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East India Land Tool

Bigha to Katha Calculator

Quickly find out how many Katha make 1 Bigha. State specific accurate conversions for Bihar, Assam, Bengal, and Jharkhand.

1 Bigha in Bihar and Bengal is equal to

20 Katha

Formula: Multiply your Bigha value by 20.

Standard Conversion Charts

Quick reference tables for different states in India.

Bihar, Bengal, UP & Jharkhand

Rule: 1 Bigha equals 20 Katha

1 Bigha 20 Katha
2 Bigha 40 Katha
5 Bigha 100 Katha
10 Bigha 200 Katha

Assam Region Only

Rule: 1 Bigha equals 5 Katha

1 Bigha 5 Katha
2 Bigha 10 Katha
5 Bigha 25 Katha
10 Bigha 50 Katha

Why Katha is Different Across Eastern India

At JameenCalculator.in, we know that if you are buying land or agricultural fields in Eastern India, you will definitely hear the words Bigha and Katha. Most property brokers deal exclusively in these local units instead of standard square feet or acres.

The biggest mistake buyers make is assuming that a Bigha has the same number of Katha everywhere. While researching land records, we found that the conversion depends entirely on which state you are standing in. It is not a single nationwide rule.

The Two Main Conversion Rules

To keep things simple and safe during your property registration, you just need to remember these two rules:

  • The Standard Rule: In almost all regions including Bihar, West Bengal, Uttar Pradesh, and Jharkhand, a single Bigha is always divided into exactly 20 Katha. So, to convert Bigha to Katha here, simply multiply your value by 20.
  • The Assam Exception: If you are dealing with land in Assam or certain other northeastern areas, the system changes completely. In Assam, 1 Bigha is equal to only 5 Katha. Here, you must multiply your Bigha value by 5.

How to Use This Converter Tool

We built this calculator to save you from mental math errors. Whether your broker quotes 3.5 Bigha or your Khatian document says 45 Katha, just select your region from the drop down menu above. The tool automatically applies the correct state formula and gives you the exact answer instantly. This ensures you never pay extra for land that does not exist on paper.

Frequently Asked Questions

1. 1 Bigha is equal to how many Katha in Bihar?

In Bihar, 1 Bigha is exactly equal to 20 Katha. This is the standard measurement used across almost all districts of the state for agricultural land.

2. How to convert bigha to katha?

To convert bigha to katha, you simply multiply your bigha value by the local standard. Multiply by 20 if you are in Bihar or Bengal, and multiply by 5 if you are in Assam.

3. 1 Bigha to katha in Assam - what is the exact value?

In Assam, the measurement system is quite different from the rest of India. Here, 1 Bigha is equal to exactly 5 Katha.

4. How many katha make 1 bigha in West Bengal?

Similar to Bihar and Jharkhand, 1 Bigha in West Bengal consists of exactly 20 Katha. It is widely used for both residential and farmland deals.

5. How to convert katha to bigha?

To reverse the calculation and convert katha to bigha, you just need to divide your total katha value by 20 for standard states, or divide by 5 if you are calculating for Assam.