Convert Bigha to Katha
Both the bigha and the katha are state-variable land units, so the conversion changes by state — 1 bigha = 5–20 katha across the states below. Pick your state for an accurate result; it runs entirely in your browser.
Bigha to Katha by state
Both bigha and katha are recorded in each state's revenue system, so the only correct conversion is the one for a state where both are defined. The square-foot columns are the standard defining values; the metre and conversion columns are computed from them.
| State / region | 1 Bigha (sq ft) | 1 Katha (sq ft) | 1 Bigha → Katha | 1 Katha → Bigha |
|---|---|---|---|---|
| Bihar | 27,225 | 1,361.25 | 20 katha | 0.05 bigha |
| West Bengal | 14,400 | 720 | 20 katha | 0.05 bigha |
| Assam (1 bigha = 5 katha) | 14,400 | 2,880 | 5 katha | 0.2 bigha |
| Madhya Pradesh | 12,000 | 600 | 20 katha | 0.05 bigha |
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 bigha and katha
Bigha: A bigha is a traditional Indian land unit whose size is not standardised — it ranges from roughly 1,500 to 2,530 m² depending on the state and on whether a "pucca" (large) or "kachha" (small) bigha is meant.
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.
Frequently asked questions
- How many katha are in 1 bigha?
- It depends on the state. In most states 1 bigha = 20 katha, but in Assam 1 bigha = 5 katha — so a katha is a different fraction of a bigha depending on the state. In Bihar, 1 bigha = 20 katha; across the states listed it ranges from 5 to 20. Choose your state in the converter above.
- Are the bigha and katha the same in every state?
- Both are traditional units whose absolute size changes by state, so the land area they represent is not the same everywhere. The conversion between them also changes by state, so pick your state for an accurate result. For legal or property use, confirm against your local revenue records.
- How do I convert bigha to katha?
- Pick your state above, then type the amount in the converter — it uses that state's recorded values for both units. For example, in Bihar, multiply bigha by 20 to get katha.
- Which states does this bigha-to-katha converter cover?
- Both bigha and katha are recorded together in: Bihar; West Bengal; Assam (1 bigha = 5 katha); Madhya Pradesh. Other states record only one of the two units, so a reliable conversion between them isn't possible there without a local figure.
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.