Katha sizes by region
| Region | m² | sq ft | acres | hectares |
|---|---|---|---|---|
| West Bengaldefault | 66.8902 | 720 | 0.0165289 | 0.00668902 |
| Bangladesh | 66.8902 | 720 | 0.0165289 | 0.00668902 |
| Assam | 267.5608 | 2,880 | 0.0661157 | 0.0267561 |
| Bihar (common standard) | 126.4643 | 1,361.25 | 0.03125 | 0.0126464 |
| Nepal (Terai) | 338.6316 | 3,645 | 0.0836777 | 0.0338632 |
- West Bengal: = 1/20 bigha = 80 sq yd = 720 sq ft
- Bangladesh: = 1/20 bigha = 720 sq ft ≈ 1.65 decimal
- Assam: = 1/5 bigha = 20 lessa = 2,880 sq ft
- Bihar (common standard): = 1/20 of a 3,025 sq yd bigha = 1,361.25 sq ft = 20 dhur
- Nepal (Terai): = 20 dhur = 1/20 bigha = 3,645 sq ft ≈ 338.63 m²
About the katha
In West Bengal and Bangladesh the katha is the everyday unit for house plots. It is one twentieth of the 14,400 sq ft Bengal bigha, so one katha is 720 sq ft (80 sq yd, about 66.89 m²), and 60.5 katha make an acre.
Assam uses the same bigha but divides it into only 5 katha, so an Assam katha is four times larger: 2,880 sq ft, split into 20 lessa. In Bihar the katha is a twentieth of the bigha and is commonly 1,361.25 sq ft on the 3,025 sq yd bigha, but district values differ; Wikipedia, for example, cites 1,901 sq ft for Muzaffarpur and 3,267 sq ft for West Champaran.
Nepal’s kattha, used with the Terai bigha, is 3,645 sq ft (about 338.63 m²) and holds 20 dhur. Because the katha varies so much, always read it together with the place named in the deed, and treat the land record or local land office as the final word.
Related measures
- 20 katha = 1 bigha (West Bengal, Bangladesh, Bihar, Nepal); 5 katha = 1 bigha in Assam
- 1 katha = 20 lessa (Assam); 1 kattha = 20 dhur (Bihar, Nepal)
- 1 katha of 720 sq ft ≈ 1.65 decimal; 60.5 such katha = 1 acre
Quick table
Using the West Bengal value.
| Katha | Square feet | Square meters | Acres |
|---|---|---|---|
| 1 | 720 | 66.8902 | 0.0165289 |
| 2 | 1,440 | 133.7804 | 0.0330579 |
| 5 | 3,600 | 334.4509 | 0.0826446 |
| 10 | 7,200 | 668.9019 | 0.165289 |
| 20 | 14,400 | 1,337.8 | 0.330579 |
| 50 | 36,000 | 3,344.51 | 0.826446 |
| 100 | 72,000 | 6,689.02 | 1.6529 |
Sources
- Russ Rowlett, How Many? A Dictionary of Units of Measurement (UNC Chapel Hill), “kattha” (West Bengal; Bangladesh)
- Wikipedia: Bigha (regional sections and their references) (Assam; Bihar (common standard))
- Government of Nepal, Department of Land Management and Records: land unit conversion table (Nepal (Terai))
Spotted a value that’s wrong for your area, or a regional value we should add? Email support@landmeasure.app with a source.