Gaj (Square Yards) to Biswa / Katha (Uttar Pradesh / Bihar): the quick answer
To convert gaj (square yards) to biswa / katha (Uttar Pradesh / Bihar), multiply the value by 0.00661157. To go the other way, multiply biswa / katha (Uttar Pradesh / Bihar) by 151.25 to get gaj (square yards).
↔ Convert biswa / katha (Uttar Pradesh / Bihar) to gaj (square yards) instead