Convert Bigha to Katha
Both the bigha and the katha are state-variable land units, so the conversion changes by state โ 1 bigha = 5โ20 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 โ Katha | 1 Katha โ 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 |
| Bangladesh | 14,400 | 720 | 20 katha | 0.05 bigha |
In India these land units vary by state and even by district, and local custom can differ from the standard value; in Bangladesh they are standardised nationwide. For any legal, property or financial purpose, confirm the value against your own land records โ the patwari or tehsil office in India, or your AC (Land) office and mouza records in Bangladesh โ before relying on it.
About bigha and katha
Bigha: A bigha is a traditional South Asian land unit whose size is not standardised in India โ it ranges from roughly 1,500 to 2,530 mยฒ depending on the state and on whether a "pucca" (large) or "kachha" (small) bigha is meant. In Bangladesh it is fixed at 14,400 sq ft (20 katha).
Katha: A katha (also spelt kattha) is the common land unit across eastern India and Bangladesh. In most states 1 bigha = 20 katha, but in Assam 1 bigha = 5 katha, so the kathaโs size varies widely by state. Bangladesh is the exception that fixes it: there a katha is 720 sq ft everywhere.
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 โ 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 โ 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; Bangladesh. 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 โ
Full state-by-state size reference (bigha, biswa, katha, dhur) โ
How we calculate this โ method, assumptions and limits
The exact conversion
1 bigha = 20 katha.
What we assume
The Bigha is not a fixed size. It is defined by local revenue practice, so its area differs by state. This page defaults to Uttar Pradesh, Bihar & Rajasthan (pucca); use the selector to switch, and the result changes with it.
Where the sources agree โ and where they donโt
We record a confidence level for every regional value from our research pass, and we publish it rather than hiding it. High means multiple independent references matched. Medium means the value is well attested but corroboration is thinner, so treat it as indicative and confirm against your local record.
| Region | 1 bigha in sq ft | Confidence |
|---|---|---|
| Uttar Pradesh, Bihar & Rajasthan (pucca) | 27225 | High |
| Rajasthan (kachha) | 17424 | High |
| Uttar Pradesh (kachha, western UP) | 9075 | Medium |
| West Bengal | 14400 | High |
| Assam | 14400 | High |
| Madhya Pradesh | 12000 | High |
| Himachal Pradesh (1/5 acre) | 8712 | High |
| Gujarat (vigha) | 17424 | High |
| Haryana & Punjab (kachha basis) | 9075 | Medium |
| Haryana & Punjab (pucca basis) | 27225 | Medium |
| Bangladesh | 14400 | High |
Because the documented values genuinely differ between regions, we show each variant instead of averaging them into a single number. An average would be wrong everywhere.
- Haryana & Punjab (kachha basis): Bigha is not standardised in Haryana/Punjab โ local 1/5, 1/4 and 1/2-acre bighas (8,712 / 10,890 / 21,780 sq ft) also exist. Confirm against local records.
- Haryana & Punjab (pucca basis): Bigha is not standardised in Haryana/Punjab โ several local bases exist. Confirm against local records.
- Bangladesh: Bangladesh is the one place the bigha IS standardised: 20 katha of 720 sq ft each. It is often quoted as "33 decimal", which is a rounding โ the exact figure is 33.06 decimal.
What this converter does not account for
- Local custom below state level. Districts and even individual villages can use a different working value from the state norm. The figure here is the state-level standard.
- Values marked medium confidence. These are the ones most worth checking against your own paperwork before you rely on them.
- Historic and pre-survey records. Older deeds may use a value that predates the current survey settlement for that area.
- Legal and transactional use. This is a calculation aid, not a legal document. For a sale, mutation or dispute, the figure that governs is the one in your official land record.
- Rounding in the displayed result. The underlying maths runs at full precision; what you see is rounded for readability, so a long chain of manual conversions may drift slightly.
Sources
- Department of Land Resources, Ministry of Rural Development (India) โ the central department responsible for land records and the Digital India Land Records Modernisation Programme, under which the state portals below are maintained.
- Bihar Bhumi โ Revenue & Land Reforms Department, Bihar โ the official Bihar land-record portal; the authority for katha, dhur and dhurki values used in Bihar revenue records.
- UP Bhulekh โ Uttar Pradesh land records โ the official Uttar Pradesh record-of-rights portal, used to corroborate bigha and biswa values for UP.
- Wikipedia: Bigha โ a cross-check on the historical spread of values, cited for corroboration rather than as a primary authority.
Where references disagree we show the documented variants rather than picking one. Every conversion factor on this site is recomputed and re-verified automatically on each build โ the check confirms exact round-trips and cross-unit consistency across all pairs, so a wrong figure fails the build rather than reaching this page.