Litter Box Calculator

Enter how many cats you have to get the minimum number of litter boxes you should provide, based on the widely used N+1 rule. All processing runs locally in your browser. Your data is not uploaded to any server. 100% Local

How to Use the Litter Box Calculator

Enter the number of cats in your home and how many floors they can access, then press Calculate. The result shows the minimum number of litter boxes recommended by the N+1 rule, plus the multi-floor minimum so no cat has to travel far.

Understanding the N+1 rule

• The rule is simple: one litter box per cat, plus one extra.
• Two cats need at least three boxes, three cats need at least four, and so on.
• In a home with several floors, keep at least one box on each floor.
• Spread boxes out; cats often avoid using two boxes placed side by side.

Features

• Minimum box count from the common N+1 rule
• Multi-floor advice with at least one box per floor
• Works for one cat or a large multi-cat household
• Instant result with a copy button
• All processing runs locally in your browser. Your data is not uploaded to any server.

General guidance only. This is a starting point, not veterinary advice. If a cat stops using the litter box, rule out medical causes with your veterinarian first.

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