Sào (Northern Vietnam) to Bigha (Uttar Pradesh / Bihar, Pucca): the quick answer
To convert sào (northern Vietnam) to bigha (Uttar Pradesh / Bihar, pucca), multiply the value by 0.142333. To go the other way, multiply bigha (Uttar Pradesh / Bihar, pucca) by 7.02579 to get sào (northern Vietnam).
↔ Convert bigha (Uttar Pradesh / Bihar, pucca) to sào (northern Vietnam) instead