Measurements
Surface Area
1 acre = 2.51 rai 1 hectare = 6.275 rai 2.5 acres = 1 hectare 1 rai = 0.1593 hectare 1 rai = 400 Wa Volume
1 gallon(US) = 3.789 litres 1,000 litres = 1Cubic Metre
1 Cubic Metre weighs 1 Tonne (metric of course!)1 Litre of Gasoline weighs 0.76 Kg