Is 5 mg more than 300 mcg?

1 gram = 1000 milligram (mg )

1 milligram (mg) = 1000 mcg (µg)

300 micrograms=0.300 mg.

333 micrograms=one third of a milligram

5 milligrams is 16.7 times more than 300 micrograms.

"milli" is for thousandths in this case.

1 microgram is one millionth of a gram.

Many, many web pages for converting among different measurements to be 100 % certain in all cases.

Yes, 5mg is more than 300mcg or 0.3mg.