Question: 1 kg is how many megaton?
Answer: Convert Megatonnes to Kilograms 1 Megatonne: 1 Megatonne or metric megaton (unit of mass) is equal to 1,000,000 metric tons. A metric ton is exactly 1000 kilograms (SI base unit) making a megatonne equal to 1000000000 kilograms. 1 Mt = 1000000000 kg.