Compare Cat Foods

Compare Cat Foods

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Cat Food Nutrition Calculator

Convert any nutrient to a dry-matter basis, find calorie density, work out phosphorus per 100 kcal, or recover a food’s moisture — for any label, or any food in our catalog.

Watercolor illustration of Iggy, an orange and white tabby cat wearing a plaid bow tie, standing on a wooden platform beside a vintage desk calculator and a colorful abacus, surrounded by potted plants.

Enter each value exactly as printed on the label’s Guaranteed Analysis (the as-fed numbers), then pick its unit. ppm is the same as mg/kg.

Protein
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Fat
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Fiber
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Phosphorus
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Convert to a dry-matter basis

Cat food labels list nutrients as percentages of the food as it comes in the can or bag— water included. Because a wet food can be >75% water and a kibble under 10%, comparing those label percentages directly is misleading. Removing the water puts every food on the same footing: this is the dry-matter basis, and it’s how every nutrient on this site is normalized. Enter a nutrient’s as-fed value in whatever unit the label uses — %, g/kg, mg/kg, or IU/kg for vitamins — along with the food’s moisture, and you’ll get its dry-matter value (with the % equivalent shown too). You can add any nutrient we track — protein, fat, the minerals, taurine, and each omega component — or add a field of your own. See the methodology for the full reasoning.

Calorie density (kcal/kg)

Labels usually print calories per can, cup, or pouch. To compare foods you need calories per kilogram — the standard density. Enter the calories for one serving and that serving’s weight (ounces or grams) to get kcal/kg.

Phosphorus per 100 kcal

Phosphorus matters for cats with kidney concerns, and it’s often published as milligrams per 100 kilocalories rather than as a percentage. Enter that figure along with the food’s calorie density and moisture to see the equivalent dry-matter percentage. The same tool works for any mineral published on an energy basis.

Find a missing moisture value

Sometimes a label doesn’t state moisture but does publish both an as-fed and a dry-matter value for a nutrient. From any such pair you can work backward to the moisture. Enter a few pairs — they should all point to the same moisture, which is the check that confirms the answer.

For informational purposes only — not veterinary advice. These calculators do the same arithmetic used to prepare the data on this site; the methodology page explains every formula and where the numbers come from.