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The old "multiply by 7" rule is outdated. Dogs age rapidly in their first two years, then slow down. A 1-year-old dog is roughly equivalent to a 15-year-old human. A 2-year-old is around 24 in human years. After that, each dog year adds 4–5 human years depending on breed size — giant breeds age faster than small breeds. Our Dog Age Calculator uses the latest AKC and veterinary research to give you a breed-specific result.

Daily food intake depends on your dog's weight, age, activity level, and the caloric density of the food. A sedentary 30 lb dog needs far fewer calories than an active 30 lb working dog. Puppies need 2–3× more energy per kg than adults. Our Dog Food Calculator calculates your dog's Resting Energy Requirement (RER) and adjusts for their life stage and lifestyle so you can stop guessing and start feeding right.

Cats age much faster in their first two years than humans do. A 1-year-old cat is roughly the equivalent of a 15-year-old human; a 2-year-old cat is about 24. After that, each cat year equals roughly 4 human years. By age 10, your cat is the equivalent of a 56-year-old. Our Cat Age Calculator gives you an accurate feline-to-human age conversion instantly.

The best way to check your dog's weight at home is the rib test — you should be able to feel but not clearly see the ribs. Vets use a Body Condition Score (BCS) on a 1–9 scale, where 4–5 is ideal. Weight alone isn't enough: a 60 lb Labrador may be overweight while a 60 lb Border Collie is perfectly healthy. Our Dog BMI Calculator gives you a BCS estimate and ideal weight range for your dog's specific breed and frame.

A typical adult cat needs around 20 calories per pound of ideal body weight per day, but this varies significantly. Indoor, neutered, or less active cats need fewer calories — often 25–30% less than outdoor cats. Kittens need up to 2× the calories of adults. Obese cats need to be reduced gradually. Our Cat Calorie Calculator computes your cat's exact daily needs using the NRC and WSAVA formula.

Dog pregnancy (gestation) lasts approximately 63 days from the date of ovulation, or about 58–68 days from the date of first mating. The pregnancy has three trimesters of roughly 21 days each. Signs of labour include nesting, restlessness, and a drop in body temperature to below 99°F (37.2°C). Our Dog Pregnancy Calculator gives you the estimated due date, whelping window, and week-by-week development milestones.