Convert Square Inch to Katha (Bihar)
Convert square inches to kathas instantly. 1 square inch = 5.102499e-6 katha (bihar) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Katha (Bihar) to Square Inch converter for the reverse conversion.
Units explained
Square Inch
A square inch is an imperial unit of area equal to exactly 0.00064516 m², the area of a square with sides of one inch. It is widely used in the United States for small-area measurements.
Derived by squaring the inch. The inch was standardized to exactly 25.4 mm via the 1959 International Yard and Pound Agreement.
Square inches are used extensively in US engineering, manufacturing, real estate (for floor plans), and everyday small-area measurements. Engine displacement is often expressed in cubic inches but cross-sections in square inches.
Inch dates to medieval English usage; modern exact value standardized in 1959.
Katha (Bihar)
A Bihar katha is a traditional unit of land area equal to approximately 126.44 m² (1/20 of a pucca bigha in Bihar).
Defined as 1/20 of the Bihar pucca bigha. Like other regional kathas, the actual size varies with the local bigha.
Bihar kathas appear in land records and property transactions across Bihar.
Traditional regional unit.
Square Inch to Katha (Bihar) conversion formula
The relationship between square inches and kathas:
To convert square inches to kathas, multiply the value in square inches by 5.102499e-6. To reverse, multiply kathas by 195982.3919647839.
How to use this converter
Type a value into the calculator. The result in kathas updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Katha (Bihar) to Square Inch converter for the reverse direction.
Step-by-step: convert square inches to kathas
- Write down the value in square inches (in²).
- Multiply that value by the factor 5.102499e-6.
- The product is the equivalent value in kathas (katha).
- To reverse, multiply the katha (bihar) value by 195982.3919647839.
Worked examples
Example 1 — Convert 1 in² to katha:
1 × 5.102499e-6 = 5.102499e-6 katha
Example 2 — Convert 100 in² to katha:
100 × 5.102499e-6 = 0.0005102499 katha
Real-world example — Paper and film thicknesses
At the thickness of office paper (roughly 3 square inches), converting between sub-millimeter units is routine for packaging and printing buyers comparing quotes from metric and US suppliers.
3 in² × 5.102499e-6 = 1.53075e-5 katha
Real-world example — Plastic-film thickness alternates
A 150-square inch plastic film converts cleanly to kathas — useful for packaging buyers reconciling supplier datasheets across metric and US measurement systems.
150 in² × 5.102499e-6 = 0.0007653749 katha
Real-world example — Hair-width scale measurements
A 70-square inch measurement (about the diameter of a human hair) is the kind of value materials engineers regularly express in adjacent micro-scale units like kathas for direct comparison across supplier datasheets.
70 in² × 5.102499e-6 = 0.0003571749 katha
Square Inch to Katha (Bihar) conversion table
Standard reference values for converting square inches to kathas:
| Square Inch [in²] | Katha (Bihar) [katha] |
|---|---|
| 0.01 | 5.102499e-8 |
| 0.1 | 5.102499e-7 |
| 1 | 5.102499e-6 |
| 2 | 1.0205e-5 |
| 3 | 1.53075e-5 |
| 4 | 2.041e-5 |
| 5 | 2.55125e-5 |
| 10 | 5.102499e-5 |
| 20 | 0.00010205 |
| 30 | 0.000153075 |
| 40 | 0.0002041 |
| 50 | 0.000255125 |
| 100 | 0.0005102499 |
| 500 | 0.0025512496 |
| 1000 | 0.0051024992 |
Frequently asked questions
How many kathas is 1 square inch?
How do I convert square inches to kathas?
How do I convert kathas back to square inches?
How many kathas is 100 square inches?
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Metric / SI (16 units)
Imperial / US Customary (14 units)
US Survey (5 units)
Indian Subcontinent (16 units)
Other Regional (10 units)
Scientific / Physics (5 units)
Historical / Pre-metric European (6 units)
Sources & references
Conversion factor (1 in² = 5.102499e-6 katha) 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.