Calorie Content of Dog Food/Cat Food
Calculate the metabolizable energy (kcal ME) in any dog or cat food using the guaranteed analysis. Compare foods and control portions accurately.
Use CalculatorChoose dog or cat first, then enter the details that match your pet's species, weight, routine, and current situation.
Feeding your pet the right amount is one of the most impactful things you can do for their long-term health. Too much food leads to obesity, which shortens life and causes chronic disease. Too little leads to nutritional deficiency and poor body condition. Yet the feeding guides printed on pet food bags are notoriously imprecise - they are typically calculated for the average adult dog at rest and do not account for your pet's unique metabolism, activity level, neuter status, or current body condition. The Dog and Cat Food Calculator generates a personalized daily feeding recommendation based on your pet's specific profile, calculated using the veterinary metabolizable energy requirement (MER) formula.
The MER Formula for Dogs
Resting Energy Requirement (RER) = 70 x (body weight in kg)^0.75
Metabolizable Energy Requirement (MER) = RER x life stage/lifestyle multiplier
| Dog Category | MER Multiplier | Example |
|---|---|---|
| Neutered adult (ideal weight) | 1.6 | RER x 1.6 |
| Intact adult | 1.8 | RER x 1.8 |
| Inactive/obese-prone adult | 1.2-1.4 | RER x 1.2-1.4 |
| Weight loss | 1.0 (use ideal body weight) | RER of ideal weight x 1.0 |
| Light work (daily walks, some activity) | 2.0 | RER x 2.0 |
| Moderate work | 3.0 | RER x 3.0 |
| Heavy work (sled dogs, working dogs) | 4.0-8.0 | RER x 4.0-8.0 |
| Puppy (0-4 months) | 3.0 | RER x 3.0 |
| Puppy (4 months to adult) | 2.0 | RER x 2.0 |
| Pregnant (last trimester) | 3.0 | RER x 3.0 |
| Lactating | 4.0-8.0 depending on litter size | RER x 4.0-8.0 |
The MER Formula for Cats
RER (cats) = 70 x (body weight in kg)^0.75 (same formula)
| Cat Category | MER Multiplier |
|---|---|
| Neutered adult, indoor, ideal weight | 1.2 |
| Intact adult | 1.4 |
| Inactive/overweight-prone indoor cat | 1.0 |
| Weight loss (use ideal body weight) | 0.8 |
| Kitten (0-4 months) | 2.5 |
| Kitten (4 months to adult) | 2.0 |
| Pregnant | 1.6-2.0 |
| Lactating | 2.0-6.0 depending on litter size |
Sample Daily Feeding Amounts by Weight and Food Type
Use the table below to compare Sample Daily Feeding Amounts by Weight and Food Type.
| Dog Weight | Dry Food (350 kcal/cup) | Wet Food (90 kcal/100g) | Raw (500 kcal/lb) |
|---|---|---|---|
| 5 lbs (2.3 kg) | 1/3 cup | 120g (about 1/2 can) | 50g |
| 10 lbs (4.5 kg) | 1/2 cup | 190g | 80g |
| 20 lbs (9 kg) | 3/4 cup | 300g | 130g |
| 30 lbs (13.6 kg) | 1 cup | 420g | 180g |
| 50 lbs (22.7 kg) | 1.5 cups | 640g | 280g |
| 75 lbs (34 kg) | 2 cups | 875g | 380g |
| 100 lbs (45.4 kg) | 2.5 cups | 1100g | 470g |
Common Feeding Mistakes
- Using the food bag feeding guide without adjusting for neuter status - bags are printed for intact dogs, overfeeding neutered pets by 20-30%
- Not accounting for treats in daily calorie count - treats should be no more than 10% of daily calories
- Free feeding dry food to cats - a major driver of feline obesity; measured meals are strongly preferred
- Measuring by the cup scoop - use a kitchen scale for accurate measurement; cups are imprecise
- Not adjusting feeding amounts as the pet ages and metabolism changes
Frequently Asked Questions
Should I feed my dog once or twice a day?
Twice daily is recommended for most adult dogs. Once daily can lead to excessive hunger, food gulping (a bloat risk factor in large breeds), and hypoglycemia in small breeds. Puppies need 3-4 meals per day until 6 months, then transition to twice daily.
How do I transition my pet to a new food?
Over 7-10 days: days 1-3 feed 75% old food / 25% new; days 4-6 feed 50/50; days 7-9 feed 25% old / 75% new; day 10 feed 100% new food. Faster transitions commonly cause digestive upset.
Note: Feeding estimates are starting points. Adjust portions gradually based on weight trend, body condition, activity, and your pet's response.
Helpful related calculators
Continue with Calorie Content of Dog Food/Cat Food, MER Calculator for Dogs, MER Calculator for Cats for the next practical step.
