Land Area Calculator
Enter length and width once and instantly convert land area into Square Feet, Decimal, Katha, Bigha, Acre and more.
Enter length & width
Land Area Conversion Table
Use these common conversions for a quick comparison of land area units.
| Land unit | Conversion |
|---|---|
| 1 Decimal / Disimil | 435.6 sq ft |
| 1 Katha (commonly used in West Bengal) | 720 sq ft |
| 1 Bigha (commonly used in West Bengal) | 14,400 sq ft = 20 Katha |
| 1 Acre | 43,560 sq ft |
| 1 Hectare | Approximately 107,639.1 sq ft |
Note: Katha and Bigha measurements can vary by region and local practice.
Land Area Conversion Formulas
Square Feet → DecimalDecimal = Square Feet ÷ 435.6
Square Feet → West Bengal KathaKatha = Square Feet ÷ 720
Square Feet → West Bengal BighaBigha = Square Feet ÷ 14,400
Bigha → KathaKatha = Bigha × 20
Acre → Square FeetSquare Feet = Acre × 43,560
Traditional land-unit values can vary by locality and reference source. This calculator uses 1 Decimal = 435.6 sq ft, 1 Katha = 720 sq ft, and 1 Bigha = 14,400 sq ft for its calculations. The West Bengal Directorate of Registration and Stamp Revenue FAQ lists commonly used relationships including 1 Katha = 720 sq ft and 1 Bigha = 14,400 sq ft, while its approximate Decimal figure differs slightly. For official land records, deeds, registration, or legal measurement, verify the applicable local or official record. West Bengal Directorate of Registration and Stamp Revenue – Land Measurement FAQ
Example Calculation
If Length = 50 ft and Width = 30 ft, Area = 50 × 30 = 1,500 sq ft.
How to Calculate Land Area
For a rectangular plot, Area = Length × Width. Measure both length and width in the same unit to get the correct result.
Irregular Land
This calculator directly calculates rectangular plots. For an irregular plot, divide the land into simpler shapes and calculate each part separately. For important property matters, use a qualified surveyor or an official land measurement.
Frequently Asked Questions
How many square feet are in 1 Katha in West Bengal?
In the commonly used West Bengal system, 1 Katha equals 720 square feet.
How many Katha are in 1 Bigha in West Bengal?
In the commonly used West Bengal system, 1 Bigha equals 20 Katha.
How many square feet are in 1 Decimal?
1 Decimal, also called Disimil, equals 435.6 square feet.
Can Katha and Bigha measurements vary by location?
Yes. Their sizes can vary by region and local practice, so check the conversion used in your location.
Can I use this calculator for official land registration?
Use it for general calculations and estimates. For registration or important property matters, rely on official records and measurements from a qualified professional.