# Pet Age Converter Convert a dog or cat's age into human-equivalent years using the modern AVMA method (with breed-size grouping for dogs) or the UCSD epigenetic formula, and see the pet's life-stage milestone plus a printable vet-visit summary card. > Canonical page: https://elysiatools.com/en/tools/human-age-to-dog-cat-years - **Category:** Education - **Keywords:** pet age, dog years, cat years, animal age, life stage, veterinary, avma, epigenetic, human equivalent ## Overview A pet age converter that replaces the outdated "multiply by 7" myth with the modern veterinary method. For dogs it uses the AVMA-endorsed Chewy vet-reviewed table: year 1 = 15 human years, year 2 = 24, then size-dependent increments (small dogs age slowest, giant dogs fastest), with four size bands. For cats it uses the standard 15-9-4 rule. An optional UCSD 2020 epigenetic mode applies human_age = 16·ln(dog_age) + 31 (calibrated only on Labradors). The tool also classifies the pet into its AAHA/AAFP life stage and emits a printable vet-visit summary card. Age-equivalents are approximate veterinary guidance, not medical advice. ## Inputs - **Pet age (years)** (number): e.g. 5 - **Pet type** (select) - **Dog size (for dogs only)** (select) - **Conversion method** (select) - **Decimal places** (number) ## When to use - Estimate the human-equivalent age of a dog or cat. - Compare how dog size affects age conversion under the AVMA method. - Prepare a simple age and life-stage summary for a veterinary visit. ## How it works - Enter the pet’s age from 0 to 30 years and choose Dog or Cat. - For dogs, select a size band: small, medium, large, or giant. - Choose the AVMA standard or the UCSD epigenetic method, then set the preferred decimal places. - The tool calculates an approximate human-equivalent age, assigns a life stage, and provides a printable vet-visit summary card. ## Use cases - Pet owners can translate a dog’s or cat’s age into a familiar human-equivalent estimate. - Dog owners can compare age estimates across small, medium, large, and giant size bands. - Pet owners can bring the life-stage result and printable summary card to a veterinary appointment. ## Frequently asked questions ### Does this converter use the multiply-by-seven rule? No. It uses modern veterinary methods instead of the outdated multiply-by-seven rule. ### How are dog sizes used in the AVMA method? Dogs are grouped as small, medium, large, or giant because size affects the age increments after the first two years. ### How is a cat’s age converted? The AVMA option uses the standard 15-9-4 rule: 15 human years for year one, 24 for year two, and four additional years per year afterward. ### What is the UCSD epigenetic method? It applies human_age = 16·ln(dog_age) + 31 and is calibrated only on Labradors. ### Are the results medical advice? 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