How many cups are in a bag of cat food?

At 125 g per cup — the middle of the 120–130 g range typical for cat kibble — a 5 lb bag holds about 18 cups, a 10 lb bag about 36, and a 3 lb bag about 11. Note that a cup of cat food weighs more than a cup of dog food (about 125 g against 110 g), so the same bag size gives fewer cups.

A cup measures volume, a bag measures weight — so the conversion needs one number from your own food: how much a level cup of it weighs.

Cups per bag, by bag size

Calculated as bag weight in lb × 453.592 ÷ grams per cup. The middle column (125 g) is the typical cat kibble figure; the outer columns show how much it moves.

Bag size	@120 g/cup	@125 g/cup	@130 g/cup
3 lb	11	11	10
5 lb	19	18	17
7 lb	26	25	24
10 lb	38	36	35
16 lb	60	58	56

Cat kibble is heavier per cup than dog kibble

This is the number people get wrong. Dry cat kibble commonly weighs 120–130 g per cup, while dog kibble is nearer 110 g. A scoop that holds 110 g of dog food holds more than that in cat food — so if you moved from a dog to a cat and kept the same scoop, you are feeding more calories than you think.

The reliable way to check: weigh one level cup of your own cat’s food on a kitchen scale. One minute of weighing beats every average on this page.

From cups to days

Cups per bag is the middle step. Divide by how many cups your cat eats a day, or skip straight to how long a bag lasts, which does that for you by cat weight. For what a cup is worth in energy, see calories per cup of cat food.

Common follow-up questions

Why does my bag say "about 4 cups per pound"? That is roughly 113 g per cup — a dog-food figure. Cat food usually gives fewer cups per pound because it is denser.

Does the bag weight include packaging? Net weight is the food only — use the net figure.

Is a bigger bag cheaper per cup? Usually, but cat food loses its appeal once opened — see keeping it fresh before buying the largest size.

How long a bag lasts → · Calories per cup → · Cat portion calculator → · Cups in a pound (dog) →