The bigha or beegah (Persian: بیگھا, Hindi: बीघा) is a traditional unit of measurement of area of a land, commonly used in northern & eastern India, Bangladesh and Nepal.
Its sub-unit is Biswa or Katha in many regions, but it has no "standard" size.
The bigha is a traditional unit of land in several parts of North & East India.
However, in Maharashtra and Tamil Nadu, Bigha is not in practical measurement unit.
Hence each Katha is 2,880 square feet (268 m2) in area, although this may vary within different regions of Assam.
In Uttar Pradesh, one bigha can mean different things to people in different districts of the state.
In other words, 3 bigha are just 0.5 Katha or 360 sq ft short of 1 acre.
A Bigha is a customary unit of measurement in Nepal, equal to about 6,773 square meters.
Metric system (SI unit of square metre) is very seldom used officially in measuring area of land.
Measurement of area in terms of bigha [Note: Kanwa is largely obsolete and is used only when tiny lands are very precious].