Dog Food Dry Matter Basis Calculator
Compare dog foods accurately by converting guaranteed analysis values to a dry matter basis — the only fair way to compare wet and dry foods.
What Is the Dog Food Dry Matter Basis Calculator?
Compare dog foods accurately by converting guaranteed analysis values to a dry matter basis — the only fair way to compare wet and dry foods.
When comparing a wet food to a dry kibble, the moisture content makes direct comparison impossible. A wet food showing 8% protein contains mostly water — on a dry matter basis it may actually be 40% protein. This calculator removes moisture from the equation so you can compare foods accurately and understand what your dog is actually getting.
Every result is based on published veterinary research and breed-size-specific growth data — not generic averages. This tool is completely free, works instantly in your browser, and requires no account or sign-up.
How to Use This Calculator
Fill in the required fields above — typically your dog's weight, age, or breed size. Every field has a clear label and hint.
Press the calculate button to get your instant result. No page reload, no account needed, no waiting.
Your result appears immediately below the calculator. It includes the primary answer plus additional context where relevant.
Share, print, or save your result. Always discuss health-related results with your veterinarian before making decisions.
How It Works
The dry matter basis (DMB) calculation removes moisture from the nutrient percentages shown on a pet food label. The formula is: Dry Matter % = (As-Fed % ÷ (100 − Moisture %)) × 100. This standardises all foods to a 0% moisture baseline, making wet food, dry food, raw food, and dehydrated food directly comparable.
For example: a wet food with 8% protein and 78% moisture has a DMB protein of 8 ÷ (100−78) × 100 = 36.4%. A dry food with 28% protein and 10% moisture has a DMB protein of 28 ÷ (100−10) × 100 = 31.1%. The wet food actually provides more protein per gram of actual nutrients despite appearing lower on the label.
Sources: AAFCO Dog Food Nutrient Profiles 2022; NRC Nutrient Requirements of Dogs and Cats 2006; Laflamme DP. Understanding and managing obesity in dogs. Vet Clin North Am Small Anim Pract 2006.
Veterinary Research
Every formula is derived from peer-reviewed veterinary studies and clinical guidelines, not guesswork or generic rules.
Instant Results
No page reload, no waiting, no account needed. Enter your details and your result appears immediately.
100% Private
All calculations happen in your browser. Nothing you enter is ever stored on our servers or shared with anyone.
Always Free
Every calculator on Doggy Calculators is and will always be completely free to use — no premium tier, no catch.
Frequently Asked Questions
Sources & References
This calculator's formulas are based on the following peer-reviewed and authoritative veterinary sources:
- WSAVA Global Nutrition Guidelines — RER formula, caloric requirements, and feeding protocols
- Association of American Feed Control Officials (AAFCO) — Nutritional standards for complete and balanced dog food
- National Research Council u2014 Nutrient Requirements of Dogs — Scientific basis for canine dietary requirements
⚠️ These calculators are reference tools only. Always consult a licensed veterinarian before administering medication or making medical decisions.