Convert Perch to Kilometer
Convert perches to kilometers instantly. 1 perch = 0.0050292 kilometer — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Kilometer to Perch converter for the reverse conversion.
Units explained
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.
Kilometer
A kilometer is a metric unit of length equal to one thousand meters. It is the standard unit for measuring road distances, geographic distances, and other large-scale measurements in metric countries.
The kilometer was defined alongside the meter in 1795 using the standard SI prefix kilo- (from Greek chilioi, "thousand"), denoting one thousand units.
Kilometers are used worldwide (except the United States and a few others) for road signage, geographic distance, athletic events, and scientific distances at planetary scale. Speed limits in most countries are given in km/h.
Adopted 1795 in France as part of the original metric system; the kilometer became the global standard for road and geographic distance through the 19th and 20th century metric adoption.
Perch to Kilometer conversion formula
The relationship between perches and kilometers:
To convert perches to kilometers, multiply the value in perches by 0.0050292. To reverse, multiply kilometers by 198.8387815159.
How to use this converter
Type a value into the calculator. The result in kilometers updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Kilometer to Perch converter for the reverse direction.
Step-by-step: convert perches to kilometers
- Write down the value in perches (perch).
- Multiply that value by the factor 0.0050292.
- The product is the equivalent value in kilometers (km).
- To reverse, multiply the kilometer value by 198.8387815159.
Worked examples
Example 1 — Convert 1 perch to km:
1 × 0.0050292 = 0.0050292 km
Example 2 — Convert 100 perch to km:
100 × 0.0050292 = 0.50292 km
Real-world example — Imperial yard-to-mile scale
1,760 perches equals exactly one kilometer. American athletes and surveyors use this conversion to translate distances quoted in the smaller imperial unit into recognizable fractions of the larger geographic one.
1760 perch × 0.0050292 = 8.851392 km
Real-world example — Metric distance scale-up
One thousand perches equals one kilometer — the running distance for a 1K race or the standard metric kilometre-scale step. The simple thousand-fold conversion is the most-used metric distance translation.
1000 perch × 0.0050292 = 5.0292 km
Real-world example — Imperial mile arithmetic
5,280 perches equals exactly one kilometer. American hikers tracking elevation gain in the smaller unit but trail length in the larger one use this constant every time they read a topographic map.
5280 perch × 0.0050292 = 26.554176 km
Perch to Kilometer conversion table
Standard reference values for converting perches to kilometers:
| Perch [perch] | Kilometer [km] |
|---|---|
| 0.01 | 5.0292e-5 |
| 0.1 | 0.00050292 |
| 1 | 0.0050292 |
| 2 | 0.0100584 |
| 3 | 0.0150876 |
| 4 | 0.0201168 |
| 5 | 0.025146 |
| 10 | 0.050292 |
| 20 | 0.100584 |
| 30 | 0.150876 |
| 40 | 0.201168 |
| 50 | 0.25146 |
| 100 | 0.50292 |
| 500 | 2.5146 |
| 1000 | 5.0292 |
Frequently asked questions
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Popular length unit conversions
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Metric / SI (4 units)
Imperial / US Customary (26 units)
Sources & references
Conversion factor (1 perch = 0.0050292 km) 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.