How many grams of cat food a cat should eat per day depends mainly on the cat's age, weight, activity level, health condition, and the type of cat food it consumes.
Generally speaking, adult cats need to eat about 100 to 200 grams of cat food per day, while kittens, pregnant cats, or lactating mother cats need more cat food to meet their growth and development needs.

Meanwhile, cats eating complete indoor adult cat food typically consume around 45-60 grams of food per day. However, this is just a general guideline, and the specific amount should be adjusted based on the cat's individual needs. For example,
Larger, more active cats may need more food, while smaller, less active cats may need less food.