Cat BMI Calculator

Calculate the Body Mass Index (BMI) for your cat. Essential for pet owners to maintain their cats health and well-being.

Rib cage circumference :


Length of the lower back leg:




The Cat BMI (Body Mass Index) Calculator is a valuable tool designed to help pet owners assess their feline companion's weight status and overall health. Similar to the BMI calculation used for humans, the Cat BMI Calculator takes into account a cat's weight and size to determine whether they are underweight, overweight, or within a healthy weight range.

Using the Cat BMI Calculator is a straightforward process. Pet owners need to input their cat's current weight and, optionally, their length or height into the designated fields. Based on this information, the calculator will generate a numerical value representing the cat's BMI.

BMI Value

The BMI value is then interpreted using established guidelines to determine the cat's weight status. Generally, the following categories are used:

Once the cat's BMI category is determined, pet owners can take appropriate steps to manage their cat's weight and improve their overall health. This may include adjusting their diet, increasing physical activity, and consulting with a veterinarian for personalized guidance.

Regular monitoring of a cat's BMI using the Cat BMI Calculator is essential for maintaining their health and wellbeing. By keeping their weight within a healthy range, pet owners can ensure their feline companions lead happy, active, and fulfilling lives.

Cat BMI Calculation

Calculating a cat's Body Mass Index (BMI) is a useful way to assess their weight relative to their size. While BMI calculations are more commonly used for humans, a similar concept can be applied to cats to help determine if they are underweight, overweight, or at an ideal weight.

To calculate a cat's BMI, you'll need to follow these steps:

Measure Your Cat's Weight: Use a pet scale or take your cat to the vet to get an accurate weight measurement. Record the weight in pounds or kilograms.

Measure Your Cat's Length: Measure your cat's length from the base of their neck to the base of their tail. Record the length in inches or centimeters.

Square the Length: Multiply the length measurement by itself (length x length) to get the squared length.

Calculate BMI: Divide your cat's weight by the squared length. If you measured weight in pounds and length in inches, multiply the result by 703 to get the BMI. If you measured weight in kilograms and length in centimeters, no additional multiplication is necessary.

Interpret the Results: Compare your cat's BMI to the standard ranges for feline BMI. Typically, a BMI below 18.5 indicates underweight, a BMI between 18.5 and 24.9 indicates a healthy weight, and a BMI above 25 suggests overweight.

Here's the formula for calculating a cat's BMI:

BMI = (Weight (lbs) / Length (in)^2) × 703