1 grano (gr) = 64,79891 mg
1 dracma = 27,343749999961 gr = 1,771845195309973 g
1 onza (oz) = 16 dracmas = 28,34952312495957 g
1 libra (lb) = 16 oz = 453,5923699993531 g
1 stone (st) = 14 lb = 6,350293179990943 kg
1 arroba = 25 lb = (1,7857142857143 st) = 11,33980924998383 kg
1 quintal corto (US ctw) = 4 arrobas (100 lb) = 45,35923699993531 kg
1 quintal largo (UK ctw) = 8 st (112 lb) = 50,80234543992754 kg
1 cuarto corto (US qtr) = 5 US ctw (20 arrobas) = 226,7961849996766 kg
1 cuarto largo (UK qtr) = 5 UK ctw (40 st) = 254,0117271996377 kg
1 tonelada corta (US ton) = 4 US qtr (80 arrobas) = 907,1847399987064 kg
1 tonelada larga (UK ton) = 4 UK qtr (160 st) = 1016,046908798551 kg