Quick guide
How to use this calculator
- Choose a complete worked use case or enter the measurements, package facts, provider prices, dates, policy terms, or veterinarian-supplied target for your own scenario.
- Keep units consistent and preserve distinctions between measured records, label arithmetic, planning assumptions, insurance terms, and professional targets.
- Read the intermediate results and calculator-specific boundary before using the summary in a feeding conversation, household budget, weight record, or aquarium plan.
Calculation method
Transparent pet-care arithmetic
RER in kcal/day = 70 × body weight in kilograms^0.75.
The calculator exposes the entered assumptions and intermediate amounts rather than generating a hidden feeding rule, ideal weight, health classification, policy decision, or animal-care recommendation.
Worked example
Three practical use cases
Use the preset buttons above to load small cat, medium dog, large dog. Each preset fills every required field so you can inspect the calculation before replacing it with your own values.
RER in kcal/day = 70 × body weight in kilograms^0.75.
Supported inputs
Precision and limits
Measurement and planning support
Results summarize entered records, labels, quotes, dimensions, policy terms, professional targets, or transparent energy equations. They do not diagnose disease, assess symptoms, determine treatment, prescribe feeding, or certify animal welfare.
Private by default
Use short non-identifying labels. Entered pet information and results stay in this browser tab and are not placed in URLs, analytics, storage, session replay, an account, or a cloud health record.
No emergency or medication use
Do not use these calculators for poisoning, breathing difficulty, collapse, medication or insulin dosing, emergency triage, or other urgent decisions. Contact a veterinarian or emergency veterinary service directly.
Calculator-specific boundary
RER estimates energy used at rest; it is not a feeding prescription. Growth, health, body condition, activity, environment and veterinary goals can change actual needs.
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