Home & Life

Pets & Animals Calculators

Pet age, food, water, medication by weight and animal care. Free calculators with formulas and worked examples.

Pets

Dog Age CalculatorHow old is your dog in human years? Two methods side by side.Cat Age CalculatorSee where your cat sits in human terms.

Feeding

Dog Food Calculator (Calories and Cups per Day)Enter your dog's weight, life stage and the food's calories to find the daily portion.Cat Food Calculator (Calories, Wet and Dry Food)Enter your cat's weight, life stage and the foods' calories to plan daily feeding.Dog and Cat Weight Loss Calculator (Safe Rate and Calories)Enter your pet's current and ideal weight to plan a safe weight-loss programme.Raw Dog Food Calculator (Daily Amount by Body Weight)Enter the dog's weight and the feeding percentage to get the daily raw food amount.

Pet safety

Chocolate Toxicity Calculator for Dogs (Theobromine Dose)Enter the dog's weight, the chocolate type and how much was eaten. If in doubt, call your vet or a pet poison line now.

Breeding

Dog Pregnancy Calculator (Whelping Due Date)Enter the breeding date to estimate when the puppies are due.Animal Gestation Calculator (Due Date for Pets and Livestock)Choose the species and enter the breeding date to estimate the birth date.

Horses

Horse Weight Calculator (Girth and Length Tape Method)Measure heart girth and body length with a soft tape to estimate your horse's weight.

Fish

Aquarium Volume Calculator (Litres, Gallons and Weight)Enter your tank's inside dimensions to get its volume and weight.

Ownership

Pet Cost Calculator (Yearly and Lifetime Cost)Enter your expected costs to see what a pet will cost each year and over its lifetime.Pet Insurance Calculator (Payout and Break-Even Vet Bill)Enter the policy terms and a vet bill to see what you get back.

About these calculators

Practical numbers for pet owners: age in human years, daily food and water, calorie needs, and costs of ownership. These are general estimates; your veterinarian's advice comes first.

Each calculator explains its formula, includes a worked example and lists its sources. Read how we check them on our editorial policy page, or browse all calculators.

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Please note: TheCalcTools gives general estimates for information and education. It is not financial, medical, legal or tax advice, and results should be checked before you make a decision. See our disclaimer and about page.