Calculating Age in Dog Years

A popular misconception is that dogs age 7 years for each calendar year. In fact, canine aging is much more rapid during the first 2 years of a dog’s life.

After the first 2 years the ratio settles down to 5 to 1 for small and medium breeds. For large breeds the rate is 6 to 1, and for giant breeds the rate is 7 to 1. Thus, at 10 years of age a Great Dane would be 80 years old while a pug would only be 64.

Calculating Age in Dog Years

Chapter 7: Dog Growth & Development

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I love the wheel chart to calculate a dog's age. Much better than the old 7-1 ratio you always hear about.

barked by Curly Jean on Mar 20, 2008 AT 5:39 pm PDT
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Nice chart- this is very helpful...thanks fur the updatse, Dogster!!! =)

barked by Courtney O. on Apr 6, 2008 AT 10:16 am PDT
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This is so awesome and vary helpful. I can not believe my baby is almost 14 in dog years.

barked by Lindy Herbel on Apr 21, 2008 AT 11:23 am PDT
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On July 4th of this year my Dexter would have been 19 years old in our age or 129 in dog years , but on June 16th our family will gather togetheras he makes is journey from this world to the next to wait for me there.

barked by Lynda Leonard on Jun 7, 2008 AT 8:04 pm PDT
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That's very cool! Daisy would be turning about 44 in July!

barked by Molly on Jun 26, 2008 AT 2:15 pm PDT
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Wow! Thanks Dogster! That means that my dogs are between the ages of 16 and 87!

barked by Meredith Mapes on Jun 26, 2008 AT 4:19 pm PDT
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awww! My babies are growing so fast! Already about eight in dog years!!!

barked by Lauren Wedgeworth on Jun 26, 2008 AT 5:58 pm PDT
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Tomorrow is Sebastian birthday... he will be 16!!! and he will have his "first year" cake in human's years...

barked by Claudia Olvera on Jun 26, 2008 AT 6:32 pm PDT
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WOW! Way cool. I have one older than me, one the same age, and 2 younger! Cool.

barked by SUZANNE SARLLS-HARTWELL on Jun 26, 2008 AT 6:52 pm PDT
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This has helped us! We'd always heard about the 7:1 ratio, and had even heard of 10:1 on the first year then 7:1 each additional year. I personally think Dogster knows what they're talking--oops--barking about. Keep up the good work! We Love Dogster!

barked by Ted's Mom on Jun 26, 2008 AT 7:42 pm PDT
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Wow! This is really nice!

barked by Tori Straughn on Jun 27, 2008 AT 7:27 am PDT
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No wonder Skooter has been a pill lately. She's 16 in human years! My little "teenager"! This was helpful & fun!

barked by Char Barr on Jun 27, 2008 AT 12:55 pm PDT
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My dog is older than I thought...he's 54 years old and that's the age on my Mom...lol

barked by Vikki Hill on Jun 27, 2008 AT 3:15 pm PDT
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Oh wow. My little Gabby is 14 years old in dog years. Well, lucky for me she's small and she ages the slowest. Lol. She'll always be my baby girl. Thanks Dogster! This will be way better for charting down dogg-year ages! We love you, Dogster!~

barked by Cecelia on Jun 27, 2008 AT 5:27 pm PDT
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Wow so easy you have think about it for a minute. thanks Dogster !!!

barked by Martha Brimhall on Jun 27, 2008 AT 6:36 pm PDT
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GREAT way to calculate dog age, but it would be even more helpful if the SMALL, MEDIUM, and LARGE categories were more precisely delineated by weight . Just a thought...

barked by catherine on Jun 28, 2008 AT 2:23 am PDT
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Thanks Dogster! My JRTs are 20 and 34 yrs old already! I can't bear the thought of losing them! Anyways, aside from the chart, calculating a dog's age is also dependent on several factors such as their environment, diet, weight, several health issues, etc.

barked by Leila Earnshaw on Jun 28, 2008 AT 10:45 am PDT
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Wow, so simple! great, quick, easy, whats not to like?! athough i do agree with catherine slightly! Thanks dogster! i will be printing this out to keep!

