Pet calculators
Dog and cat questions with a number for an answer — age, feeding, weight, growth, pregnancy and cost — each showing the formula it used and the veterinary source it came from. Educational estimates, not veterinary advice.
Dogs
Dog Age Calculator
Convert dog years to human years two ways: the size rule vets use (15, +9, then 4–7 a year by size) and the 2020 DNA study formula 16 ln(age) + 31. Shows the life stage and when a dog counts as senior.
Dog Food Calculator: How Much to Feed Your Dog (Cups, Grams)
How much to feed your dog per day in cups and grams, from weight and life stage, using your bag’s own kcal figure. Covers puppies, treats and weight loss.
Puppy Weight Calculator
How big will your puppy get? Adult weight from current weight, age in weeks and breed size by the percentage-of-adult-weight method behind growth charts, always as a range.
Dog Ideal Weight Calculator
Turn a 9-point body condition score into an ideal weight (10–15 % per point, Laflamme) and a safe weight-loss timeline at 1–2 % a week. Hands-on, not breed averages.
Dog Pregnancy Calculator: Due Date & Week-by-Week Calendar
Enter the mating date to get your dog’s due date window (58–68 days), a week-by-week pregnancy calendar, how far along she is and when to call the vet.
What Dog Should I Get?
Answer 11 questions about your home, household, time and budget and get dog breeds ranked with every score explained — registry facts, published lifespans and a 13,700-dog behaviour study, no invented ratings.
Puppy Vaccination Schedule Builder
Build a dated puppy vaccination schedule from birth date: core shots, booster reviews, rabies discussion and deworming reminders. Confirm dates with your vet.
Dog Chocolate Toxicity Calculator
Estimate combined theobromine and caffeine exposure from dog weight, chocolate type and amount. Call your vet or a pet poison line for advice.
Puppy Feeding Calculator
Estimate puppy calories and food grams from age, weight and the label. Includes a puppy feeding chart, treat allowance and portions per meal.
Dog Heat Cycle Calculator
Project your dog’s next heat date from the last start and usual interval. Calendar estimates with visible assumptions, veterinary sources and no fertility claims.
Puppy Water Intake Calculator
Estimate a weaned puppy’s water range by weight in mL, US fluid ounces and cups. Sourced guidance with clear limits: never ration water to the result.
Cats
Cat Age Calculator
Convert cat years to human years by the veterinary convention (15, +9, then +4 a year) with the AAFP/ISFM life stage named. Accepts months for kittens.
Cat Food Calculator
How much to feed a cat per day with feline factors (not the dog table): resting energy from weight, the WSAVA factor shown, grams and cups from the bag’s kcal figure. Mix wet and dry: cans per day from the label.
Cat Ideal Weight Calculator
Turn a 9-point body condition score into an ideal weight and a safe feline weight-loss timeline (0.5–1 % a week, because faster risks hepatic lipidosis).
Cat Pregnancy Calculator
Cat due date from the mating date: 63–65 days typical, 58–72 possible, with dated milestones (pinking up, ultrasound, X-ray) and the day to call the vet. Shows how far along she is today.
Kitten Feeding Chart
Find kitten feeding stages by age and calculate portions for fully weaned kittens. Newborn care guidance, label-based grams, meals and veterinary sources.
Dogs and cats
Also plan puppy vaccination dates, puppy food portions, kitten feeding stages, approximate heat dates and puppy water needs with the tools above.
For possible chocolate ingestion, the dog chocolate toxicity calculator shows exposure context and directs you to your vet or a pet poison line.