Mẫu (Northern Vietnam) to Hectares: the quick answer
1 mẫu-b = 0.36 ha
1 mẫu (northern Vietnam) equals 0.36 hectares
To convert mẫu (northern Vietnam) to hectares, multiply the value by 0.36. To go the other way, multiply hectares by 2.77778 to get mẫu (northern Vietnam).