pkminfotechBigha to Kattha Converter
Convert Bigha, Kattha, Biswa and Gaj to sq ft or acre — with state-wise land standards.
Quick Conversion Reference (Bihar Standard)
| 1 Bigha | 1 Kattha | 1 Biswa | 1 Gaj (Sq Yard) |
|---|---|---|---|
| 20 Kattha | 1,361.25 sq ft | 1,361.25 sq ft | 9 sq ft |
The Ultimate Guide to Bigha & Kattha Conversion in Indian Real Estate
Deep historical analysis, state-wise calculations, and mathematical formulations.
If 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. During Emperor Akbar's Mughal administration, his finance minister, Raja Todar Mal, revolutionized revenue collection by introducing a standard measurement rod called the Jarib (made of bamboo joined by iron rings) and the Lagga (measurement pole).
Historically, 1 Bigha represented the area of land that could be cultivated by a single farmer with a pair of bullocks in a single day. As local administration and nawab rules evolved across different princely states, the physical length of the local Lagga varied. 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. Mathematical Formulations: How Lagga Determines Square Feet
To understand the calculations used in 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):
• Standard Lagga = 5.5 Hath = 5.5 × 1.5 = 8.25 feet
• 1 Dhur = (8.25)² = 68.0625 sq ft
• 1 Kattha = 20 Dhur = 20 × 68.0625 = 1,361.25 sq ft
• 1 Bigha = 20 Kattha = 20 × 1,361.25 = 27,225 sq ft
3. Regional Classification Table: How Indian States Compare
| State / Region | Standard Lagga | 1 Bigha (Sq Ft) | 1 Bigha in Kattha/Biswa | 1 Kattha (Sq Ft) |
|---|---|---|---|---|
| Bihar | 5.5 Hath | 27,225 sq ft | 20 Kattha | 1,361.25 sq ft |
| UP (East) | 5.5 Hath | 27,225 sq ft | 20 Biswa | 1,361.25 sq ft |
| UP (West) | 5.47 Hath | 27,000 sq ft | 20 Biswa | 1,350 sq ft |
| West Bengal | 4.0 Hath | 14,400 sq ft | 20 Kattha | 720 sq ft |
| Assam | 4.0 Hath | 14,400 sq ft | 5 Kattha | 2,880 sq ft |
| Punjab & Haryana | 3.16 Hath | 9,000 sq ft | 20 Biswa | 450 sq ft |
4. Frequently Asked Questions
Common Bigha and Kattha calculations
Land-unit sizes change by state. Select the correct region before using these common conversions.
1 Bigha in Kattha
In Bihar and West Bengal, 1 Bigha commonly equals 20 Kattha, while Assam commonly uses 5 Kattha.
Bigha to square feet
One Bigha is commonly 27,225 sq ft in Bihar, 27,000–27,225 sq ft in UP, and 14,400 sq ft in West Bengal.
Bigha to acre and Gaj
The calculator converts the selected state’s Bigha value to acre and square yards (Gaj) automatically.