How Old Is My Dog In Human Years​?

One human year equals seven dog years, right? Nope … not anymore! Most of us work out our dog’s age on 7:1 ratio based on a formula that’s been around since the 1950s. But dog age calculators have evolved since then. So how old is your dog in human years​?

Dogs do age faster than us; that’s only natural given their shorter lifespans. But it’s not as basic as dividing the human lifespan by that of a dog. In this article, we get to the bottom of how to check your dog’s age in human years.

Dog age calculator: How to work out a dog’s age​

Okay, so how do answer the question: “how old is my dog in human years​?” Basically, it depends on their breed and size. Smaller breeds tend to live longer than larger ones, so their aging process is a bit different.

For example, a small dog like a Chihuahua may age more slowly during their early years, reaching what we might consider “middle age” around 7 to 10 years. In human years, they might be about 40 to 50 years old at that point. On the other hand, larger breeds like Great Danes can hit their senior years much sooner, often around 5 to 7 years old, which might equate to 40 to 50 in human years.

Here’s a general guideline to help you out:

Giant breeds (like Mastiffs or Great Danes): They age the fastest. In their first two years, they might age about 10-12 human years each, and then every year after can be about 8-10 human years.

Small breeds (like Dachshunds or Poodles): They age more slowly initially. For the first two years, each year equals about 12-15 human years. After that, each additional year is about 4-5 human years on the dog age calculator.

Medium breeds (like Beagles or Bulldogs): They tend to age more evenly. The first two years might add up to around 10-12 human years each. After that, each year is roughly 6-7 human years.

Large breeds (like Labradors or German Shepherds): These guys age more quickly. In the first two years, they may age about 9-11 human years each. After that, each additional year can be around 7-8 human years.

💡The more you know 💡 One explanation for how the 7:1 dog age ratio came about is that it’s based on old stats that humans live to about 70, and dogs to about 10 years.

Use our dog age calculator

If all of this is a bit confusing, just check your dog’s age using our chart below. The updated rule of thumb is that the first year of a dog’s life is roughly equivalent to 12 – 15 years.

After this the gap closes a bit and their second year is equal to about nine human years. By the third year and thereafter every dog year is calculated as roughly five human years with some give and take based on dog size.

What is the new dog age calculator based on?

So if the 7:1 ratio was worked out according to human lifespan vs dog lifespan, what is this new formula based on? According to the American Veterinary Medical Association:

“Cats and small dogs are generally considered ‘senior’ at seven years old, but we all know they’ve got plenty of life left in them at that age. Larger-breed dogs tend to have shorter lifespans compared to smaller breeds and are often considered senior when they are 5 to 6 years of age. The ‘senior’ classification is based on the fact that pets age faster than people, and veterinarians start seeing more age-related problems in these pets. Contrary to popular belief, dogs do not age at a rate of 7 human years for each year in dog years.”

The below video gives fascinating insights into dog gerontology:

Why a dog age calculator is important

Working out your dog’s age with our calculator is more than just a matter of interest, it can significantly influence how you care for them and understand their needs. Here’s why it matters:

Health monitoring

Understanding your dog’s age helps you keep an eye on their health. Different age groups have varying health concerns. For example, puppies require vaccinations and training, while senior dogs may need more frequent vet visits to catch age-related issues early. If you know their true age, you can better anticipate these needs.

Tailoring nutrition

Dogs of different ages have different nutritional requirements. Puppies need food rich in protein and calories to support their growth, while older dogs often require a diet lower in calories but high in fiber. Working out your dog’s age with our calculator allows you to choose the right food that keeps them healthy and energetic.

Adjusting exercise

As dogs age, their energy levels and mobility change. Young pups might have boundless energy, needing lots of playtime and exercise. In contrast, older dogs may prefer gentler activities, like leisurely walks or light play. Knowing their age helps you plan appropriate exercise routines that suit their physical capabilities.

Behavioural insights

Age can affect behaviour, too! Puppies are often more playful and curious, while older dogs may become more reserved or even grumpy as they deal with aches and pains. Understanding where your dog is in their life stages can help you manage their behaviour better and provide the right support.

Planning for the future

Working out your dog’s age with our calculator can help you plan for the future. You’ll be more prepared for potential health issues that may arise as they get older. This way, you can make informed decisions about their care, whether it’s considering treatments, adjusting their diet, or even making home modifications for their comfort.

Give them their best years with pet insurance

So now you’ve answered the question “how old is my dog in human years​” and know why it’s important. It’s all about making the best of the years with your pet.

Another important way to do that is by getting pet insurance.

With PD Insurance your pet is covered for hereditary conditions after the waiting period passes. This means that a broad range of genetic illnesses can be catered to – provided you get your plan before they develop.

With our month-to-month policy option, you’ll have total flexibility. That means no lock-in contracts and no cancellation fees. Buy your plan online and you’ll get one or more months of PD pet insurance FREE.