Start here to understand how calorie needs are calculated using Resting Energy Requirement (RER) and activity multipliers (MER).

RER ≈ 70 × (body weight in kg)^0.75. This is your pet’s base energy use at rest.

Typical ranges: dogs 1.2–3.0; cats 1.0–1.6. Our calculators apply these values for each life stage.

Use our 1–5 BCS scale… Start at 3 and adjust after weekly weigh-ins.

Enter your food’s energy density (kcal/cup or kcal/100g) to convert calories into cups or grams.