Convert katha to square feet. A katha's size differs by state, so pick your state for an accurate result — the calculator also shows acres and square metres.
Katha is NOT standardised — it varies by state and district. Values here are widely-cited state figures; confirm the local definition and official records before a transaction.
Katha (also spelt kattha) is a land unit used across eastern and northern India, but its size varies widely by state — from 600 sq ft in Madhya Pradesh to 2,880 sq ft in Assam. Pick your state below and this calculator gives the accurate square-feet value, plus acres and square metres.
Like bigha, katha is a traditional non-standardised unit that each region defined independently. In West Bengal 20 katha make a bigha (720 sq ft each); in Assam katha is much larger. In Uttar Pradesh the equivalent unit is called biswa. Always confirm the local value before buying or selling.
Frequently asked questions
How many square feet is 1 katha?
It depends on the state — 720 sq ft in West Bengal, 1,361.25 in Bihar, 2,880 in Assam. Pick your state above.
How many katha in a bigha?
20 katha make a bigha in West Bengal and Bihar; Assam uses 5 katha per bigha.
Is katha the same as biswa?
In Uttar Pradesh the katha-sized unit is called biswa (about 1,361 sq ft).
Why does katha vary?
It is a traditional unit each state defined differently, and those values persist in local dealings.
Traditional land units vary by region and even by district; always confirm the local definition and official land records before any property transaction.
Written by the CalcPine team · Reviewed for accuracy · Last updated 14 July 2026 · Method: square feet = katha × state sq-ft-per-katha.
