Use this useful tool to convert weight choosing one of the 28 units of measurment included in this app, that are:

Metric Units of Weight:
kilogram, gram, microgram, milligram, centigram, decigram, dekagram, hectogram and megagram (ton)

Troy Units of Mass/Weight:
grain, pennyweight, ounce and pound

Avoirdupois units of Mass:
grain, dram, ounce, pound, short hundredweight, short ton, long hundredweight and long ton

Apothecaries Units of Mass:
grain, scruple, dram, ounce and pound

Other Units of Weight / Mass:
carat and gamma