20kg = 20,000,000 mg
1 lb = 0.453592 kg (to 6 dp) so 20 lb = 9.071847 kg = 9071847 mg
1 kg = 1,000,000 mg
There is .230500 Kg in 230500 mg.
1.2 kg = 1200 mg
Since there are 1000 mg in 1 gram, and 1000 g in 1 kg, there are (1000 x 1000) mg in 1 kg, which is 1,000,000 mg in 1 kg. Or conversely, there are 0.000001 kg in 1 mg (that's 10-6 kg)
544,000,000 mg
The dosage of 2.5 mg per kg multiplied by the weight of the patient (8 kg) would equal 20 mg that should be administered to the patient.
20 mg/kg
10.0kg is 10,000,000mg
270,000,000 mg
112,000 mg
592,000,000 mg