Cat BMI Calculator

The cat BMI calculator is based on the Feline Body Mass Index, which estimates your cat's body's fat content based on its proportions. It is simple and requires only two measurements. To use it, follow these instructions:

1. Make sure your cat is standing with its head in an upright position.
2. Measure your cat's rib cage. Ideally, you want to do this at the 9th rib level, located by the cat's front legs.
3. Measure the length of your cat's lower back leg from the knee to the ankle.
4. Input measured values into the cat BMI calculator. The result will be found using the following formula:

Of course, by rib cagerib cage we mean the circumference, whereas legleg relates to the length.
In fact, to make using our cat weight calculator easier, we have prepared a picture illustrating how to take the measurements:

If you compare it with the BMI calculator, you can see that the principle is slightly different, as there's no mention of weight above.

Although there are five BMI ranges for humans, it was reduced to four for cats. Below, we present the FBMI chart.

To clarify it more, let's use an example. If we consider a cat with a rib cage circumference of 14 inches and a lower back leg of 2 inches, its FBMI is 44.4. Now, if we can change the FBMI value to 29 in the calculator, which is in the healthy weight range, the tool will show us that the target rib cage circumference is approximately 10 inches.

Comparing your result from the calculator with this table will allow you to answer the question posed at the beginning: "Is my cat overweight?" But what to do if the answer is yes?

Similarly to humans, maintaining a healthy cat weight helps prevent several health issues. Once you've decided to take action, you can use this cat weight calculator to check your cat's progress and see how far they have to go to reach the healthy range. With that being said, here are some things that you can do to help your kitten:

• Cut back on treats. Most cats will also appreciate other rewards, including playtime with you!
• If you would rather keep the treats, slightly reduce the amount of normal food. However, never starve your cat. "Crash diets" do not work well for both humans and pets. If you were a cat] you wouldn't enjoy this, would you?

❗ 🍫Remember, chocolate can be toxic to cats! Cat chocolate toxicity calculator talks about it in more detail.

• Replace dry food with canned, which tends to have higher carbohydrate and protein content. This will keep your cat fuller for longer. It will also prevent grazing - dry food to cats can be just what chips (or other snacks) are to us! If you'd like to check this yourself, try the dry matter calculator to compare some canned food with its dry counterpart.
• Play with your cat. You can think of it as a pleasant exercise for your fluffy friend and a way to burn excess calories.
• If you have two cats (or more), you may have to feed the overweight one in a separate room or keep the healthy-weight cat's food in a place out of the bigger cat's reach.

Bear in mind that this is just a guide. There may be various causes of excessive weight, so always make sure to consult your vet to rule out more severe conditions. You may also check the cat calorie calculator to get an idea of how much food it needs. It may be difficult to keep cats trim, especially if they prefer to stay indoors, but it's definitely worth the effort! It'll increase your cat's quality of life, too!