Dog Age Guides
These guides explain what the calculator is built on: how dogs age, what separates small and large breeds, and how to recognise your dog's life stages.
- Dog Years vs Human Years: What Does It Really Mean?Why the seven-year rule falls short, and what gives a more realistic picture.Read the guide →
- Why Do Dogs Age Faster Than Humans?Rapid growth, a short childhood and why large breeds age faster than small ones.Read the guide →
- When Is a Dog Considered a Senior?Typical senior age for small, medium, large and giant dogs.Read the guide →
- Small vs Medium vs Large vs Giant DogsHow the size classes differ in ageing, lifespan and senior age.Read the guide →
- Dog Lifespan by BreedLife expectancy and senior age for the breeds we cover in depth.Read the guide →
- Dog Life Stages: From Puppy to SeniorWhat defines each life stage, and when it begins.Read the guide →
- How the dog age calculation worksA full explanation of the model, what is based on veterinary guidance and what is our own estimate.Read the guide →
Calculate your dog's age
Choose a breed and age in the calculator to see the age in human years and your dog's current life stage.
Open the calculator