1 kcal = 4200 joules = 4,2 kJ
1 MJ (megajoule) = 240 kcal
1 Btu = 0,252 kcal
1 kcal = 3,968 Btu
CV = 0,986 HP = 0,736 kW
1 H P = 1,014 CV = 0,746 kW
1 kg/HI = 0,777 Ib/bu
1 Ib/bu = 1,2872 kg/HI
1 bushel = 35,239 litros
1 litro = 0,0284 bushels
1 tan (tonelada) = 1000 kg = 1,1 tan corta = 0,98 tan larga
1 q (quintal) = 100 kg
1 kg/ha = 0,89 libras/acre
1 libra/acre = 1,12 kg/ha
1 pie/min (fpm) = 0,0183 km/hora = 0,0051 m/seg.