Bigha (Uttar Pradesh / Bihar, Pucca) to Square Chains: the quick answer
To convert bigha (Uttar Pradesh / Bihar, pucca) to square chains, multiply the value by 6.25. To go the other way, multiply square chains by 0.16 to get bigha (Uttar Pradesh / Bihar, pucca).
↔ Convert square chains to bigha (Uttar Pradesh / Bihar, pucca) instead