Cat Calorie Calculator
Calculates resting and maintenance energy requirements for cats from weight and a life-stage MER factor.
Limitation: Educational estimate only.
How to Use the Cat Calorie Calculator
Enter the fields below, then review the educational estimate.
Enter weight and unit.
Indoor cats often need less
Neutered indoor adults commonly use lower multipliers; watch body condition rather than chasing a single number.
What This Calculator Estimates
Returns RER, MER factor, and maintenance kcal/day for educational cat energy planning.
Worked Examples
4 kg neutered adult
Inputs
Result
RER ≈ 198.0; ×1.2 ≈ 237.6.
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
Scientific Background
Veterinary nutrition education uses allometric resting energy with species-appropriate maintenance multipliers. Individual cats still need body-condition monitoring.
Sources & review
Cat Calorie 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.