Complete guide to traditional Bengali land measurement systems. Convert between Bigha, Katha (Cottah), Decimal, Chatak, Square Feet, and other regional units used across West Bengal.
Real-time conversion between all Bengali land units
Convert between traditional Bengali land measurement units instantly. Enter any value to see conversions.
Common West Bengal land measurement conversions:
In West Bengal: 1 Bigha = 20 Katha = 7200 Sq Ft (Kolkata standard). Regional variations may apply in rural areas.
Complete reference table for all traditional Bengali land units and their equivalents.
| Unit Name | Local Name | Equivalent in Katha | Equivalent in Square Feet | Equivalent in Square Meters |
|---|---|---|---|---|
| 1 Bigha | বিঘা | 20 Katha | 7,200 sq ft (Kolkata) / 14,400 sq ft (rural) | 668.9 sq m / 1,337.8 sq m |
| 1 Katha (Cottah) | কাঠা | 1 Katha | 360 sq ft (Kolkata) / 720 sq ft (rural) | 33.45 sq m / 66.89 sq m |
| 1 Chatak | চাতক | 1/20 Katha | 45 sq ft | 4.18 sq m |
| 1 Decimal | ডেসিমাল | 1.65 Katha (approx) | 435.6 sq ft | 40.47 sq m |
| 1 Satak | শতক | 1.65 Katha (approx) | 435.6 sq ft | 40.47 sq m |
| 1 Acre | একর | 32.23 Katha (approx) | 43,560 sq ft | 4,046.86 sq m |
| 1 Hectare | হেক্টর | 79.61 Katha (approx) | 107,639 sq ft | 10,000 sq m |
The Bigha is the largest traditional unit of land measurement in West Bengal. Its size varies between urban Kolkata (3,600-7,200 sq ft) and rural areas (up to 14,400 sq ft). Historically used for agricultural land measurement.
The most commonly used unit in West Bengal property transactions. 1 Katha equals 1/20th of a Bigha. The standard Kolkata Katha is 360 sq ft, while rural Katha is typically 720 sq ft.
A decimal-based unit where 1 Decimal equals 1/100th of an Acre (435.6 sq ft). Commonly used in official land records and property documents across West Bengal.
A smaller traditional unit where 1 Chatak equals 1/20th of a Katha (45 sq ft). Often used for smaller land parcels and garden plots.
Similar to Decimal, Satak equals 1/100th of an Acre (435.6 sq ft). The terms Decimal and Satak are often used interchangeably in West Bengal.
For property transactions in Kolkata, always confirm if the measurement follows Kolkata standard (360 sq ft per Katha) or rural standard (720 sq ft per Katha).
In Kolkata, 1 Katha equals 360 square feet. This is half the size of the rural West Bengal Katha, which is 720 square feet.
There are 16 Chatak in one Katha in West Bengal. Since 1 Chatak = 45 sq ft and 1 Katha = 720 sq ft (rural) or 360 sq ft (Kolkata), the number of Chatak remains 16 regardless of Katha size.
In West Bengal, Decimal and Satak are essentially the same unit. Both equal 1/100th of an acre or 435.6 square feet. The terms are used interchangeably in property documents.
1 Acre equals approximately 3.025 Bigha in Kolkata standard (using 7,200 sq ft per Bigha) or approximately 1.5125 Bigha in rural standard (using 14,400 sq ft per Bigha).
Official land records in West Bengal typically use Decimal or Hectare units. However, traditional units like Bigha and Katha are still commonly used in property transactions and informal measurements.
For Kolkata: Divide square feet by 360. For rural West Bengal: Divide square feet by 720. Example: 1,440 sq ft = 4 Katha in Kolkata or 2 Katha in rural areas.
Yes, Cottah is simply an alternative English spelling for Katha (কাঠা). Both terms refer to the same land measurement unit in West Bengal.