How many g are in 2 kg?

No it does not. It equals 1,200g.

There are 1000 grams in a kilogram. "Kilo" is a prefix meaning 1,000. Therefore to convert to grams you must multiply by 1000. 1.2 * 1000 = 1,200g. (Note: you can calculate this easily simply by moving the decimal point 3 places to the right.)