Length · Unit Converter

Convert Katha (Bihar) to Square Kilometer

Convert kathas to square kilometers instantly. 1 katha (bihar) = 0.00012644 square kilometer — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Kilometer to Katha (Bihar) converter for the reverse conversion.

Written by Sunith Babu L, Ph.D., Lead Engineer Reviewed by Girish V Kulkarni Ph.D.

Length category 2 min read Published June 6, 2026 Last reviewed June 6, 2026 Updated June 6, 2026

Units explained

Indian Subcontinent

Katha (Bihar)

What is a 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).

Origin of the katha (bihar)

Defined as 1/20 of the Bihar pucca bigha. Like other regional kathas, the actual size varies with the local bigha.

Where it is used

Bihar kathas appear in land records and property transactions across Bihar.

When and where it was developed

Traditional regional unit.

Metric / SI

Square Kilometer

What is a square kilometer?

A square kilometer is a metric unit of area equal to 1,000,000 m² (one million square meters), or 100 hectares. It is used for measuring large land areas, regional geography, and country-scale statistics.

Origin of the square kilometer

Derived by squaring the kilometer (1000 m). The kilo- prefix comes from the Greek 'chilioi' (thousand).

Where it is used

Square kilometers express the area of cities, districts, lakes, forests, and entire countries. India's total area is approximately 3,287,263 km². 1 km² equals 100 hectares or about 247.105 acres.

When and where it was developed

Kilometer has been part of the metric system since 1795.

Katha (Bihar) to Square Kilometer conversion formula

The relationship between kathas and square kilometers:

1 katha = 0.00012644 km²

1 km² = 7908.8895919013 katha

To convert kathas to square kilometers, multiply the value in kathas by 0.00012644. To reverse, multiply square kilometers by 7908.8895919013.

How to use this converter

Type a value into the calculator. The result in square 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 Square Kilometer to Katha (Bihar) converter for the reverse direction.

Step-by-step: convert kathas to square kilometers

Write down the value in kathas (katha).
Multiply that value by the factor 0.00012644.
The product is the equivalent value in square kilometers (km²).
To reverse, multiply the square kilometer value by 7908.8895919013.

Worked examples

Example 1 — Convert 1 katha to km²:
1 × 0.00012644 = 0.00012644 km²

Example 2 — Convert 100 katha to km²:
100 × 0.00012644 = 0.012644 km²

Katha (Bihar) to Square Kilometer conversion table

Standard reference values for converting kathas to square kilometers:

Katha (Bihar) [katha]	Square Kilometer [km²]
0.01	1.2644e-6
0.1	1.2644e-5
1	0.00012644
2	0.00025288
3	0.00037932
4	0.00050576
5	0.0006322
10	0.0012644
20	0.0025288
30	0.0037932
40	0.0050576
50	0.006322
100	0.012644
500	0.06322
1000	0.12644

Frequently asked questions

How many square kilometers is 1 katha (bihar)?

1 katha (bihar) equals 0.00012644 square kilometer.

How do I convert kathas to square kilometers?

Multiply the value in kathas by 0.00012644 to get square kilometers.

How do I convert square kilometers back to kathas?

Multiply the value in square kilometers by 7908.8895919013, or use the Square Kilometer to Katha (Bihar) converter.

How many square kilometers is 100 kathas?

100 kathas equals 0.012644 square kilometers, because 100 × 0.00012644 = 0.012644.

Popular area unit conversions

ac → ft² m² → ft² ha → ac bigha → ft² ft² → m² ac → ha guntha → ft² ct → ft² ac → m² cm² → in² m² → ac km² → mi²

Convert Katha (Bihar) to other area units

Show all Katha (Bihar) conversions

Metric / SI (5 units)

Katha (Bihar) to Square Millimeter (mm²) Katha (Bihar) to Square Centimeter (cm²) Katha (Bihar) to Square Meter (m²) Katha (Bihar) to Hectare (ha) Katha (Bihar) to Square Kilometer (km²)

Imperial / US Customary (3 units)

Katha (Bihar) to Square Inch (in²) Katha (Bihar) to Square Foot (ft²) Katha (Bihar) to Acre (ac)

Indian Subcontinent (15 units)

Katha (Bihar) to Ankanam () Katha (Bihar) to Marla (marla) Katha (Bihar) to Cent (ct) Katha (Bihar) to Decimal (Indian) () Katha (Bihar) to Katha (Bengal) (katha) Katha (Bihar) to Guntha (guntha) Katha (Bihar) to Ground (Chennai) () Katha (Bihar) to Katha (Assam) (katha) Katha (Bihar) to Kanal (kanal) Katha (Bihar) to Bigha (Kachha, North India) (bigha) Katha (Bihar) to Bigha (West Bengal) (bigha) Katha (Bihar) to Bigha (Assam) (bigha) Katha (Bihar) to Bigha (Gujarat) (bigha) Katha (Bihar) to Bigha (Rajasthan) (bigha) Katha (Bihar) to Bigha (Pucca, North India) (bigha)

Sources & references

Conversion factor (1 katha = 0.00012644 km²) 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.

Results are provided for general reference. Verify critical measurements against an authoritative standard.