convert 2.251 g to mg.?

1 g <------------> 1000 mg
2.251 g <------>2.251 x 1000 mg = 2251 mg

Move the decimal point three places. It make s it 2251grams.

2.25100 grams = 2251 milligrams
1 gram = 1000 milligrams

2.251g=2251mg

there are 1000 mg in 1 g

2.251g = 22510mg

The prefix "milli-" means 1000, so in this case, just multiply 2.251g with 1000 and that shall get you the answer of 22510mg.

1 gram = 1000 milligrams
2.251 grams = 2251 milligrams