Convert Katha to Decimal
The katha is not a fixed size — it varies by state. Across the states below, 1 katha = 0.8264463–6.61157 decimal. Pick your state for an accurate result; it runs entirely in your browser.
Katha to Decimal 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 → Decimal | 1 Decimal → Katha |
|---|---|---|---|---|
| Bihar | 1,361.25 | 126.4643 | 3.125 decimal | 0.32 katha |
| West Bengal (rural) | 720 | 66.89019 | 1.652893 decimal | 0.605 katha |
| West Bengal (Kolkata) | 360 | 33.44509 | 0.8264463 decimal | 1.21 katha |
| Assam (1 bigha = 5 katha) | 2,880 | 267.5608 | 6.61157 decimal | 0.15125 katha |
| Jharkhand (Ranchi) | 720 | 66.89019 | 1.652893 decimal | 0.605 katha |
| Madhya Pradesh | 600 | 55.74182 | 1.37741 decimal | 0.726 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 decimal
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.
Decimal: A decimal is 1/100 of an acre (48.4 gaj) — widely used in eastern India (Bihar, Bengal, Odisha, Jharkhand).
Frequently asked questions
- How many decimal are in 1 katha?
- It depends on the state, because the katha is not a fixed size. In Bihar, 1 katha = 3.125 decimal. Across the states listed, the answer ranges from 0.8264463 to 6.61157 decimal — 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 decimal?
- Pick your state above so the tool uses that state's katha value, then type the amount. For example, in Bihar, multiply katha by 3.125 to get decimal.
- 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 →
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.