Convert Rope to US Survey Foot
Convert ropes to us survey feet instantly. 1 rope = 19.99996 us survey foot — use the live calculator, the exact formula, a conversion table and worked examples. Also check the US Survey Foot to Rope converter for the reverse conversion.
Units explained
Rope
A rope is an Imperial unit of length equal to 20 feet (6.096 m). It was historically used in English customary measurement, particularly in masonry and some land contexts.
The rope derives from English customary practice and represents 20 feet. Less commonly used than the rod-perch-pole family.
Ropes appear in historical English construction and surveying records but are rare in modern practice. Some legacy specifications and contracts may still reference the unit.
Medieval English customary origin; standardised at 20 feet; became exact via the 1959 International Yard and Pound Agreement.
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.
Rope to US Survey Foot 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 ropes and us survey feet:
To convert ropes to us survey feet, multiply the value in ropes by 19.99996. To reverse, multiply us survey feet by 0.0500001.
How to use this converter
Type a value into the calculator. The result in us survey feet updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the US Survey Foot to Rope converter for the reverse direction.
Step-by-step: convert ropes to us survey feet
- Write down the value in ropes (rope).
- Multiply that value by the factor 19.99996.
- The product is the equivalent value in us survey feet (sft).
- To reverse, multiply the us survey foot value by 0.0500001.
Worked examples
Example 1 — Convert 1 rope to sft:
1 × 19.99996 = 19.99996 sft
Example 2 — Convert 100 rope to sft:
100 × 19.99996 = 1999.996 sft
Real-world example — Maritime depth conversion
A 10-rope sounding depth converts cleanly into us survey feet. Recreational divers and sailors translate between the two units whenever they read legacy charts against modern depth-sounder displays.
10 rope × 19.99996 = 199.9996 sft
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 rope × 19.99996 = 19.99996 sft
Real-world example — Adult height conversion
A 1.8-rope-tall person measures a value in us survey feet 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 rope × 19.99996 = 35.999928 sft
Rope to US Survey Foot conversion table
Standard reference values for converting ropes to us survey feet:
| Rope [rope] | US Survey Foot [sft] |
|---|---|
| 0.01 | 0.1999996 |
| 0.1 | 1.999996 |
| 1 | 19.99996 |
| 2 | 39.99992 |
| 3 | 59.99988 |
| 4 | 79.99984 |
| 5 | 99.9998 |
| 10 | 199.9996 |
| 20 | 399.9992 |
| 30 | 599.9988 |
| 40 | 799.9984 |
| 50 | 999.998 |
| 100 | 1999.996 |
| 500 | 9999.98 |
| 1000 | 19999.96 |
Frequently asked questions
How many us survey feet is 1 rope?
How do I convert ropes to us survey feet?
How do I convert us survey feet back to ropes?
How many us survey feet is 100 ropes?
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Imperial / US Customary (26 units)
Sources & references
Conversion factor (1 rope = 19.99996 sft) 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 Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.