Dog Food Portion Calculator
Computes dog RER and MER, then divides maintenance calories by the kcal density you enter to estimate portions per day (and optional grams).
Limitation: Educational estimate only.
How to Use the Dog Food Portion Calculator
Enter the fields below, then review the educational estimate.
Enter current body weight and unit.
Labels beat averages
Always prefer the manufacturer’s kcal/cup or kcal/can. Generic averages can mis-size portions.
What This Calculator Estimates
Estimates maintenance calories with educational MER factors, then converts them into portions using your food’s energy density.
Worked Examples
10 kg neutered adult, 350 kcal/cup
Inputs
Result
RER ≈ 393.6 kcal; MER ×1.6 ≈ 629.8 kcal; 629.8÷350 ≈ 1.8 cups.
When to call a veterinarian
Appetite changes, rapid weight shifts, lethargy, vomiting, or suspected toxin exposure need professional care—not another calculator.
Frequently Asked Questions
Still have questions about this calculation?
Try the CalculatorFormulas & Assumptions
Transparent educational arithmetic. Not a veterinary exam, diet prescription, or toxicity tool.
Formula
Resting energy requirement
RER = 70 × (body weight in kg)0</sup>.75
Maintenance energy & portions
MER = RER × factor; portions = MER ÷ kcal_per_unit
Scientific Background
NRC and veterinary nutrition teaching materials commonly start from RER = 70×BW^0.75, then apply MER multipliers. Body condition, illness, and specific diets require professional guidance.
Sources & review
Dog Food Portion Calculator documents the references behind its formulas and assumptions. Always treat results as educational estimates, not personalized professional advice.
Last reviewed
July 23, 2026
Reference
aaha.org
https://www.aaha.org/resources/canine-life-stage-guidelines/Reference
nap.nationalacademies.org
https://nap.nationalacademies.org/catalog/10668/nutrient-requirements-of-dogs-and-catsReference
wsava.org
https://wsava.org/global-guidelines/global-nutrition-guidelines/Free Calculator Hub methodology
Free Calculator Hub
/methodology
See our methodology and corrections policy.