NOTE: The minimum valid age for a dog when using the K9 to human routines is 5 years. Whilst the routines may return what appear to be valid results for K9 ages less than 5, it is more likely that they will not be valid. The same is true for the routines converting human to K9 years. This is based on the source of the data being the "The Senior Dogs Project" (see below) and not a more general website. Thank you for your understanding.

Index

Note: The original "Senior Dogs Project" website uses imperial weights - that is, "Up to 20 lbs", "21-50 lbs", "51-90 lbs" and "Over 90 lbs". I've converted these to metric using 1Kg = 2.204622622lbs and rounded to one decimal place. Also note that the weights in pounds are rounded to the nearest integer.

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References and General Comments

The following calculations are based on equations arrived at from creating an Excel spreadsheet from data obtained from the website "
The Senior Dogs Project" (TSDP), converting the data to a series of scatter graphs and then determining the equations for the lines of best fit. The specific data used is located on the page http://www.srdogs.com/Pages/care.gt.html under the first heading, "Aging Signs". Other topics covered in this section of the TSDP website include: A copy of the Excel spreadsheet (Excel 2003) file is available here.
Click here to see the "A_Dog's_Age_in_Human_Years" Excel spreadsheet as a webpage.

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Calculating K9 to Human Age (Dog <9.5Kg)

Enter Dog's Age Here
K9 Age (Input) Human Age (Output)

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Calculating K9 to Human Age (Dog 9.5 to 22.7Kg)

Enter Dog's Age Here
K9 Age (Input) Human Age (Output)

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Calculating K9 to Human Age (Dog 22.8 to 40.8Kg)

Enter Dog's Age Here
K9 Age (Input) Human Age (Output)

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Calculating K9 to Human Age (Dog >40.8Kg)

Enter Dog's Age Here
K9 Age (Input) Human Age (Output)

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Calculating K9 to Human Age (Average)

Enter Dog's Age Here
K9 Age (Input) Human Age (Output)

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Calculating Human to K9 Age (Dog <9.5Kg)

Enter Dog's Age Here
Human Age (Input) K9 Age (Output)

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Calculating Human to K9 Age (Dog 9.5 to 22.7Kg)

Enter Dog's Age Here
Human Age (Input) K9 Age (Output)

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Calculating Human to K9 Age (Dog 22.8 to 40.8Kg)

Enter Dog's Age Here
Human Age (Input) K9 Age (Output)

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Calculating Human to K9 Age (Dog >40.8Kg)

Enter Dog's Age Here
Human Age (Input) K9 Age (Output)

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Calculating Human to K9 Age (Average)

Enter Dog's Age Here
Human Age (Input) K9 Age (Output)

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URL for this homepage: http://pmyers.pcug.org.au/K9Pets/CalcK9toHumanAges.html

This page 2007, Paul Myers, Paul Myers