Convert Inch to Cubit
Convert inches to cubits instantly. 1 inch = 0.0555555556 cubit — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Cubit to Inch converter for the reverse conversion.
Units explained
Inch
An inch is an Imperial and US customary unit of length defined since 1959 as exactly 25.4 millimeters (0.0254 meters). It is still the standard small unit of length in the United States, the United Kingdom (informally), and a few other countries.
The inch derives from the Roman uncia (one-twelfth of a foot) and survived through Anglo-Saxon and medieval English measurement systems. Various definitions persisted regionally until the 1959 International Yard and Pound Agreement standardized the inch globally as exactly 25.4 mm.
Inches are used in the US and UK for body height, screen sizes (TVs, monitors, phones), tire sizes, plumbing, lumber, paper sizes (US Letter is 8.5 × 11 in), and most consumer product specifications in the United States.
Anglo-Saxon origin (predating 1066); standardized to 25.4 mm exactly by the International Yard and Pound Agreement of 1959, signed by the US, UK, Canada, Australia, New Zealand, and South Africa.
Cubit
The UK cubit is an Imperial unit of length equal to 18 inches (457.2 mm). It represents the historical distance from the elbow to the tip of the middle finger.
Cubits derive from ancient body-measure traditions found in Mesopotamia, Egypt, and the eastern Mediterranean. The English customary cubit was standardised at 18 inches in medieval times.
UK cubits are rare in modern commerce but appear in historical English texts, biblical references, and historical reconstructions. Different cultures used cubits of different lengths.
Ancient origin; standardised at 18 inches in English customary practice; became exact via the 1959 International Yard and Pound Agreement.
Inch to Cubit conversion formula
The relationship between inches and cubits:
To convert inches to cubits, multiply the value in inches by 0.0555555556. To reverse, multiply cubits by 18.
How to use this converter
Type a value into the calculator. The result in cubits updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Cubit to Inch converter for the reverse direction.
Step-by-step: convert inches to cubits
- Write down the value in inches (in).
- Multiply that value by the factor 0.0555555556.
- The product is the equivalent value in cubits (cubit).
- To reverse, multiply the cubit value by 18.
Worked examples
Example 1 — Convert 1 in to cubit:
1 × 0.0555555556 = 0.0555555556 cubit
Example 2 — Convert 100 in to cubit:
100 × 0.0555555556 = 5.5555555556 cubit
Real-world example — Furniture and large objects
A 72-inch piece of furniture converts to a value in cubits that's easier to mentally compare with room dimensions. This is the typical workflow when shopping internationally and product specs use a different unit than your room measurements.
72 in × 0.0555555556 = 4 cubit
Real-world example — Children's height milestones
A 150-inch-tall child measures a value in cubits that's commonly used for theme-park ride height requirements when travelling between countries that use different measurement units.
150 in × 0.0555555556 = 8.3333333333 cubit
Real-world example — Body height conversion
You enter your height as 180 inches into an international job or visa application. The form then asks for the same value in cubits — converting between these adjacent units is one of the most-used length conversions globally.
180 in × 0.0555555556 = 10 cubit
Inch to Cubit conversion table
Standard reference values for converting inches to cubits:
| Inch [in] | Cubit [cubit] |
|---|---|
| 0.01 | 0.0005555556 |
| 0.1 | 0.0055555556 |
| 1 | 0.0555555556 |
| 2 | 0.1111111111 |
| 3 | 0.1666666667 |
| 4 | 0.2222222222 |
| 5 | 0.2777777778 |
| 10 | 0.5555555556 |
| 20 | 1.1111111111 |
| 30 | 1.6666666667 |
| 40 | 2.2222222222 |
| 50 | 2.7777777778 |
| 100 | 5.5555555556 |
| 500 | 27.7777777778 |
| 1000 | 55.5555555556 |
Frequently asked questions
How many cubits is 1 inch?
How do I convert inches to cubits?
How do I convert cubits back to inches?
How many cubits is 100 inches?
Popular length unit conversions
Convert Inch to other length units
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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 in = 0.0555555556 cubit) 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.