What measurement unit would you like to use? Some useful units of measurement for weights include:

The Metric System of Measurements uses the mass units: gram (g), kilogram (kg) and tonne (t).
1000 g = 1 kg
1000 kg = 1 tonne

Adding prefixes of the International System of Units (SI) allows to express weight as multiples or fractions of 1 gram:
1 gigatonne 	(Gt) 	=1 000 000 000 000 000 g
1 megatonne 	(Mt) 	=1 000 000 000 000 g
1 tonne 	(t) 	=1 000 000 g
1 kilogram 	(kg) 	=1 000 g
1 gram 	(g) 	=1 g
1 milligram 	(mg) 	=0.001 g
1 microgram 	(µg) 	=0.000 001 g
1 nanogram 	(ng) 	=0.000 000 001 g
1 picogram 	(pg) 	=0.000 000 000 001g

Imperial and US weight units can also be expressed as metric units:
Metric units
1 US ton 	(ton) 	=0.907 tonne
1 UK ton 	(ton) 	=1.016 tonne
1 lb 	(pound) 	=453.59 g
1 oz 	(ounce) 	=28.35g
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