How Old Is Your Dog, Really?

Stop multiplying by seven. Use actual science — breed size, DNA methylation data, and veterinary research — to find out your dog's true human age.

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Our Tools

Everything you need to understand your dog's age, health, and life stage — built on real research, not internet myths.

Why DogAgeTool Is Different

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Real Science
Based on UC San Diego DNA methylation research, not some blog post from 2008. We cite our sources and update when new studies come out.
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200+ Breeds
From Chihuahuas to Great Danes. Each breed has its own aging curve built in. No more one-size-fits-all nonsense.
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Instant Results
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Zero Tracking
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From the Blog

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Rapamycin for Dogs: What the TRIAD Study Actually Found | DogAgeTool Blog
Research
Rapamycin for Dogs: What the TRIAD Study Actually Found | DogAgeTool Blog
The TRIAD study tested rapamycin on 580 dogs. Cardiac improvements were real, but lifespan data is still years away. Here's what vets actually think.
August 23, 2026 ⏱ 10 min ✍ Morrison
Your Dog's Gut Microbiome Is Aging Faster Than You Think | DogAgeTool Blog
Research
Your Dog's Gut Microbiome Is Aging Faster Than You Think | DogAgeTool Blog
Your dog's gut contains 100 trillion microorganisms. As they age, inflammation rises and diversity drops. Here's what the science says.
August 22, 2026 ⏱ 10 min ✍ Morrison
I Put My Overweight Lab on a Diet and Learned Obesity Ages Dogs at the Cellular Level | DogAgeTool Blog
Research
I Put My Overweight Lab on a Diet and Learned Obesity Ages Dogs at the Cellular Level | DogAgeTool Blog
Cooper was 8kg overweight. I thought he was big-boned. Then I learned obesity shortens telomeres and accelerates aging. Here's what I did.
August 21, 2026 ⏱ 10 min ✍ Morrison
Senior Dog Vaccines: My Vet and I Disagreed (Again) | DogAgeTool Blog
Research
Senior Dog Vaccines: My Vet and I Disagreed (Again) | DogAgeTool Blog
Should senior dogs get the same vaccines as puppies? Titer testing, duration of immunity, and what the research actually says.
August 20, 2026 ⏱ 10 min ✍ Morrison
My Beagle's Breath Smelled Like Fruit and It Was Almost Too Late | DogAgeTool Blog
Research
My Beagle's Breath Smelled Like Fruit and It Was Almost Too Late | DogAgeTool Blog
Biscuit's breath smelled like nail polish remover and apricot jam. It was diabetic ketoacidosis. Here's what I missed and what saved her.
August 19, 2026 ⏱ 10 min ✍ Morrison
I Thought My Dog Had Food Allergies. Turns Out It Was Seasonal Allergies All Along. | DogAgeTool Blog
Research
I Thought My Dog Had Food Allergies. Turns Out It Was Seasonal Allergies All Along. | DogAgeTool Blog
I spent $400 on an elimination diet. Eight weeks later, Luna's paws were worse. The real culprit was pollen.
August 18, 2026 ⏱ 10 min ✍ Morrison