Square Feet to Katha Calculator
Convert square feet to Katha for West Bengal land measurements.
How this calculator works
Katha = Square Feet / 720.
Example
3,600 square feet / 720 = 5 Katha.
Source and unit note
West Bengal Registration Directorate lists the commonly used relationships as 1 Bigha = 20 Katha = 14,400 sq ft, 1 Katha = 16 Chatak = 720 sq ft and 1 Chatak = 45 sq ft.
For Decimal, CalcSetu uses the exact acre-based definition: 1 Decimal = 1/100 Acre = 435.6 sq ft. Some official and local references show rounded approximations, so deed or survey records should be used for legal purposes.
West Bengal Registration Directorate
Last reviewed: 27 August 2026.
Frequently asked questions
How many Katha is 720 square feet?
720 square feet equals 1 Katha in the West Bengal standard.
How many Katha is 1,440 square feet?
1,440 square feet equals 2 Katha.
Can this be used for Bihar or Assam?
No. Regional Katha values differ. This page is specifically for the West Bengal standard.