by Emily Dickson Collaborator

# What’s My Horse’s Age in Human Years?

*Hint: It’s more than a horse teeth age chart*

There’s a lot of information out there about your dog’s age in human years. Science has determined that it’s a little more complicated than the common knowledge of multiplying by 7

Turns out, it’s a little more complicated when it comes to calculating your horse’s “human age” too.

Obviously, horses and humans mature at different rates. For example, a newborn foal should stand up and walk within 3 hours of being born, in comparison to human babies, which only begin walking at about 1 year of age!

How do you calculate a horse’s age in human years?

There’s not just one chart or age calculator to answer this question, as each horse is an individual, so it’s important to not take this too seriously!

Even so, one estimate that equine veterinarians have come up with for determining a horse’s age in human years is this (1):

• 6.5 human years for each horse year from birth to age 4
• 2.5 human years for each horse year starting at age 4

Let’s say your horse is 15 years old.

6.5 x 3 years = 19.5 human years

2.5 x 12 years = 30 human years

Your 15-year-old horse is 49.5 in human years! Time to start planning that big milestone birthday party...

Average Age of a Horse

The average lifespan of a domestic horse is between 25 and 33 years. Different factors play into this, including nutrition, management, breed, size, etc.

Smaller horse breeds (like ponies) typically mature faster and have a reputation for living longer, sometimes into their 40s (in horse years!), while larger breeds (like Warmbloods) typically require more time for maturation and development.

At what age is a horse considered a senior?

Some experts make the cut-off at 20 years old, however, many equine nutritionists consider older horses “senior” when they have trouble maintaining body condition on their normal diet of hay and grain. This usually happens due to dental issues (horses having a hard time chewing hay as they age).

Senior horse feeds are typically complete feeds, meaning that they contain forage, and are designed to be fed as a stand-alone diet, without hay.

If your horse is still able to chew well, eat hay, and maintain their body condition, don’t worry about the “cut-off” age. Your horse’s age is just a number after all. Keeping the horse on a diet that is closest to nature for as long as possible is the best way to maintain quality of life.

Healthy as a Horse: Extending the Number of Horse Years

It’s not just about calculating horse age in human years or the lifespan of a horse; it’s about extending the life in your horse’s years! So how can you promote healthy horse aging?

1. Feed your horse at an optimal rate at every stage, according to their exercise level, phase of development, and weight. Overfeeding can lead to developmental diseases in young horses that affect the horse’s performance for their entire lives and can have negative consequences such as laminitis, insulin resistance, and potentially colic, as the horse ages.
1. Regular equine management practices. Prioritize annual preventive measures, including vaccinations, dental care, and regular deworming, which all play a major role in your horse’s longevity. And don’t forget that keeping your horse on a consistent farrier schedule is critical for hoof and joint health.
1. Protect the gut microbiome. Many horses' lives are cut short due to digestive problems, which can happen at any age. We’ve all heard the horror stories. One of the best preventive care measures you can take as a loving horse owner is to feed your horse a high quality equine probiotic supplement.

Your horse’s age in human years is less important than their quality of life. Before you pull out the teeth aging chart or horse age calculator, follow these steps and they’ll be aging backwards in human years before you know it!