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Cat Food Calculator
Estimate a food portion for a healthy adult pet from weight, an energy-needs factor, and the food label’s calorie density.
- Estimated daily food, g
- 65
- Food per meal, g
- 32.5
- Estimated daily energy, kcal
- 238
How the calculation works
RER = 70 × kg^0.75; daily energy = RER × factor. Food grams = (energy − treats) × 100 / kcal per 100 g.
Inputs
- Pet weight, kg
- Daily energy factor
- Food energy, kcal/100 g
- Treat energy, kcal/day
- Meals per day
Calculation details
An initial estimate for an adult pet in appropriate body condition. Confirm the factor with a veterinarian; growth, pregnancy, illness, and weight loss need a separate plan.
Use the food label’s calorie density. Include all treats and adjust portions by monitoring weight and body condition.
Updated: 2026-10-02