Convert Centiinch to Barleycorn
Convert centiinches to barleycorns instantly. 1 centiinch = 0.0299999999 barleycorn — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Barleycorn to Centiinch converter for the reverse conversion.
Units explained
Centiinch
A centiinch is an Imperial unit of length equal to one hundredth of an inch (2.54×10⁻⁴ m). It is functionally identical to the caliber as a length unit but appears in different industrial contexts.
Derived from the inch via the metric-style prefix centi- (Latin centum, hundred). Standardised through the 1959 International Yard and Pound Agreement.
Centiinches occasionally appear in older engineering specifications and US-localised metric-pseudo notation. Most contemporary use prefers thousandths (mils) for sub-inch precision.
Standardised through the 1959 International Yard and Pound Agreement; rarely used in modern practice.
Barleycorn
A barleycorn is an Imperial unit of length equal to one third of an inch (about 8.47 mm). It is the basis of UK shoe sizing and is one of the oldest English length units still in use.
The barleycorn derives from the average length of a grain of barley as a natural reference. Standardised at exactly 1/3 inch by the Statute of Edward II in 1324, which used three barleycorns to define an inch.
Barleycorns are the foundation of UK and US children's shoe sizing — each whole size differs by one barleycorn. Also occasionally referenced in horse-handling and historical English literature.
Standardised in 1324 by the Statute of Edward II at 1/3 inch; the value became exact in 1959 when the inch was fixed at 25.4 mm.
Centiinch to Barleycorn conversion formula
The relationship between centiinches and barleycorns:
To convert centiinches to barleycorns, multiply the value in centiinches by 0.0299999999. To reverse, multiply barleycorns by 33.3333334646.
How to use this converter
Type a value into the calculator. The result in barleycorns updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Barleycorn to Centiinch converter for the reverse direction.
Step-by-step: convert centiinches to barleycorns
- Write down the value in centiinches (cin).
- Multiply that value by the factor 0.0299999999.
- The product is the equivalent value in barleycorns (barleycorn).
- To reverse, multiply the barleycorn value by 33.3333334646.
Worked examples
Example 1 — Convert 1 cin to barleycorn:
1 × 0.0299999999 = 0.0299999999 barleycorn
Example 2 — Convert 100 cin to barleycorn:
100 × 0.0299999999 = 2.9999999882 barleycorn
Real-world example — Packaging gauge
A 4-centiinch plastic bag thickness is a common spec for grocery and freezer bags. Converting from centiinches to barleycorns is what packaging buyers do whenever they bridge US and metric supplier quotes.
4 cin × 0.0299999999 = 0.1199999995 barleycorn
Real-world example — Plastic film and laminate thickness
A 500-centiinch sheet is a typical spec for ID-card laminates and film overlays. Converting to barleycorns aligns the value with the unit most CAD systems and material datasheets prefer.
500 cin × 0.0299999999 = 14.9999999409 barleycorn
Centiinch to Barleycorn conversion table
Standard reference values for converting centiinches to barleycorns:
| Centiinch [cin] | Barleycorn [barleycorn] |
|---|---|
| 0.01 | 0.0003 |
| 0.1 | 0.003 |
| 1 | 0.0299999999 |
| 2 | 0.0599999998 |
| 3 | 0.0899999996 |
| 4 | 0.1199999995 |
| 5 | 0.1499999994 |
| 10 | 0.2999999988 |
| 20 | 0.5999999976 |
| 30 | 0.8999999965 |
| 40 | 1.1999999953 |
| 50 | 1.4999999941 |
| 100 | 2.9999999882 |
| 500 | 14.9999999409 |
| 1000 | 29.9999998819 |
Frequently asked questions
How many barleycorns is 1 centiinch?
How do I convert centiinches to barleycorns?
How do I convert barleycorns back to centiinches?
How many barleycorns is 100 centiinches?
Popular length unit conversions
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Metric / SI (4 units)
Imperial / US Customary (26 units)
Sources & references
Conversion factor (1 cin = 0.0299999999 barleycorn) 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.