Cat Food Carbohydrate Calculator

How many carbohydrates are in cat food?

Carbohydrate content varies widely depending on food format and recipe. Wet and canned cat foods range from near 0% to about 34% carbohydrates on a dry matter basis. Dry kibble consistently runs between 20% and 35% — starch is needed as a binder during extrusion.

Most labels omit carbohydrates entirely. The standard method is to subtract protein, fat, fiber, moisture, and ash from 100%. The calculator does this automatically and also converts the result to a dry matter basis so you can compare a wet food against a dry food on the same basis.

Why dry matter carbs matter

A wet food that shows 4% carbs as fed can actually be 18% on a dry matter basis once moisture is removed from the calculation. A dry food at 28% as fed sits at around 31% dry matter. Without the dry matter conversion, the moisture difference makes wet foods appear much lower in carbs than they actually are.

How the calculation works

Example: a wet food with 10% protein, 5% fat, 1% fiber, 78% moisture, 2% ash gives 4% carbs as fed and about 18.2% dry matter.

What values to enter from the label

Carbohydrate levels in commercial cat foods

The tables below show estimated dry matter carbohydrate levels for wet and canned adult cat foods. Dry matter basis makes the comparison fair across foods with very different moisture levels.

All dry cat foods are excluded — they all fall between 20% and 35% DM carbs due to the extrusion process. Foods that don't disclose enough nutrients to calculate carbs (Whiskas, Dine, Feline Natural, Fussy Cat) are also excluded.

Carb levels in adult cat foods (wet/canned, % dry matter)

* Moisture was not declared on the label; an average value of 78% was used in the calculation.

** These three foods have declared nutrients that already add up to 100% or more before carbohydrates are counted. Actual moisture is likely lower than the maximum figure on the label. Treat these as effectively zero-carb but verify with the manufacturer.

Carb levels in kitten cat foods (wet/canned, % dry matter)

* Moisture not declared; 78% average used. The kitten food market has far fewer wet options — many brands only publish dry kitten foods.

Carbs as fed vs dry matter carbs

What if ash is not listed?

Some labels omit ash. The best option is to contact the manufacturer for their typical analysis. If you use a placeholder (2% for wet food, 7–8% for dry food), the result becomes less reliable — useful for rough screening but not for precise dietary management.