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Dog BMI Calculator

Calculate your dog's FBMI score and find out if it is over- or underweight

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๐Ÿ‡ฉ๐Ÿ‡ฐ All calculations are based on Danish rules, rates, and currency (DKK). This calculator is translated for convenience but applies exclusively to Denmark.

Dog BMI calculator โ€“ is my dog overweight?

Like humans, dogs can be over- or underweight, and this can have serious consequences for their health. Our calculator uses the FBMI method (Feline/Canine Body Mass Index) to give you an objective assessment of your dog's body composition based on simple measurements you can take at home.

What is FBMI?

FBMI (Body Mass Index for animals) is a method for assessing whether an animal has a healthy weight relative to its size. Unlike human BMI which only uses height and weight, dog FBMI uses chest circumference and shoulder height to calculate a score. An FBMI score below 15 indicates underweight, 15-24 is normal, 25-34 is overweight, and above 34 is severely overweight.

How to measure your dog

To use the calculator, you need to take two measurements on your dog. Chest circumference is measured around the dog's ribcage at the widest point, typically just behind the front legs. Shoulder height is measured from the floor to the top of the shoulder blade while the dog stands still on a flat surface. Use a flexible measuring tape and make sure the dog stands relaxed and natural.

What to do with the result

If your dog scores in the normal range (15-24), it is in good shape. Continue with the current diet and exercise. If the score indicates overweight (25-34), consider reducing food by 10-15% and increasing daily exercise. For severe overweight (above 34), contact your vet for a professional assessment and weight loss plan. Underweight dogs (below 15) should also be examined by a vet to rule out underlying diseases.

Limitations of FBMI

FBMI is a useful screening tool but has limitations. Very muscular dogs may get a high score without being overweight, and certain breeds with unique body proportions (like Dachshunds or Greyhounds) may give misleading results. FBMI should always be supplemented with a vet's professional Body Condition Score assessment for a complete picture of the dog's health.

Frequently Asked Questions

What is a normal FBMI score for a dog?

A normal FBMI score for a dog is between 15 and 24. Below 15 suggests underweight, 25-34 indicates overweight, and above 34 is severe overweight. Most healthy dogs score between 18 and 22. Remember that FBMI is a screening tool and should be supplemented with a vet's assessment.

How do I correctly measure my dog's chest circumference?

Let the dog stand calmly on a flat surface. Wrap a flexible measuring tape around the dog's ribcage at the widest point โ€“ typically just behind the front legs. The tape should sit snug against the coat without being tight. Read the measurement in centimetres. For the most accurate result, take the measurement 2-3 times and use the average.

Does FBMI work for all dog breeds?

FBMI works best for breeds with average proportions. Breeds with unusual body proportions โ€“ such as Dachshunds (long body, short legs), Greyhounds (very lean) or Bulldogs (wide chest) โ€“ may give misleading results. For these breeds, it is recommended to supplement with a vet's Body Condition Score assessment for a more accurate picture.

What percentage of dogs are overweight?

Studies show that up to 40-50% of dogs in Western countries are overweight or obese. It is estimated that about 35-40% of all dogs have some degree of overweight. The most susceptible breeds include Labrador, Golden Retriever, Cavalier King Charles Spaniel and Beagle. Obesity can shorten a dog's lifespan by up to 2 years.

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