Convert Katha to Gaj
The katha is not a fixed size — it varies by state. Across the states below, 1 katha = 40–320 gaj. Pick your state for an accurate result; it runs entirely in your browser.
Katha to Gaj by state
Because the katha differs from state to state, the table below gives the value in each state we cover. The square-foot column is the standard defining value; the metre and conversion columns are computed from it.
| State / region | 1 Katha (sq ft) | 1 Katha (m²) | 1 Katha → Gaj | 1 Gaj → Katha |
|---|---|---|---|---|
| Bihar | 1,361.25 | 126.4643 | 151.25 gaj | 0.00661157 katha |
| West Bengal (rural) | 720 | 66.89019 | 80 gaj | 0.0125 katha |
| West Bengal (Kolkata) | 360 | 33.44509 | 40 gaj | 0.025 katha |
| Assam (1 bigha = 5 katha) | 2,880 | 267.5608 | 320 gaj | 0.003125 katha |
| Jharkhand (Ranchi) | 720 | 66.89019 | 80 gaj | 0.0125 katha |
| Madhya Pradesh | 600 | 55.74182 | 66.66667 gaj | 0.015 katha |
Indian land units vary by state and even by district, and local custom can differ from the standard value. For any legal, property or financial purpose, confirm the value against your local revenue records (patwari / tehsil) before relying on it.
About katha and gaj
Katha: A katha (also spelt kattha) is the common land unit across eastern India. In most states 1 bigha = 20 katha, but in Assam 1 bigha = 5 katha, so the katha’s size varies widely by state.
Gaj: A gaj is a square yard (9 sq ft) — the everyday unit for plots and houses across North India.
Frequently asked questions
- How many gaj are in 1 katha?
- It depends on the state, because the katha is not a fixed size. In Bihar, 1 katha = 151.25 gaj. Across the states listed, the answer ranges from 40 to 320 gaj — choose your state in the converter above for an accurate result.
- Why does the katha vary by state?
- The katha is a traditional unit recorded differently in each state's revenue system, and many states use a larger "pucca" and a smaller "kachha" version. There is no single national value, so the only correct conversion is the one for your specific state or district.
- How do I convert katha to gaj?
- Pick your state above so the tool uses that state's katha value, then type the amount. For example, in Bihar, multiply katha by 151.25 to get gaj.
- Which states is the katha used in?
- This converter covers: Bihar; West Bengal (rural); West Bengal (Kolkata); Assam (1 bigha = 5 katha); Jharkhand (Ranchi); Madhya Pradesh. For legal or property transactions, always confirm the local value against your revenue records (patwari / tehsil).
Related area conversions
See all area unit conversions →
Full state-by-state size reference (bigha, biswa, katha, dhur) →
Sources
Per-state values are cross-checked against multiple references, including Wikipedia: Bigha, Wikipedia: Katha, Wikipedia: Measurement of land in Punjab and state land-record references. Where sources genuinely disagree we show the documented variants rather than a single figure.