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 a dog per day: resting energy from weight, the WSAVA life-stage factor shown, then grams and cups from the bag’s own kcal figure. Treats and weight loss handled.
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
Dog due date as a window (58–68 days from mating, 62–64 from a progesterone-dated ovulation) with first and last mating, dated milestones and the days to call the vet.
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.
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.