1. What is Cat BMI?

Definition: The Feline Body Mass Index (FBMI) is a measure of a cat’s body fat content based on its rib cage circumference and leg length, helping determine if the cat is underweight, ideal, or overweight.

Uses: It assesses your cat’s health status, aiding in weight management to prevent obesity-related issues like diabetes or joint problems.

2. How to Measure Your Cat

Rib Cage Circumference: Measure around your cat’s chest at the ninth rib level while standing (use mm, cm, m, inch, or feet).
Leg Length: Measure from the knee to the ankle on the hind leg (use mm, cm, m, inch, or feet).

3. How to Calculate Cat BMI

Formula:
Convert measurements to cm, then:
\[ \text{FBMI} = \left( \frac{\text{Rib Cage (cm)} / 0.7062 - \text{Leg Length (cm)}}{\text{0.9156}} \right) - \text{Leg Length (cm)} \] Unit Conversions:
1 mm = 0.1 cm, 1 m = 100 cm, 1 inch = 2.54 cm, 1 foot = 30.48 cm.
Ranges: Underweight (< 15), Ideal (15–30), Overweight (> 30).
Example: Rib Cage = 15 inches (38.1 cm), Leg Length = 4 inches (10.16 cm):
\(\left( \frac{38.1 / 0.7062 - 10.16}{0.9156} \right) - 10.16 \approx 37.10\) (Overweight).

4. What the Result Means

Underweight (< 15): May indicate malnutrition or health issues.
Ideal (15–30): Healthy weight range for most cats.
Overweight (> 30): Risk of obesity-related conditions; consult a vet for diet and exercise plans.

Cat BMI Conversion Table

Rib Cage	Leg Length	FBMI	Status
300 mm (30 cm)	100 mm (10 cm)	13.62	Underweight
0.35 m (35 cm)	11 cm	22.03	Ideal
15 inch (38.1 cm)	4 inch (10.16 cm)	37.10	Overweight
1.5 feet (45.72 cm)	13 cm	56.08	Overweight

Cat BMI Calculator© - All Rights Reserved 2024