Enter cat's weight and choose the condition of the cat in the tool and the calculator will find the RER and MER for cats
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The Cat Calorie Calculator estimates the energy requirements for neutered cats, kittens, and adult cats based on their RER (Resting Energy Requirement) and MER (Maintenance Energy Requirement) standards. It provides precise estimations so you can feed your cat according to a selected goal.
The calculator estimates your cat’s daily energy needs by using inputs such as weight and condition of the cat.
Calorie requirements vary depending on age, size, activity level, and overall health. On average, adult indoor cats require approximately 20–30 calories per pound of body weight daily. Using the Cat Calorie Calculator provides precise results tailored to your cat.
Neutered cats generally need slightly fewer calories than intact cats. For example, a 10-pound neutered cat requires approximately 200–300 calories per day.
Kittens require more energy than adult cats due to rapid growth—about 2–2.5 times the calories per pound compared to adults.
A healthy adult cat typically needs 50–70 calories per pound. For example, a 10-pound adult cat needs approximately 500–700 calories per day. Requirements differ between neutered and intact adults.
To estimate daily caloric needs:
Cat’s Daily Calorie Requirement (Kcal/day) = 70 × (cat’s weight in kilograms)^0.75
| Weight (kg) | Weight (lbs) | Daily Calories (Maintenance) | Daily Calories (Weight Loss) |
|---|---|---|---|
| 2 | 4.4 | 100–140 | 40–70 |
| 3 | 6.6 | 140–200 | 60–100 |
| 4 | 8.8 | 180–280 | 80–140 |
| 5 | 11 | 220–360 | 100–180 |
| 6 | 13.2 | 260–460 | 120–220 |
| 7 | 15.4 | 300–580 | 140–260 |
| 8 | 17.6 | 340–720 | 160–300 |
To keep your cat healthy, calculate the calories in their food relative to their weight. Indoor cats are prone to obesity if calorie intake exceeds energy needs. You can also use a cat weight loss calculator for guidance.
RER measures the energy required at rest for essential body functions:
MER represents total daily calories, including RER plus activity, growth, and reproduction energy requirements. Factors include:
High-intake food addresses malnutrition. Calculate your cat’s daily calorie needs before continuing high-intake feeding.
No. Neutered cats typically require fewer calories than intact cats. Normal cats may need 5–8 more calories per pound per day compared to neutered cats.
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