Convert Yard to Perch
Convert yards to perches instantly. 1 yard = 0.1818181818 perch — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Perch to Yard converter for the reverse conversion.
Units explained
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.
Perch
A perch is an Imperial unit of length identical to the rod — 16.5 feet (about 5.03 m). The names 'rod', 'perch', and 'pole' all refer to the same surveying unit and differ only by regional preference.
Like the rod, the perch derives from medieval English land-surveying. The name 'perch' was particularly common in legal land descriptions in Ireland and parts of the UK.
Perches appear in legacy land descriptions in Ireland, the UK, and historical US documents. Modern usage is rare.
Medieval English surveying origin; identical to the rod since 1620; became exact via the 1959 International Yard and Pound Agreement.
Yard to Perch conversion formula
The relationship between yards and perches:
To convert yards to perches, multiply the value in yards by 0.1818181818. To reverse, multiply perches by 5.5.
How to use this converter
Type a value into the calculator. The result in perches updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Perch to Yard converter for the reverse direction.
Step-by-step: convert yards to perches
- Write down the value in yards (yd).
- Multiply that value by the factor 0.1818181818.
- The product is the equivalent value in perches (perch).
- To reverse, multiply the perch value by 5.5.
Worked examples
Example 1 — Convert 1 yd to perch:
1 × 0.1818181818 = 0.1818181818 perch
Example 2 — Convert 100 yd to perch:
100 × 0.1818181818 = 18.1818181818 perch
Real-world example — Fabric purchase length
Two yards of fabric equals a value in perches essential for tailors and textile buyers sourcing material from international suppliers that quote in different units.
2 yd × 0.1818181818 = 0.3636363636 perch
Real-world example — Maritime depth conversion
A 10-yard sounding depth converts cleanly into perches. Recreational divers and sailors translate between the two units whenever they read legacy charts against modern depth-sounder displays.
10 yd × 0.1818181818 = 1.8181818182 perch
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 yd × 0.1818181818 = 0.1818181818 perch
Yard to Perch conversion table
Standard reference values for converting yards to perches:
| Yard [yd] | Perch [perch] |
|---|---|
| 0.01 | 0.0018181818 |
| 0.1 | 0.0181818182 |
| 1 | 0.1818181818 |
| 2 | 0.3636363636 |
| 3 | 0.5454545455 |
| 4 | 0.7272727273 |
| 5 | 0.9090909091 |
| 10 | 1.8181818182 |
| 20 | 3.6363636364 |
| 30 | 5.4545454545 |
| 40 | 7.2727272727 |
| 50 | 9.0909090909 |
| 100 | 18.1818181818 |
| 500 | 90.9090909091 |
| 1000 | 181.8181818182 |
Frequently asked questions
How many perches is 1 yard?
How do I convert yards to perches?
How do I convert perches back to yards?
How many perches is 100 yards?
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Metric / SI (18 units)
Imperial / US Customary (26 units)
Nautical (1 units)
Astronomical (9 units)
Atomic / Physics (6 units)
Typographic (3 units)
Sources & references
Conversion factor (1 yd = 0.1818181818 perch) 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.