Convert US Survey Foot to Yard
Convert us survey feet to yards instantly. 1 us survey foot = 0.333334 yard — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Yard to US Survey Foot converter for the reverse conversion.
Units explained
US Survey Foot
The US Survey Foot is a legacy unit of length defined as exactly 1200/3937 meters (approximately 0.3048006 m). It differs from the modern international foot by about 2 parts per million.
Established in the United States by the Mendenhall Order of 1893, which defined the foot in terms of the meter as 1200/3937 m. The US continued using this value for surveying even after the 1959 International Yard and Pound Agreement standardized the international foot at exactly 0.3048 m.
Used in US land surveying, geodetic measurements, state plane coordinate systems, and legal land descriptions. The US Survey Foot was officially deprecated by NIST and NOAA effective December 31, 2022, with the international foot becoming the sole US standard. Legacy data and recorded land surveys still reference it.
Mendenhall Order of 1893 defined the foot as 1200/3937 m; persisted in US surveying after 1959; officially deprecated by NIST/NOAA as of December 31, 2022.
Yard
A yard is an Imperial and US customary unit of length equal to 3 feet or exactly 0.9144 meters. It is used for medium distances, particularly in athletics and fabric/textile measurement.
The yard's origin is contested but traditionally attributed to the length from the tip of King Henry I's nose to the end of his outstretched thumb. It was standardized in English law from the medieval period and definitively fixed at 0.9144 m exactly by the 1959 International Yard and Pound Agreement.
Yards are used in American football (10 yards for a first down), golf course distances, fabric and carpet sales in the US, and short-distance running events. The UK uses yards informally and on road signs for short distances.
Standardized in English law from the Middle Ages; fixed at 0.9144 m exactly by the 1959 International Yard and Pound Agreement.
US Survey Foot to Yard conversion formula
Note: this conversion uses a generally accepted modern value. Historical and regional definitions of this unit varied across times and places.
The relationship between us survey feet and yards:
To convert us survey feet to yards, multiply the value in us survey feet by 0.333334. To reverse, multiply yards by 2.999994.
How to use this converter
Type a value into the calculator. The result in yards updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Yard to US Survey Foot converter for the reverse direction.
Step-by-step: convert us survey feet to yards
- Write down the value in us survey feet (sft).
- Multiply that value by the factor 0.333334.
- The product is the equivalent value in yards (yd).
- To reverse, multiply the yard value by 2.999994.
Worked examples
Example 1 — Convert 1 sft to yd:
1 × 0.333334 = 0.333334 yd
Example 2 — Convert 100 sft to yd:
100 × 0.333334 = 33.3334000001 yd
Real-world example — Reference scenario in case of fallback
Conversion between human-scale length units is the everyday workflow of architecture, athletics, and apparel design — three of the most common contexts that span metric and imperial systems.
1 sft × 0.333334 = 0.333334 yd
Real-world example — Adult height conversion
A 1.8-us survey foot-tall person measures a value in yards that converts the height to the unit favoured by American forms, schools, or driver's licences. This is daily routine for anyone living between metric and imperial systems.
1.8 sft × 0.333334 = 0.6000012 yd
Real-world example — Fabric purchase length
Two us survey feet of fabric equals a value in yards essential for tailors and textile buyers sourcing material from international suppliers that quote in different units.
2 sft × 0.333334 = 0.666668 yd
US Survey Foot to Yard conversion table
Standard reference values for converting us survey feet to yards:
| US Survey Foot [sft] | Yard [yd] |
|---|---|
| 0.01 | 0.00333334 |
| 0.1 | 0.0333334 |
| 1 | 0.333334 |
| 2 | 0.666668 |
| 3 | 1.000002 |
| 4 | 1.333336 |
| 5 | 1.66667 |
| 10 | 3.33334 |
| 20 | 6.66668 |
| 30 | 10.00002 |
| 40 | 13.3333600001 |
| 50 | 16.6667000001 |
| 100 | 33.3334000001 |
| 500 | 166.6670000007 |
| 1000 | 333.3340000013 |
Frequently asked questions
How many yards is 1 us survey foot?
How do I convert us survey feet to yards?
How do I convert yards back to us survey feet?
How many yards is 100 us survey feet?
Popular length unit conversions
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Metric / SI (7 units)
Imperial / US Customary (26 units)
Nautical (1 units)
Sources & references
Conversion factor (1 sft = 0.333334 yd) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.