1 gram = 1 g
1 milligram = .001 g
1 microgram = .000001 g
microgram is the smallest unit.
confirmation:
Google "Metric prefixes", or look them up in a Websters' collegiate dictionary.
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Prefix: Symbol: Magnitude: Meaning (multiply by):
Yotta- Y 1024 1 000 000 000 000 000 000 000 000 Zetta- Z 1021 1 000 000 000 000 000 000 000 Exa- E 1018 1 000 000 000 000 000 000 Peta- P 1015 1 000 000 000 000 000 Tera- T 1012 1 000 000 000 000 Giga- G 109 1 000 000 000 Mega- M 106 1 000 000 myria- my 104 10 000 (this is now obsolete) kilo- k 103 1000 hecto- h 102 100 deka- da 10 10 - - - - deci- d 10-1 0.1 centi- c 10-2 0.01 milli- m 10-3 0.001 micro- u (mu) 10-6 0.000 001 nano- n 10-9 0.000 000 001 pico- p 10-12 0.000 000 000 001 femto- f 10-15 0.000 000 000 000 001 atto- a 10-18 0.000 000 000 000 000 001 zepto- z 10-21 0.000 000 000 000 000 000 001 yocto- y 10-24 0.000 000 000 000 000 000 000 001
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The smallest unit is a microgram, followed by milligram, then gram. 1 gram is equal to 1,000 milligrams, and 1 milligram is equal to 1,000 micrograms.
Kilogram is 1000 grams. Milligrams is 1/1000 milligrams. Micrograms is 1/1,000,000 grams. Therefore micrograms is the smallest unit.
0.001 a milligram is 1,000 of a gram, 1 microgram is 1,000,000th of a gram.
There are 1,000 mcg in 1 milligram (mg).1 microgram = 0.001 milligrams
0.001 grams equals 1 milligrams (mg). And 0.001 milligrams in 1 microgram (mg), therefore 0.000001 grams (or 1 x 10-6) in 1 microgram. There are therefore 100,000 micrograms in a gram and in context 1000 milligrams in a gram.
weight or mass. A microgram is one millionth of a gram, whereas a milligram is one thousandth of a gram. They are commonly used to measure small quantities of substances, such as medications or chemicals.
kilogram, gram, decigram, centigram and milligram