pkminfotechBigha to Kattha Converter
Convert regional land measurements like Bigha, Kattha, Biswa, and Gaj to Square Feet and Acre according to state-wise standard calculations.
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The Ultimate Guide to Bigha & Kattha Conversion in Indian Real Estate
Deep Historical Analysis, State-wise Calculations, and Mathematical FormulationsIf you are buying agricultural land, checking ancestry registry maps (Khesra/Khata books), or dealing with local property transactions in Northern, Eastern, and Western India, you will immediately face traditional units like Bigha, Kattha, and Biswa. Understanding these units is challenging because a Bigha in Bihar is completely different from a Bigha in Uttar Pradesh or West Bengal.
1. The Origin of Bigha and Kattha: A Historical Legacy
The concept of Bigha dates back to pre-colonial India. In medieval times, agricultural land was assessed for taxation based on actual crop yields. During Emperor Akbar's administration, his finance minister, **Raja Todar Mal**, revolutionized land surveying by introducing a standard measurement rod called the **Jarib** (made of bamboo joined by iron rings) and the **Lagga** (measurement pole).
A Bigha was defined as the area of land that could be cultivated by a single farmer with a pair of bullocks in a day. As local administration and ruler configurations changed across different princely states, the length of the Lagga changed. Since a Bigha and its sub-divisions (Kattha, Biswa, Dhur) are direct mathematical squares of the local Lagga size, the absolute size of 1 Bigha varied between districts.
2. The Mathematics: How Local Jarib & Lagga Determine Bigha and Kattha
To understand the calculations used in states like Bihar, Jharkhand, and Uttar Pradesh, you must understand the **Lagga** (measured in cubits or *Hath*, where 1 Hath is roughly 1.5 feet or 18 inches):
- Dhur: The basic building block.
1 Dhur = (Lagga length in cubits * 1.5) ^ 2square feet. - Kattha: 1 Kattha contains exactly 20 Dhur.
1 Kattha = 20 * Dhur. - Bigha: 1 Bigha contains exactly 20 Kattha (or 400 Dhur).
1 Bigha = 20 * Kattha.
Let's run a step-by-step example for **Patna, Bihar**, where a standard **Lagga of 5.5 Hath (cubits)** is used:
Lagga Length = 5.5 Hath = 5.5 * 1.5 = 8.25 feet
1 Dhur = (8.25) ^ 2 = 68.0625 square feet
1 Kattha = 20 * 68.0625 = 1,361.25 square feet
1 Bigha = 20 * 1,361.25 = 27,225 square feet
However, in districts like Gaya or Munger, the local Lagga can be 6 Hath or 7 Hath, meaning a local Kattha there can exceed 1,600 square feet. This is why our tool provides state-standardized configurations to clear local ambiguity.
3. Regional Classification Table: How States Compare
The table below highlights the standard conversions configured under state revenue department regulations:
| State / Region | Standard Lagga | 1 Bigha in Sq Ft | 1 Bigha in Kattha/Biswa | Equivalent 1 Kattha (Sq Ft) | Acre Conversion |
|---|---|---|---|---|---|
| Bihar | 5.5 Hath | 27,225 sq ft | 20 Kattha | 1,361.25 sq ft | 0.625 Acres |
| UP (East) | 5.5 Hath | 27,225 sq ft | 20 Biswa | 1,361.25 sq ft | 0.625 Acres |
| UP (West) | 5.47 Hath | 27,000 sq ft | 20 Biswa | 1,350.00 sq ft | 0.619 Acres |
| West Bengal | 4.0 Hath | 14,400 sq ft | 20 Kattha | 720.00 sq ft | 0.330 Acres |
| Assam | 8.0 Hath | 14,400 sq ft | 5 Kattha | 2,880.00 sq ft | 0.330 Acres |
| Punjab & Haryana | N/A | 9,000 sq ft | 20 Biswa | 450.00 sq ft | 0.206 Acres |
4. Pucca Bigha vs. Kucha Bigha: What Buyers Must Know
In western parts of Uttar Pradesh, Rajasthan, and Uttarakhand, you will frequently hear the terms **Pucca Bigha** (also known as Pukka Bigha) and **Kucha Bigha** (or raw Bigha).
A Pucca Bigha is the official standard, equivalent to 27,225 square feet (or 3,025 square yards). A Kucha Bigha was a local measurement used by landlords for tenancy calculations and is standardly **exactly 1/3rd of a Pucca Bigha** (i.e. 9,075 square feet). When reading old mutation papers or inheritance registries, always confirm whether the property size is written in Kucha or Pucca Bighas to prevent overpaying for the plot.
5. Frequently Asked Questions (FAQ)
Q1: Why is Bigha to Kattha conversion not standard all over India?
Land classification in India is a state subject under the constitution. Since local governments historically used different rods (laggas) for land taxation, regional variations persisted even after the adoption of standard metric systems (hectares and square meters).
Q2: How many Kattha make one Acre in Bihar?
Since 1 Acre contains 43,560 square feet and 1 Kattha in Bihar equals 1,361.25 square feet, dividing 43,560 by 1,361.25 gives exactly **32 Kattha**. So, 1 Acre is equivalent to 32 Kattha (or 1.6 Bigha) in Bihar.
Q3: What is the relation between Bigha, Kattha, and Dhur?
The units follow a base-20 nested multiplier system: 1 Bigha = 20 Kattha, and 1 Kattha = 20 Dhur. This means 1 Bigha contains exactly 400 Dhur.
Q4: How do I convert Bigha to Square Yards (Gaj)?
First, calculate the square feet for your state. Then divide that number by 9. For example, a standard 1 Bigha in UP East is 27,225 sq ft. Dividing 27,225 by 9 gives exactly 3,025 Square Yards (or Gaj).
Q5: How many Biswa is 1 Bigha in Western Uttar Pradesh?
In UP West, 1 Bigha contains 20 Biswa. The total area of 1 Bigha is 27,000 square feet, which makes each Biswa equivalent to 1,350 square feet.