Katha to Square Feet Converter

About the Katha to Square Feet Converter

The katha (also spelled kattha or cottah) is a traditional unit of land measurement widely used in Bangladesh, India (particularly in Bihar, West Bengal, Assam, and Jharkhand), and Nepal. Its exact size varies significantly by region — from 720 square feet in Bangladesh and West Bengal to 2,880 square feet in Assam — making accurate conversion essential for real estate transactions and land records.

This calculator supports five regional standards, ensuring your conversion matches the local definition. Enter a value in katha and see it in square feet, square meters, square yards, acres, hectares, bigha, and cents. Alternatively, convert from square feet back to katha using your chosen standard.

Whether you are buying land in Dhaka, reviewing a Bihar land registry document, or comparing property sizes across states, the page keeps the regional definitions side by side with the converted area values. A reference table showing all five standards helps you verify which definition applies to your situation.

When This Page Helps

The katha has no single universal definition — it varies by state and even by district. Using the wrong standard can mean a 4× error in land area. This calculator lets you select the exact regional standard, preventing costly mistakes in real estate. It also converts to international units (m², acres, hectares) for cross-border comparisons.

How to Use the Inputs

1. Select conversion direction: Katha → Square Feet or Square Feet → Katha.
2. Choose the regional standard that matches your location (Bangladesh, Bihar, West Bengal, Assam, or Jharkhand).
3. Enter the land area value.
4. Adjust decimal precision if needed.
5. Use preset buttons for common katha amounts.
6. View all conversions including sq ft, m², acres, bigha, and hectares.
7. Compare katha values across all five regional standards in the comparison table.

Example Calculation

Tips & Best Practices

• Always confirm which regional standard applies — a Bihar katha is almost double a Bangladesh katha.
• In Bangladesh, 20 katha = 1 bigha = 14,400 sq ft. In Bihar, 20 katha = 1 bigha = 27,225 sq ft.
• For Indian states not listed, check the local revenue department — katha definitions can vary even within a state.
• When comparing land prices across regions, convert everything to a common unit (sq ft or m²) first.
• Land registration documents in India often list area in multiple units — cross-check all of them.
• One acre ≈ 60.5 katha (Bangladesh) or ≈ 32 katha (Bihar). Memorize the one relevant to your region.

Understanding the Katha Unit

The katha (কাঠা in Bengali, कट्ठा in Hindi) is part of the traditional South Asian land measurement hierarchy: bigha → katha → chatak → square feet. It originated centuries ago as a practical way to measure agricultural land before standardized metric systems arrived. Today, despite official metrication, the katha remains deeply embedded in property markets across Bangladesh, eastern India, and Nepal.

Regional Variations

The Bangladesh/West Bengal katha (720 sq ft) is the smallest common standard. Bihar and Jharkhand use a katha of 1,361.25 sq ft — nearly double. Assam uses an even larger katha of 2,880 sq ft. These differences mean that "5 katha" in Bangladesh is about 3,600 sq ft, while in Assam it would be 14,400 sq ft — a fourfold difference.

Practical Tips for Land Buyers

Always verify the katha standard in your specific district before making a purchase. Request the land area in both katha and square feet (or square meters) in the sale deed. Use this converter to cross-check the numbers. When comparing property prices in advertisements from different regions, convert all listings to price per square foot or square meter for a fair comparison.

Frequently Asked Questions

• How many square feet is 1 katha in Bangladesh?

  In Bangladesh and West Bengal, 1 katha equals 720 square feet. This is also 66.89 square meters or 80 square yards.

• Why does the katha vary by region?

  The katha is a pre-colonial measurement that evolved independently across South Asian regions. Different local traditions and British-era survey standardizations led to different values being codified in each state's land revenue system.

• How many katha make one bigha?

  In Bangladesh and West Bengal, 20 katha = 1 bigha. In Bihar and Jharkhand, the same 20:1 ratio applies, but since the katha itself is larger, the bigha is also larger.

• How do I convert katha to acres?

  First convert katha to square feet using the appropriate regional standard, then divide by 43,560. For Bangladesh: katha × 720 / 43,560 = acres.

• Is katha used in Nepal?

  Yes, Nepal uses the katha (and bigha/dhur) system in the Terai region with its own local standards. The calculator covers the most common South Asian definitions.

• What is a decimel compared to a katha?

  A decimel (or shotangsho) is 1/100 of an acre = 435.6 sq ft. In Bangladesh, 1 katha = 720 sq ft ≈ 1.653 decimel.