Why is the formula so complex?
The 0.75 exponent reflects that metabolism scales with surface area, not linear weight.
Health Fitness
Dog Calorie Calculator
Calculate dog calorie with your details.
Personalized estimate
Use realistic inputs for the most useful results.
What this calculator does
Dog calorie needs depend on body weight, age, activity, and health. Calculation starts with Resting Energy Requirement (RER) multiplied by lifestyle factor.
How it works
RER = 70 × (Weight kg)^0.75. Multiply by factor: neutered adult 1.4-1.6, active 2-5, puppy 2-3.
Formula
RER = 70 × (Weight kg)^0.75. Daily needs = RER × lifestyle factor.
Tips for using this calculator
- Start with calculated amount, adjust based on 4-6 weeks of monitoring
- Treats should be <10% of daily calories
- Check food label for kcal per cup—varies widely
- Puppies need 3-4 smaller meals daily
- Senior dogs often need fewer calories (1.4× RER)
Frequently asked questions
What's RER vs MER?
RER is rest calories. MER (Maintenance) adds activity, giving real-world needs.
Why does my vet recommend different calories?
Vets account for health conditions, medications, and weight goals not captured by general formulas.