barked by Alana on Jun 30, 2008 AT 7:46 am PDT
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love this!

barked by Lexanne Benson on Jul 1, 2008 AT 10:30 am PDT
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Good info,glad it's been updated,after all these year's. Thank's for sharing,very interesting.

barked by gail rock on Jul 1, 2008 AT 8:10 pm PDT
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Good chart- I found this chart helpful in that you realize that is might not be easy to calculate your dong's age without realizing all of the factors in it so good job Dogster!

barked by Chelsea on Jul 2, 2008 AT 7:37 am PDT
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Oh goodie- this means that my Little boy is the same age as me! Does this mean I can take him out for drinks with the girls? Heehee.

barked by Cash on Jul 2, 2008 AT 4:33 pm PDT
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I like the chart as it seems a bit more accurate, the problem I have is figuring out whether or not my 100 lb. dog is L or XL, or my 50 lb. dog is M or L. My 100 lb dog is 10 years old and the difference between L and XL is significant. Can you offer a little more guidance in size?

barked by Magnolia South on Aug 9, 2008 AT 4:52 pm PDT
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I love this chart!! Although I don't like it that in February my baby will be older than me according to the chart! My baby is growing up so fast!

barked by Megan on Dec 16, 2008 AT 7:08 am PST
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Just love the chart strait forward info you can understand pawsome =}

barked by Tammy Cole on Feb 24, 2009 AT 2:46 pm PST
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I am a boxer weighing in at 84 lbs....so I say I am a large breed as opposed to the "Giant Breeds" which would be extra-large. So I am now 5 human years old which makes me 42 dog years.....when I turn 6 human years in July I will then be 48 dog years - Great tool Dogster!!!!!

barked by Justus on Feb 24, 2009 AT 3:03 pm PST
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Kaya is about 87! Neat wheel!

barked by Kaya on Feb 25, 2009 AT 3:01 pm PST
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I can't believe that my little Rita is 54. Tiger is about 42, but will catch up to Rita because of her size. Its amazing!

barked by Jody Gawinski on Feb 25, 2009 AT 4:43 pm PST
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wow...already at six years of age, my baby girl Maggie is as old as my dad!..and in June she will be older...wow, that's just amazing,,,thanks Dogster

barked by Amanda Publiski on Feb 26, 2009 AT 6:12 am PST
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My baby is going to be 29 a week from today!!! Thanks Dogster!!!

barked by Hope on Feb 26, 2009 AT 2:59 pm PST
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Cool!

barked by sharon hallam on Feb 26, 2009 AT 6:34 pm PST
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I appreciate this insight. Was very helpful to me, I have one senior dog and 1 3 yr old dog and this helps put things in perspective. Thank you!

barked by Blankiez & Ballz 4 Pawz on Feb 27, 2009 AT 7:12 am PST
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this is great!! I love this chart. This explains it all about my little Lila Rae-- she's a 16 year old FEMALE!!!! ; )

barked by Deanie on Feb 27, 2009 AT 10:37 am PST
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this is really great!!!! thanks for everything dogster!

barked by heather stone on Feb 28, 2009 AT 6:51 pm PST
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Sweetness!! Hershey is 24, hes a young man!!!!!

barked by Katie B. on Mar 2, 2009 AT 4:52 am PST
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This is a very helpful comment! I swear! It helped me a lot! :)

barked by ronette lasin on Mar 2, 2009 AT 5:53 am PST
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Kubbi is a young 90!

barked by Linda Davidson on Mar 2, 2009 AT 12:59 pm PST
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haha, I have a teenager...lol my roxie is a teenager,,

barked by amy shackley on Mar 3, 2009 AT 10:41 am PST
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Quirk BooksThe Dog Owner's Manual is a basic guide to dog care.
The book was written by a celebrated veterinarian and an acclaimed author. It provides dog owners with well-researched and helpful information presented in a lighthearted manner. The creators chose to write the book in a style similar to what you'd find in "operating instructions" for a car or computer. Of course they--and we--respect the fact that our beloved pets are not products or machines!