Katha to Square Feet

South Asian Cadastral Land Measurement Standards

The Katha (also spelled Kattha or Cotta) is a traditional South Asian unit of land area whose exact size varies by state land revenue codes:

Primary Regional Katha Definitions

• West Bengal & Bangladesh: 1 Katha 720 sq ft = 80 sq yards = 66.89 m^2 = 1.65 Decimals

• Bihar Standard: 1 Katha 1,361.25 sq ft = 126.46 m^2 = 3.125 Decimals

• Assam: 1 Katha 2,880 sq ft = 267.56 m^2

• Nepal: 1 Kaththa 3,645 sq ft = 338.63 m^2

• 1 Decimal / Shatak / Cent: 435.6 sq ft = (1) / (100) Acre

Equations

• Square Feet = Katha × Regional Sq Ft Factor

• Bigha = KathaKatha Per Bigha

How to Use This Calculator

Enter your Land Area to Convert (e.g. 5.0), Regional Land Standard — choose from West Bengal & Bangladesh (720 sq ft / katha), Bihar Standard (1,361.25 sq ft / katha), Assam (2,880 sq ft / katha), and Conversion Direction — choose from Katha to Square Feet (katha → sq ft), Square Feet to Katha (sq ft → katha). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

Conversion factors (to SI base unit or reference unit):

sqftPerKatha: 720.0

kathaPerBigha: 20

maximumFractionDigits: 2

Worked Example

A 5-katha residential plot in Kolkata, West Bengal measures 3,600 sq ft, providing ample space for a multi-story home.

Understanding Your Result

Unit conversion precision: round to the same number of significant figures as your original measurement. Converting 6 feet to meters gives 1.8288 m — but if your measurement was approximate (±1 inch), expressing more than 2 decimal places is false precision. For international trade and technical specifications, SI units (meters, kilograms, liters) are the standard. US customary units (feet, pounds, gallons) differ from Imperial UK units: 1 US gallon = 3.785 L vs. 1 UK gallon = 4.546 L.