Curious about my Apoks genetics...
Don't worry about your questions, they are perfectly logical. As goes a metric scale, most scales these days have a button for measuring in grams or pounds/ounces. I do know that one pound=448 grams.
About the adult weight of a ball python, it all depends. Some people say an adult is 1,000 grams. This may not always be true. If someone power feeds, they could reach 1,000 in their first year. On the other hand, a 10 year old ball python could weigh 1,000 grams (It would be a neglected ball python in most likely poor health). (1,000 grams=2.2 pounds).
As far as breeding goes, the female should weigh more than 1,500 grams, the male more than 500 grams.
Jennifer