 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 millimeters (mm) into fractional inches:
- Find the decimal inches result: Convert 5 mm to inches to get 0.19685 in.
- Separate the whole inches from the decimal part: Keep the whole number 0 aside, leaving the decimal remainder 0.19685.
- Multiply the decimal part by your desired fraction denominator (16, 32, or 64) and round half up: Multiply 0.19685 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 Millimeter?
A millimeter is a metric unit of length equal to one-thousandth (1/1,000) of a meter or one-tenth (1/10) of a centimeter. By international definition, there are exactly 25.4 millimeters in one inch. [1]
The millimeter, or millimetre, is a standard SI metric unit of length. Millimeters can be abbreviated as mm; for example, 1 millimeter can be written as 1 mm.
In the metric system, "milli" is the prefix for thousandths, or 10⁻³. Millimeters are the default unit on mechanical engineering drawings and architectural blueprints worldwide.
Millimeters are commonly measured using metric steel rules, digital vernier calipers, depth gauges, and micrometers in CNC machining, 3D printing, automotive fasteners, and precision manufacturing.
What Is a Foot?
A foot is a US customary and imperial unit of length equal to 12 inches or 1/3 of a yard. Under the 1959 International Yard and Pound Agreement, one foot is legally defined as exactly 0.3048 meters (30.48 centimeters). [2]
Feet are widely used in the United States, Canada, and the United Kingdom for human height, building construction, real estate floor plans, and aviation altitude. Feet can be abbreviated as ft; for example, 1 foot can be written as 1 ft.
Feet can also be denoted using the ′ symbol, known as a prime (or a single quote ' for convenience). For example, 5 feet 10 inches is frequently written as 5′ 10″ or 5' 10".
Feet are measured using 12-inch rulers, carpenter's folding rules, 25-foot steel tape measures, and laser distance meters across residential framing, architecture, and surveying.
When converting length between millimeters (mm) and feet (ft), keep full floating-point precision (1 mm = 0.0032808 ft; 1 ft = 304.8 mm) during intermediate calculations and round only the final foot figure to match your instrument tolerance.
More Millimeter & Foot Conversions
Need to calculate in the opposite direction? Use our feet to millimeters calculator to switch your starting unit immediately. You can also explore related tools such as converting feet to millimeters, converting meters to feet, or converting inches to feet.
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Length Metrology Standard — Millimeters (mm) to Feet (ft)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Millimeter (mm) & Foot (ft)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (mm to ft)