milli means 1 thousandth, 1/1000. 1 x 10-3 g
micro means 1 millionth, 1/ 1000000. 1 x 10-6 g
What is meant by a micro milligram? A millionth of a milligram? That is 1 x 10-9 g. A nanogram.
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I milligram = one-thousandth of a gram...
1 carat = 200 milligrams 1 milligram = 0.005 carat
1 milligram = 1,000 micrograms 500 milligrams = 500,000 micrograms
There are 1000 micrograms in one milligram. Therefore, 0.9 milligrams is equal to 0.9 x 1000 = 900 micrograms.
1 milligram = 1000 mcg45 milligrams = 45000 mcg45 mg does not equal 45 mcg