Last updated: April 13, 2026

Dog BMI Calculator

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Table of contents

What is Dog BMI?

Dog BMI (Body Mass Index) is an adaptation of the human BMI concept for canines. It helps assess whether your dog's weight is proportional to their body size. While veterinarians more commonly use a Body Condition Score (BCS) on a 1–9 scale, BMI provides a quick numerical reference.

How it's calculated

We use the formula BMI = weight (kg) / height (m)², where height is measured at the shoulder (withers). The ranges differ from human BMI since dogs have vastly different proportions.

Measure from floor to the top of the shoulder blades.

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