A katha (also written kattha or kottah) is a traditional land unit used in eastern India, and its size depends on the state. 1 katha is about 1,361 sq ft in Bihar and Jharkhand, 720 sq ft in West Bengal and 2,880 sq ft in Assam. Choose your state’s katha in the converter below, or use the table.
1 Katha (Bihar) = 1,361.25 Square feet (sq ft)
1 katha in square feet by state
| State | 1 katha in sq ft | 1 katha in sq m | Katha in 1 bigha |
|---|---|---|---|
| Bihar and Jharkhand | about 1,361 | 126.5 | 20 |
| West Bengal | 720 | 66.9 | 20 |
| Assam | 2,880 | 267.6 | 5 |
These are the values used most often. In parts of Bihar and Jharkhand the local katha differs from district to district, so check the khatiyan or jamabandi and ask at the circle office for your area.
Katha to square feet formula
Square feet = katha × square feet in 1 katha for your state
For example, a 2 katha plot in Patna is about 2 × 1,361.25 = 2,722.5 sq ft. A 3 katha plot in Kolkata is 3 × 720 = 2,160 sq ft.
Katha to square feet table
| Katha | Bihar / Jharkhand (sq ft) | West Bengal (sq ft) | Assam (sq ft) |
|---|---|---|---|
| 1 | 1,361.25 | 720 | 2,880 |
| 2 | 2,722.5 | 1,440 | 5,760 |
| 3 | 4,083.75 | 2,160 | 8,640 |
| 4 | 5,445 | 2,880 | 11,520 |
| 5 | 6,806.25 | 3,600 | 14,400 |
| 10 | 13,612.5 | 7,200 | 28,800 |
| 15 | 20,418.75 | 10,800 | 43,200 |
| 20 | 27,225 | 14,400 | 57,600 |
Katha and smaller units
- Bihar: 1 bigha = 20 katha; 1 katha = 20 dhur; 1 katha = about 3.125 decimal (dismil).
- West Bengal: 1 bigha = 20 katha; 1 katha = 16 chhatak; 1 chhatak = 45 sq ft.
- Assam: 1 bigha = 5 katha; 1 katha = 20 lessa; 1 lessa = 144 sq ft.
Frequently asked questions
How many square feet are in 1 katha?
It depends on the state. 1 katha is about 1,361 sq ft in Bihar and Jharkhand, 720 sq ft in West Bengal and 2,880 sq ft in Assam.
How many square feet are in 1 katha in Bihar?
1 katha in Bihar is usually taken as about 1,361 sq ft (1,361.25 sq ft), though some districts use a different local value.
How many square feet are in 1 katha in Kolkata?
1 katha (kottah) in Kolkata and West Bengal is 720 sq ft.
How many katha make 1 bigha?
20 katha make 1 bigha in Bihar, Jharkhand and West Bengal. In Assam, 5 katha make 1 bigha.
How many dismil are in 1 katha in Bihar?
1 katha in Bihar is about 3.125 dismil (decimal).
How many square feet are in 1 katha in Assam?
1 katha in Assam is 2,880 sq ft.
More tools and guides: dismil to square feet, bigha to acre, land area converter, stamp duty in India and the encumbrance certificate.
Conversions use standard values: 1 acre = 43,560 sq ft, 1 square metre = 10.7639 sq ft, 1 square yard (gaj) = 9 sq ft, 1 cent = 435.6 sq ft. Local units such as bigha, katha and biswa vary by state and sometimes by district, so confirm the local value with the land record or the tehsil office before you buy or sell land.
