Printable Dog Age Chart

Last updated

This is a print-friendly version of our dog years to human years chart, built to fit on a single sheet of paper. It covers dog ages 1 through 20 across all four breed-size classes, using the same size-adjusted veterinary formula as our dog age calculator: the first year counts as 15 human years, the second adds 9, and every year after that adds 4 to 7 human years depending on adult size. Stick it on the fridge, tuck it into the puppy folder, or hand it to a client. Whatever you print it for, the numbers match what modern vet references use, and every figure is documented on our methodology page.

Dog age Small
under 20 lb		 Medium
20–50 lb		 Large
50–90 lb		 Giant
90+ lb		 Life stage
medium dogs
115151515Junior
224242424Junior
328293031Adult
432343638Adult
536394245Adult
640444852Adult
744495459Mature
848546066Mature
952596673Mature
1056647280Senior
1160697887Senior
1264748494Senior
13687990101Geriatric
14728496108Geriatric
157689102115Geriatric
168094108122Geriatric
178499114129Geriatric
1888104120136Geriatric
1992109126143Geriatric
2096114132150Geriatric

Formula: year 1 = 15 human years, year 2 = +9, then +4 (small), +5 (medium), +6 (large), or +7 (giant) per year.

dogsagecalculator.com

How to use this chart

Find your dog’s age in the left column, then read across to the column that matches your dog’s adult size class. Weight is the deciding factor: under 20 lb counts as small, 20–50 lb as medium, 50–90 lb as large, and over 90 lb as giant. For mixed breeds, use your best estimate of adult weight. Each column doubles as its own chart: the Small column is a complete small dogs age chart for ages 1 through 20, and the same goes for the rest. The life-stage column reflects medium-sized dogs; bigger dogs reach each later stage one to three years earlier, and our senior checker gives a size-specific answer in one click.

If your dog’s age falls between years (say, 18 months), the calculator on our homepage handles months precisely. And if you’re curious why the chart looks nothing like the old “multiply by 7” rule, the short answer is that the old rule was never right; the full story is in our myth-busting article.

Printing tips

The chart fits on one portrait page in every major browser, in full color on color printers and clean grayscale otherwise. Hit the print button above (or press Ctrl+P / Cmd+P), and the page automatically strips the navigation, buttons, and everything else you don’t need on paper. If your printer supports it, “fit to page” keeps the table comfortably inside the margins.