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Cat Food Moisture Converter – Dry Matter Basis Calculator

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Cat Food Moisture Converter

Convert nutrition percentages from "as‑fed" to dry matter basis for accurate wet‑vs‑dry food comparison.

As‑Fed Nutrition
%
Moisture must be between 0 and 99.9%.
Typical: dry food ~10%, wet food ~78%
Standard Nutrients
Dry Matter Basis Results

Enter values and click Convert to see dry matter percentages.

Moisture (as‑fed)
Dry Matter Factor
Formula: DM % = (As‑fed % / (100 − Moisture %)) × 100

Frequently Asked Questions

Dry matter basis (DMB) removes moisture from the equation, letting you compare the true nutrient levels between foods with very different water contents – especially dry kibble (≈10% moisture) and canned wet food (≈78% moisture). Without conversion, wet food appears to have less protein, but on a dry matter basis the values often become similar.

Use the formula: Nutrient (DM) = (Nutrient % as‑fed / (100 − Moisture %)) × 100. Example: a wet food with 10% protein and 78% moisture → (10 ÷ (100 − 78)) × 100 = 45.45% protein on a dry matter basis.

Dry kibble usually contains 6–10% moisture, while canned/pouch wet food ranges from 75–85% moisture. Semi‑moist foods fall in the middle (25–35%). Checking the guaranteed analysis on the label always gives the exact moisture value.

Absolutely! Use the “Add Custom Nutrient” button to include any nutrient listed on your cat food label – taurine, omega‑3, calcium, phosphorus, etc. The calculator applies the same dry matter formula to each one you enter.

No. Pet food labels show guaranteed analysis on an as‑fed basis. To evaluate nutritional adequacy or to compare foods fairly, veterinarians and nutritionists recommend converting to dry matter. Our tool does exactly that.

Moisture of 100% would mean the food is entirely water with zero dry matter, so the dry matter factor becomes infinite. Real pet foods always contain at least a few percent of dry matter; moisture is never 100%.
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