Question: how much can 1 balloon lift?
Answer: So if you have a balloon that contains 5 liters of helium, the balloon can lift 5 grams. So a normal amusement park balloon can lift about 14 grams, assuming that the weight of the balloon itself and the string is negligible. If you weigh 50 kilograms (about 110 pounds), then you weigh 50,000 grams.