To convert carats to kgs divide by 5000. I've generated some hopefully helpful examples randomly below, as with most random sentences please excuse the repetitive and occasionally comic outcomes.
In 9 carats of ruby's there are 0.0018 kgs, to achieve this take 9 and just divide by 5000.
How many kgs of emeralds are there in 3.3 carats? Just divide by 5000 to get the answer of 0.00066 kgs.
You have 1.1 carats of silver but you need to know how many kgs that is. To get the answer divide by 5000 which gives you 0.00022 kgs.
To convert 4.1 carats into kgs divide by 5000 giving 0.00082 kgs.