US Survey Feet to Millimeters Converter
Enter the length in us survey feet below to convert it to millimeters.
Convert US Survey Feet to Millimeters
Enter a value in us survey feet (ft (US)) to convert to millimeters (mm).
US Survey Feet to Millimeters Conversion Chart (1–40 Continuous)
Continuous 1 to 40 us survey feet lookup table with exact decimals and reduced nearest 1/64 fractions. Highlighted rows mark common shop and ruler values.
| US Survey Feet (ft (US)) | Decimal (mm) | Fraction — Nearest 1/64 (Reduced) | Nearest 1/16 (Tape) |
|---|---|---|---|
1 ft (US)★ Common | 304.80061 mm | 304 51/64 mm | 304 13/16 mm |
2 ft (US)★ Common | 609.601219 mm | 609 19/32 mm | 609 5/8 mm |
3 ft (US)★ Common | 914.401829 mm | 914 13/32 mm | 914 3/8 mm |
4 ft (US) | 1,219.202438 mm | 1219 13/64 mm | 1219 3/16 mm |
5 ft (US)★ Common | 1,524.003048 mm | 1524 mm | 1524 mm |
6 ft (US)★ Common | 1,828.803658 mm | 1828 51/64 mm | 1828 13/16 mm |
7 ft (US) | 2,133.604267 mm | 2133 39/64 mm | 2133 5/8 mm |
8 ft (US)★ Common | 2,438.404877 mm | 2438 13/32 mm | 2438 3/8 mm |
9 ft (US) | 2,743.205486 mm | 2743 13/64 mm | 2743 3/16 mm |
10 ft (US)★ Common | 3,048.006096 mm | 3048 mm | 3048 mm |
11 ft (US) | 3,352.806706 mm | 3352 13/16 mm | 3352 13/16 mm |
12 ft (US)★ Common | 3,657.607315 mm | 3657 39/64 mm | 3657 5/8 mm |
How to Convert US Survey Feet to Millimeters
To convert us survey feet to millimeters, multiply the length by the following conversion ratio: 304.8006096 millimeters/us survey foot.
Since one us survey foot is equal to 304.8006096 millimeters, you can use this simple formula to convert:
The length in millimeters is equal to the length in us survey feet multiplied by 304.8006096.
For example, here's how to convert 5 us survey feet to millimeters using the formula above.
How Many Millimeters Are in a US Survey Foot?
There are 304.8006096 millimeters in a us survey foot, which is why we use this value in the formula above.
Our us survey foot fraction and decimal calculator can convert us survey feet and millimeters, and it automatically converts the results to US customary, imperial, and SI metric values.
US Survey Feet and millimeters are both units used to measure length. Keep reading to learn more about each unit.
How to Convert US Survey Feet 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 60.00012 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 us survey feet (ft (US)) into fractional inches:
- Find the decimal inches result: Convert 5 ft (US) to inches to get 60.00012 in.
- Separate the whole inches from the decimal part: Keep the whole number 60 aside, leaving the decimal remainder 0.00012.
- Multiply the decimal part by your desired fraction denominator (16, 32, or 64) and round half up: Multiply 0.00012 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 US Survey Foot?
A us survey foot is a unit of length equal to 0.3048006 meters (m), the base unit for length. Geodetic US Survey foot defined as 1200/3937 meters (approx. 0.30480061 m). [1]
The us survey foot is classified as a US customary unit of length. US Survey Feet can be abbreviated as ft (US); for example, 1 us survey foot can be written as 1 ft (US).
When working with us survey feet (ft (US)) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, us survey feet (ft (US)) are widely used across standard length applications within US customary workflows, engineering documentation, and technical data sheets.
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. [2]
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.
When converting length between us survey feet (ft (US)) and millimeters (mm), keep full floating-point precision (1 ft (US) = 304.8006096 mm; 1 mm = 0.0032808 ft (US)) during intermediate calculations and round only the final millimeter figure to match your instrument tolerance.
More US Survey Foot & Millimeter Conversions
Need to calculate in the opposite direction? Use our millimeters to us survey feet calculator to switch your starting unit immediately. You can also explore related tools such as converting millimeters to us survey feet, converting inches to millimeters, or converting micrometers to millimeters.
Convert from US Survey Feet
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Length Metrology Standard — US Survey Feet (ft (US)) to Millimeters (mm)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: US Survey Foot (ft (US)) & Millimeter (mm)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (ft (US) to mm)