NUTRITIONAL CALCULATOR FOR CATS

A Weight Management Tool for Adult Cats

This tool was designed to aid the veterinary health care team in making nutritional assessments and recommendations to help their patients maintain or achieve their healthy weight. You can share this information with clients with a take-home worksheet. Use the report function to generate a summary of the calculation.


We are providing two methods of estimating the initial daily calorie intake for weight management: using the pet's current caloric intake or if current caloric intake is unknown, the auto-calculate feature will calculate the estimated initial daily calories for weight management.CloseAny daily calorie recommendation is a starting recommendation. Please monitor the pets body weight and adjust as needed to achieve ideal weight.
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A variety of factors should be considered when assessing ideal weight: Illness, lactation or other special health conditions; environmental factors, breed and age of the animal all play a role.Close
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The formulas and values that we've used in this calculator are shown below.
RER Weight Management Energy Reco

Adult Cat (0.8 * RER)

MER (for BCS 4 & 5)

Intact Cat (1.2 * RER)

Neutered Cat (1.0 * RER)


RER = Resting Energy Requirement (70 * body weight (or ideal body weight) in kg^0.75)

MER = Maintenance Energy Requirement (RER * appropriate K-value based on species/neuter status)

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Ideal Weight

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% Over Ideal Weight

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Estimated Initial Daily Calories

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Suggested Feeding Amount

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Ideal Weight Means A longer and Happier Lifetime

Achieving and maintaining healthy weight scores in pets has been proven to reduce the risk of illness and add to the longevity and general well-being of the animal. As animal advocates, we take on the challenge of educating and coaching our pet-owner community about nutrition and best practices in feeding. We would love to hear from you! Submit your feedback and suggestions about this tool on our Contact Form.

Pet Nutrition Alliance Copyright © 2017

Disclaimer: This tool is designed to be used only by veterinary professionals. For obese pets with a body condition score of 7/9 or higher, we advise a weight loss program under the direct guidance of the veterinary health care team. This calculator is only a guideline. Regular monitoring and consideration of outside factors is critical for achieving safe and healthy weight management outcomes. PNA may adjust the formulations based on new data findings.