If you are talking about water, the answer is 50. But if you are talking about air or murcury, it would be different. This is because cc (cubic centimeter) measures volume, while milligrams measure mass. So the more dense the substance, the less volume it would take to be 50 mg.
50 and below. Anything over 50 you must have the motorcycle endorsement.
there are 1,000,000 milligrams in a kilogram
1000mg
320 miligrams
1 gram are 1000 miligrams.
13 US ounces equal 384.455884 ccs.
This happens to be about 2 grams.2g
Miligrams are 1000 times smaller than grams. So to make 2,000 grams you need 2,000,000 miligrams.
10 milligrams in 1 centigram.
1.5 g = 1500 mg
According to S&S a 234" motor is equivalent to 2030 CCs.
480