One kg = 1000 grams. So one gram is 10^-3 kilograms. One mili gram is 10^-3 gram = 10^-6 kg. Kilograms and grams are both the metric units of mass.
Four million milligrams is four kilograms.
None whole . 15 mg is 0.0015 kilo
500,000 mg
166000000 mg
12,000 milligrams = 12 grams = 0.012 kilograms
1.4 kilograms is 1,400,000 milligrams.kg x 1,000,000 = mg
25 kilograms is 25000000mg @1 million mg per kilogram
60 mg=0.00006 kg
32,000 mg = 0.032 kg
35.6 mg = 0.0000356 kg
2,500 mg = 0.0025 kg
1 kg = 1000000 mg