Question: what is the average weight for a 12 week old kitten?
Answer: Every cat is different of course, but as a very broad guideline, the average cat will reach a weight of 10lbs or so before his first birthday. So 12 week old kitten weight is usually about 3lb. Again, this is a broad guideline, for example a Maine Coon kitten like this beauty, is going to weigh a bit more than that.