Cat litter cost per pound: compare bags fairly

Litter is sold in bags from 7 to 40 pounds, at prices that make the shelf sticker nearly useless for comparison. A $19 bag can be the cheap option or the expensive one; only the weight tells you. The fix is one division: price divided by pounds in the bag.

A worked example

Say one litter is $18.99 for 40 lb and another is $12.49 for 20 lb. The smaller bag looks cheaper on the shelf. Per pound, the first costs about $0.47 and the second about $0.62. Over a year of refills that gap is real money, and it is why every litter table on this site sorts by cost per pound, not by sticker price. The current ranking is on the cat supplies page and in the full cat litter category.

How much litter a cat uses

A common rule of thumb is roughly 15 to 20 lb of litter per cat per month for a standard box that is topped up and fully changed on a regular cycle, though deep-fill boxes and multi-cat homes run higher. Multiply your monthly pounds by a litter's cost per pound and you have its true monthly cost, which is the number worth comparing.

Per pound is not the whole story

Clumping litter is used differently from non-clumping: clumps are removed daily and the box is topped up, while non-clumping litter is usually changed out completely more often, so the same cat can go through more pounds of it. Dust, tracking, and whether your cat will actually use it all matter more than a few cents per pound. Use cost per pound to shortlist, then let your cat vote.

Watch the size games

Brands resize bags without changing the shelf position or the headline price. A bag that quietly goes from 35 lb to 31.5 lb at the same price is a price rise of about 11 percent that only shows up per pound. Because this site records both price and size every day, those rises show up in the tracked tables even when the sticker does not move.