Estimate daily energy needs first, commonly resting energy requirement multiplied by a life-stage and activity factor, which is lower for neutered adults.
Then read the kilocalories per can on the label and divide; brands differ widely in energy per can, so counting cans alone is unreliable.
Distinguish complete meals from complementary treats: only cans labeled complete and balanced can serve as the sole long-term diet.
The calculation is a starting point; feel the ribs and reassess body condition every few weeks, and let a vet compute needs for kittens, pregnant cats, or medical cases.
