Convert Caliber to Perch
Convert calibers to perches instantly. 1 caliber = 5.050505e-5 perch — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Perch to Caliber converter for the reverse conversion.
Units explained
Caliber
In length-measurement context, a caliber is a unit equal to one hundredth of an inch (2.54×10⁻⁴ m). The same word also refers to a firearm's bore diameter; in that context the value depends on the specific cartridge.
The caliber as a length unit derives from the inch by hundredth subdivision. Standardised through the 1959 International Yard and Pound Agreement.
Calibers appear in ballistics literature (alongside the more common usage as bore diameter), historical small-arms specifications, and a few precision-engineering contexts. Often confused with the cartridge-naming caliber, which is a different concept.
Length-unit usage standardised through the 1959 International Yard and Pound Agreement; the bore-diameter usage long predates this.
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.
Caliber to Perch conversion formula
The relationship between calibers and perches:
To convert calibers to perches, multiply the value in calibers by 5.050505e-5. To reverse, multiply perches by 19800.
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 Caliber converter for the reverse direction.
Step-by-step: convert calibers to perches
- Write down the value in calibers (cl).
- Multiply that value by the factor 5.050505e-5.
- The product is the equivalent value in perches (perch).
- To reverse, multiply the perch value by 19800.
Worked examples
Example 1 — Convert 1 cl to perch:
1 × 5.050505e-5 = 5.050505e-5 perch
Example 2 — Convert 100 cl to perch:
100 × 5.050505e-5 = 0.0050505051 perch
Real-world example — Quarter-meter measurement reference
A 250,000-caliber length equals 0.25 perches — useful for comparing supply-chain spec sheets where some lengths are quoted in the smaller unit and some in the larger.
250000 cl × 5.050505e-5 = 12.6262626263 perch
Real-world example — From microscopic to macroscopic
A million calibers equals exactly one perch. This kind of conversion appears in microfluidics, where total channel length is given in perches but feature widths are in calibers.
1000000 cl × 5.050505e-5 = 50.5050505051 perch
Real-world example — Macro-scale buildup
A million calibers equals exactly one perch — the conversion that bridges microscale features and macroscale objects in microfluidic, biomedical, and semiconductor packaging design.
1000000 cl × 5.050505e-5 = 50.5050505051 perch
Caliber to Perch conversion table
Standard reference values for converting calibers to perches:
| Caliber [cl] | Perch [perch] |
|---|---|
| 0.01 | 5.050505e-7 |
| 0.1 | 5.050505e-6 |
| 1 | 5.050505e-5 |
| 2 | 0.0001010101 |
| 3 | 0.0001515152 |
| 4 | 0.0002020202 |
| 5 | 0.0002525253 |
| 10 | 0.0005050505 |
| 20 | 0.001010101 |
| 30 | 0.0015151515 |
| 40 | 0.002020202 |
| 50 | 0.0025252525 |
| 100 | 0.0050505051 |
| 500 | 0.0252525253 |
| 1000 | 0.0505050505 |
Frequently asked questions
How many perches is 1 caliber?
How do I convert calibers to perches?
How do I convert perches back to calibers?
How many perches is 100 calibers?
Popular length unit conversions
Convert Caliber to other length units
Show all Caliber conversions
Metric / SI (4 units)
Imperial / US Customary (26 units)
Sources & references
Conversion factor (1 cl = 5.050505e-5 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.