Weight & Growth Animal Calculators
Body weight estimators, heart girth equations, puppy growth curves, average daily gain (ADG), and body condition scores.
Keeping track of your animal’s weight is essential, whether you are watching a puppy grow, helping an overweight cat slim down, or figuring out how much dewormer your horse needs. Since it isn’t always easy to get a 1,000-pound horse or an active cow onto a scale, horse owners and farmers have long used simple tape measurements around the chest to estimate weight accurately. For our dogs and cats at home, a number on the scale is only half the story. That’s why hands-on checks like Body Condition Scoring (checking how easily you can feel their ribs and see their waistline from above) help you see if your pet is at a healthy shape or carrying a few extra pounds.
Available Weight & Growth Tools11 Calculators
Puppy Weight & Adult Dog Size Predictor
Estimates adult dog weight and projected mature size based on current age, weight, and breed size group using validated growth curves.
Dog Body Condition Score (BCS 1–9) & Ideal Weight Tool
Evaluates your dog's body condition on the 9-point WSAVA scale and calculates estimated ideal target body weight.
Dog Weight Loss Target Date & Calorie Planner
Calculates the safe timeline, target date, and daily caloric deficit required for healthy dog weight loss.
Cat Body Condition Score (BCS 1–9) & Ideal Weight Tool
Evaluates your cat's body condition on the 9-point WSAVA scale and calculates estimated ideal target body weight.
Cat Weight Calculator & Feline Body Mass Index (FBMI)
Calculates your cat's target body weight, body fat %, and daily calorie adjustments using body measurements and BCS.
Horse Weight Calculator (Heart Girth & Length)
Calculates horse body weight in kilograms or pounds from heart girth and body length tape measurements.
Cattle Weight Calculator (Shaeffer's Equation)
Calculates beef and dairy cattle body weight in pounds or kilograms from heart girth and body length measurements, with carcass yield estimates.
Sheep & Lamb Weight Calculator
Calculates sheep and lamb body mass in pounds or kilograms from heart girth and body length measurements.
Calf & Cattle Average Daily Gain (ADG) Calculator
Computes rate of gain over a defined feeding period in pounds or kilograms per day.
Goat Weight Calculator (Heart Girth Formula)
Calculates goat body weight in pounds or kilograms from heart girth and body length measurements.
Rabbit Breed Size & Ideal Weight Calculator
Compares your rabbit's scale weight against ARBA breed standard adult weight classifications.
Frequently Asked Questions: Weight & Growth
How accurate is measuring an animal with a weight tape?
When you wrap a soft measuring tape snugly around the chest right behind the front legs while the animal stands squarely on level ground, it usually estimates their real scale weight within about 3% to 5%.
Why is growing too fast risky for large and giant breed puppies?
If large puppies eat too many calories and gain weight too quickly, their heavy bodies can put too much stress on soft growing bones and joints, leading to painful joint problems later in life.