Acres to Mẫu (Central Vietnam): the quick answer
1 ac = 0.814257 mẫu-t
1 acre equals 0.814257 mẫu (central Vietnam)
To convert acres to mẫu (central Vietnam), multiply the value by 0.814257. To go the other way, multiply mẫu (central Vietnam) by 1.22811 to get acres.