Acre to Katha Converter

1 acre in katha is 60.5 katha in West Bengal and Ranchi, and 32 katha in Patna and Arrah. The acre (एकड़) is fixed at 43,560 sq ft everywhere, but the katha (कट्ठा) is a local unit whose size changes from place to place. So "1 ekad mein kitna kattha" has more than one right answer.

1 acre and 5 acres in katha, by region

These katha sizes are commonly used local values rather than notified government figures. Within Bihar alone, one acre runs from about 13.33 katha in Bettiah to 32 katha in Patna.

Size of one katha by region

How to convert acre to katha

katha = acres × 43,560 ÷ (sq ft in your katha)

Worked example, Patna: 5 acres × 43,560 = 217,800 sq ft. Divide by 1,361.25 and you get 160 katha. In Bihar a bigha is 20 katha, so this is also 8 bigha.

Same land in Hajipur: 217,800 ÷ 1,901.25 = about 114.5562 katha, which is about 5.7278 bigha. The land has not changed, only the local unit.

Linking katha with bigha

In West Bengal, 1 bigha = 20 katha = 14,400 sq ft, so 1 acre is 3.025 bigha, or 3 bigha and half a katha. In the Brahmaputra valley of Assam the bigha is the same size, but it has only 5 katha. That is why an Assam katha is four times a Bengal katha, and 1 acre is only 15.125 katha there.

Small acre figures: 0.02, 0.03, 0.04 acre

Records in West Bengal and Bihar write area in acre and decimal, so you often see entries like 0.02 acre. Here is what they mean in Bengal katha:

• 0.02 acre (2 decimal) = 871.2 sq ft = 1.21 katha
• 0.03 acre (3 decimal) = 1.815 katha
• 0.04 acre (4 decimal) = 2.42 katha

In Patna katha, the same three entries are 0.64, 0.96 and 1.28 katha.

Acre to katha table by region

Regional columns use the most commonly used size in each area. Confirm your local size with the revenue office.

Tips

• Name the katha. Always say which katha you mean when you write a figure, for example "Bengal katha".
• Trust the acre in the record. Since the acre and decimal never change, use them to settle any doubt.
• Verify. For a sale, partition or court matter, confirm the local katha with the circle office, amin or revenue office, and check the plot on Bihar Bhumi, Banglarbhumi, Jharbhoomi or Dharitree.