Pet Calculators
4 tools for cat and dog age and pregnancy tracking.
A Numeric Guide for Cat and Dog Owners
The cat and dog age calculators do not use the folk rule that one animal year equals seven human years. They use veterinary curves that account for fast maturation in the first two years and, for dogs, breed size (small breeds age more slowly, giant breeds faster). That is why a 3-year-old Chihuahua and a Great Dane of the same age have different human-age equivalents.
The pregnancy tools estimate the delivery window from the mating date: 63-65 days on average for cats and 58-68 days for dogs. The result is a range, not a single day. As the date gets closer, read signs such as reduced appetite and nesting alongside the window.
These tools do not replace veterinary care. Ultrasound gives definite pregnancy information, and age estimates should be read together with dental and general health checks. Keep up regular vet visits.