Beyond the 7-year myth

Your dog's real age, life stage, and time ahead.

FurTimer turns age, breed size, body condition, activity, dental care, and health context into a warm, shareable dog lifespan profile.

Private in your browserBreed-size lifespan rangesVet-informed guidance
Calculate your dog's ageRead the science

Age formula

16 ln(age) + 31

Profiles

20+ breed types

Output

Share + PDF

happy dog running outside for a dog age calculator result

Example

Max, age 4

FurTimer result

A richer dog age estimate

Adult

54

human years

10-14

lifespan

93

care score

See human years, life stage, lifespan range, next care steps, and a downloadable PDF.

How it works

Build a richer dog age and lifespan profile

FurTimer is designed to make dog years to human years easier to understand. Learn more about the science and mission on the About FurTimer page.

1

Choose a starter profile

Tap a realistic example or start with the prefilled default profile.

2

Add health context

Include size, body condition, activity, dental care, and chronic-condition context.

3

Share or download results

Get human age, life stage, lifespan range, share text, and a polished PDF report.

FurTimer passport

Build your dog's time profile

A guided, private-in-browser profile that blends dog years, lifestyle, care habits, and size-aware lifespan context.

Auto-savedPrivate in browserPDF ready

Quick launch

Start with a real-world scenario

Choose a starter profile, then adjust only the details that matter for your dog.

Optional

Identity

Who are we timing?

Start with the dog basics. Breed profile can suggest a size automatically, but you can still override it.

Step 1

Lifestyle and care

What shapes the years?

These inputs refine the wellness context. They do not diagnose health, but they make the estimate more useful.

Step 2

Often the biggest factor for older dogs. Choose the option that matches the current medical reality, not the most optimistic one.

Ready for the estimate?

You can download a PDF report after the result appears.

Your result will appear here

You'll see human years, life stage, lifespan range, and a shareable message.

The science

Why Not Just Multiply by 7?

The 7x rule treats dog aging like a straight line. Real dogs mature quickly in early life, then age along a curve shaped by size, genetics, and health.

Read the full explanation

16 ln(age) + 31

Logarithmic formula

4 sizes

Life stage filters

12 guides

Original SEO articles

Life stages

From puppy zoomies to senior comfort

Puppy

Growth, vaccines, social learning, and gentle routines.

Adult

Steady energy, preventive care, training, and fitness.

Mature

Subtle aging signals, weight checks, and smarter exercise.

Senior

Comfort, mobility, dental care, and more frequent check-ins.

Loved by dog people

Warm, useful, and easy to understand

Woman smiling with her dog
"I always used the 7-year rule. FurTimer made Milo's stage make so much more sense for his vet visit."
Alyssa and Milo
Dog owner holding a small dog
"The size-based lifespan range helped us understand why our tiny rescue still acts younger than her birthday."
Ben and Olive
Large dog standing beside owner outdoors
"Bruno is a giant breed, so seeing senior care explained early was genuinely useful and not scary."
Priya and Bruno

Latest guides

Helpful reading for every dog life stage

Source-informed guides that connect your calculator result with lifespan, senior care, diet, exercise, dental health, and better vet conversations.

View all articles

Start here

Not sure what to read?

Calculate your dog's profile first, then use the result to pick the most relevant guide.

Try the calculator ->

FAQ

Dog age questions, answered clearly

Short, direct answers help both readers and search engines understand the calculator.

FurTimer uses the logarithmic formula human age = 16 ln(dog age) + 31, then adds breed-size life stage and lifespan context.