Dog Calorie & Food Portion Calculator

After spaying or neutering, reproductive hormone levels decrease, causing the basal metabolic rate (RER) to drop by approximately 20-30%. Therefore, if you maintain the same food portions, neutered dogs are highly prone to accumulating excess fat and becoming obese.

For dogs that need to lose weight, you must calculate based on target weight rather than current actual weight. This allows the body to establish a safe caloric deficit for healthy weight loss.

RER (Resting Energy Requirement) is calculated using the international veterinary formula: RER = 70 × (Weight in kg)^0.75. This represents the minimum energy needed to sustain vital functions of the heart, lungs, and kidneys at complete rest.

MER (Maintenance Energy Requirement) is the actual daily energy needed. MER = RER × Activity Factor. For example: Neutered dog = 1.6; Active dog = 2.5; Puppy = 3.0.

Every kibble brand lists the Metabolizable Energy (ME) value on the packaging in kcal/kg format. This value typically ranges from 3,300 to 4,200 kcal/kg. Enter this number into the calculator to measure grams with maximum accuracy.

According to veterinary standards, dogs need approximately 50-60ml of water per kilogram of body weight per day. This amount increases if the dog eats exclusively dry kibble or is active in hot weather conditions.

Puppies under 4 months old are in an explosive bone and joint development phase. They require 3 times the baseline RER (MER = 3.0), which is double that of adult dogs of the same weight.

Divide meals into 3-4 smaller portions per day, and add cooked pumpkin puree or high-fiber, low-calorie vegetables (such as cucumber or green beans) to increase stomach volume and help your dog feel fuller longer.