We might wish our dogs could live forever, but the truth is they age much more quickly than we do. Some breeds also age faster than others, so understanding the average lifespan for your dog’s breed and size can help you give them the care they need.
Here’s what you need to know, plus how to keep your dog as fit and healthy as possible, for as long as possible.
The average life expectancy of a dog is around 11 years, but there’s considerable variation depending on their breed and size.
Smaller breeds typically live longer than larger ones, although genetics, health, exercise, vet care and nutrition can all influence how long a dog lives for.
Here’s a rough guide of the typical life expectancy for different sizes.
It’s often said that one human year is equivalent to seven dog years, but it’s not that simple. This calculation is now widely regarded as a myth, since it oversimplifies how dogs age.
Dogs mature much more quickly than humans during their first few years of life. By the time they’ve reached their first birthday, most dogs have reached physical maturity, roughly equivalent to a 15-year-old human.
After this, dogs tend to age at different rates, with their breed and size influencing how quickly they’re considered seniors. Large and giant breeds generally reach their senior years earlier than smaller breeds.
Use this table as a guide to how many dog years are one human year. Bear in mind these figures are approximate, because each dog ages differently.
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Dogs also age more rapidly when they’re young, reaching reproductive maturity earlier than humans do. So, while a conversion to human years can be interesting, the best way to help your dog stay happy and healthy for as long as possible is to care for their health and wellbeing.
From feeding your dog the right diet to knowing the signs of ageing, here are five ways to support your dog’s health throughout their life.
A balanced diet is essential for your dog’s wellbeing. This should be tailored to your dog’s breed, age and activity levels, so if you’re unsure where to start, speak to your vet for advice.
If you have dog insurance with Petplan, you can also use our Pet Expert Chat feature to speak with vet professionals by logging in to your My Petplan account and heading to the My Support area.
Your dog’s food should also be suitable for their specific life stage, so their age will determine whether you’ll be feeding them a puppy, adult or senior formulation. Avoid feeding fatty table scraps and remember to subtract the calories of any treats from your dog’s daily ration, so they don’t end up overweight.
Physical and mental stimulation are essential for keeping your dog’s body – and mind – active. How much exercise your dog needs will depend on their breed, fitness levels, health and age.
Aim for a blend of physical exercise like walking, plus mental stimulation like training sessions and games. Puzzle feeders and lick mats are also a great way to keep your dog mentally stimulated while you're out of the house.
Obesity in dogs is becoming more common, with research from the PDSA finding that vet professionals estimate that 46% of dogs in the UK are obese or overweight. But extra weight can contribute to a wide range of health conditions, including heart disease, diabetes and arthritis, which may impact your dog’s lifespan.
The best way to monitor your dog’s weight is using body condition scoring (BCS), something that’s easy to learn and can be included in your daily routine.
Dental problems are common in pets, making oral hygiene incredibly important. Many dogs show signs of gum disease as early as four years old. This can be down to a combination of issues, including the wrong diet, a lack of suitable chew toys and minimal dental care.
One of the best ways to prevent dental problems like gum disease is by regularly brushing your dog’s teeth. Ideally, you should start brushing your dog’s teeth when they’re a puppy, and gradually build this process into their routine. But if your dog is older, starting to brush their teeth at any age can make a big difference to their oral health.
Proactive health checks, like annual checkups, mean it’s easier to catch any minor health issues as soon as possible. Your vet can then develop a tailored plan to support your dog.
Make sure your dog also receives annual vaccinations and medications for parasites such as fleas, ticks and worms.
Petplan’s veterinary expert, Dr Brian Faulkner, comments:
“While these five tips might seem straightforward, our recent 2026 Dog Breed Report reveals an interesting disconnect: nearly half of dog owners (44%) state their number one concern for caring for their dog in 2026, is keeping them healthy and active."
“A dog’s age, existing health conditions, weight, and breed are all key factors in how long a dog should be exercised for. For instance, puppies require frequent, short bursts of play to protect developing joints, whilst senior dogs might need gentler, and low-intensity exercise."
“As a general guide, we recommend around 30 minutes daily for small breeds like Yorkshire Terriers and Chihuahuas; approximately one hour for medium-sized breeds such as Labradoodles. For particularly energetic breeds including Spaniels, Collies and Staffordshire Bull Terriers, we recommend one to two hours of daily exercise; and a minimum of two hours for large breeds such as Labradors and German Shepherds."
“It’s important to note that each dog is different and their routines will differ with time too. Simple, everyday things can make a huge difference to our pet’s lives such as regular exercise. As humans we also reap the health benefits of regular walks, but for our dogs it can help offer mental and social stimulation, as well as reducing boredom to help ensure a calmer dog at home."
“Early intervention is key to addressing any potential health issues. And if those vet visits become necessary, having dog insurance can provide invaluable peace of mind.”
Learn how to perform a dog MOT at home with Dr James Greenwood in the video below
Because dogs are individuals, they also age at different rates. It’s important to know the signs of ageing, so you can support your dog in the right way. Watch out for:
Ageing is a natural process and something to be celebrated. Throwing your dog a birthday party is a fun way to honour the joy they bring to your life, and the perfect excuse for homemade treats and games.
If you have dog insurance with Petplan, you can also use our Pet Expert Chat feature to speak with vet professionals from the comfort of your own home. Simply log in to your My Petplan account and head to the My Support area.
* Source: Petplan claims data, 2025.
The average life expectancy for domestic dogs is 11 years, although this varies depending on a dog’s size and breed. Large and giant breeds typically don’t live as long as smaller breeds.
It was previously widely assumed that one dog year equalled seven human years. But that calculation is now considered outdated, because dogs of different sizes and breeds age at different rates. Dogs also mature quickly for the first year of their life, then the ageing process slows down.
Petplan is a trading name of Pet Plan Limited (Registered in England and Wales with company number 1282939) and Allianz Insurance plc (Registered in England and Wales with company number 84638).
Pet Plan Limited is authorised and regulated by the Financial Conduct Authority. Financial Services reference number 311969. Allianz Insurance plc is authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority, reference number 121849. Registered address: 15 Bishopsgate, London, EC2N 3AR.
