Question

Convert 45 mg to kg.
Help?

Answer 1

There are 1000 mg to 1 g, and 1000 g to 1 kg.

So there are 1,000,000 mg to 1 kg, which makes

45 mg = (45 mg) * (1/1,000,000 kg/mg) = 0.000045 kg

(Basically, you move the decimal point to the left 6 times.)