West Bengal Katha: check the record first
Katha and Cottah can require local record context. GharGanit does not publish an unverified West Bengal factor; use the deed or official record before converting.
Why there is no universal value here
A regional unit name alone is not evidence of legal area. A factor can vary by district, locality or record system, and a copied web value may not match your documents.
What to check
Read the unit on the registered deed, survey map and current official record. Ask the relevant local authority or a qualified survey professional to confirm the applicable factor before a legal, purchase or boundary decision.
Use a verified local factor transparently
The land converter lets you enter a factor verified for a specific record and keeps that factor visible in the result rather than silently substituting an unsourced value.