A 3-month-old kitten typically weighs around 2 to 3 pounds. However, there can be variations in weight depending on the breed and sex of the cat, as well as the feeding methods employed by the owner. There isn't a strict standard; as long as the kitten is not significantly underweight or overweight, it is generally considered normal, so there's no need to worry excessively.

Generally, there's a correlation between a kitten's age and weight, with an approximate gain of one pound per month. Therefore, a 3-month-old kitten should ideally weigh around 3 pounds. Female kittens might be slightly lighter, around 2 pounds. Each kitten's growth trajectory can vary based on factors like diet. Kittens fed with high-quality cat food and regularly dewormed tend to reach a weight of around three to four pounds. Conversely, those not dewormed regularly or fed lower-quality food may weigh less. Besides cat food, you can occasionally give your kitten probiotics to aid digestion.
The breed and size of a cat also play a crucial role in determining their weight. Small-sized breeds, such as Siamese and Abyssinians, usually have a standard weight range of 5 to 10 pounds. Medium-sized breeds, such as domestic shorthairs, British Shorthairs, and American Shorthairs, typically weigh around 8 to 12 pounds. For large breeds like Ragdolls, Norwegian Forest Cats, and Maine Coons, the standard weight can range from 10 to 25 pounds. Below is a table indicating the normal age-to-weight ratio for cats.
Kitten Age and Weight Chart
| Male Cat | Female Cat | |
| Three Months | 2-3 lbs | 2 lbs |
| Six Months | 5-6 lbs | 3-4 lbs |
| Nine Months | 8-9 lbs | 4-6 lbs |
| Twelve Months | 10-12 lbs | 7 lbs |
Care Tips for Feeding a 3-Month-Old Kitten
At 3 months old, a kitten's digestive system isn't fully developed, making it crucial to be mindful of their diet. Avoid hard kibble, as it can be difficult for them to digest. Softening the food with warm water before serving can reduce the burden on their stomach. Also, it's advisable to avoid feeding them foods with high protein content, as their digestive system may not be able to process it effectively. This is not the time to bathe your kitten, as their baby fur has not completely shed and bathing may cause damage to their skin and fur.