Marla to Biswa / Katha (Uttar Pradesh / Bihar): the quick answer
To convert marla to biswa / katha (Uttar Pradesh / Bihar), multiply the value by 0.2. To go the other way, multiply biswa / katha (Uttar Pradesh / Bihar) by 5 to get marla.
↔ Convert biswa / katha (Uttar Pradesh / Bihar) to marla instead