👄 What do your dog's teeth look like?

Closest match to their mouth right now Breed size Dental care history

Flat-faced (brachycephalic) breed

Bulldog, Pug, Boston Terrier, Shih Tzu, etc. — eruption timing can be irregular

Estimated age range

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Confidence

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Dental stage

PuppyYoung adultAdultSenior

Based on tooth eruption and wear guidance from the Merck Veterinary Manual and common shelter/veterinary dental-aging charts. Individual dogs vary with genetics, diet and health — this is an estimate, not a diagnosis. A vet exam (and dental X-rays, if needed) is the most reliable way to age a dog.

🔍 For adult dogs: check these other age markers too

●Eye lens clarity — a bluish-gray haze (lenticular sclerosis) commonly starts around 7–9 years old.

●Coat graying — graying around the muzzle often begins in the middle years and increases with age, though it varies a lot by breed and coat color.

●Muscle tone and mobility — loss of muscle mass, stiffness, or slower rising from lying down suggests an older senior dog.

●Overall body condition — a vet exam combining teeth, joints, and bloodwork gives a far more reliable estimate than any single marker alone.

🏆 Why this estimator is different

🎯Shows a confidence level, not fake precision — puppy teeth are read as "High confidence," adult tartar/wear stages are honestly labeled "Medium" or "Low," instead of pretending one exact age is knowable from a mouth alone.
🐕Adjusts for breed size — toy breeds build tartar noticeably faster than large breeds at the same real age, so the same mouth can mean a different age depending on size. Most charts give one universal timeline.
🪥Adjusts for dental care history — a well-brushed mouth looks younger than it is, and a never-cleaned mouth looks older; this shifts the estimate accordingly instead of ignoring it.
🔍Points you to other age markers — eye lens clarity, coat graying, and muscle tone — for adult dogs where teeth alone are least reliable, rather than presenting teeth as the only signal.
🐶Precise puppy window — for dogs under ~6 months, tooth eruption stage narrows age to a period of weeks, matching veterinary dental-development charts.
🔒No sign-up, no data stored — everything runs in your browser only.

❓ Frequently asked questions

How can you tell a dog's age by their teeth?

For puppies, the eruption schedule is very consistent: baby teeth come in by about 6–8 weeks and are replaced by permanent teeth between roughly 3 and 7 months. For adult dogs, vets look at tartar buildup, yellowing, and wear patterns — a much less precise method that typically narrows age to within a few years.

How accurate is age estimation by teeth?

Very accurate for puppies — often within 1–2 weeks during the eruption period. For adult dogs, tooth wear and tartar are influenced heavily by breed, diet, chewing habits, and dental care, so estimates are typically only accurate to within several years.

Why do small dogs get tartar faster than large dogs?

Toy and small breeds tend to have more crowded teeth and are prone to faster plaque and tartar accumulation, so their teeth can look "older" than a large breed dog of the same actual age.

My rescue dog's age is unknown — what's the best way to estimate it?

Combine several markers: tooth wear and tartar, eye lens clarity, coat graying, and muscle tone, ideally alongside a veterinary exam. No single marker alone — including teeth — gives a fully reliable age for an adult dog.

🦷 Dog Teeth Age Estimator