Cat Age FAQs: Senior Care, Longevity & Life Stages
Expert answers to cat aging questions — life stage transitions, senior care needs, longevity factors, and when to start geriatric screenings. Based on AAFP and ISFM guidelines.
最終更新日：July 2026。ソース：AAFCO, AAHA, WSAVA, AAFP, ASPCA
このページは 7 のよくある質問を集約しています ガイドと計算機からのものです。
Cat Age Calculator
Cat Age Calculatorに移動 →How old is my cat in human years?
A 1-year-old cat is roughly 15 human years. A 5-year-old is about 36. Our calculator uses the AAHA/AAFP feline life stage guidelines. After age 3, each cat year adds approximately 4 human years — a 10-year-old cat is about 56 human years, and a 15-year-old is about 76.
ソース: Cat Age Calculator
What are the feline life stages?
AAHA/AAFP 2021 guidelines: Kitten (0-6 months), Junior (7 months-2 years), Prime (3-6 years), Mature (7-10 years), Senior (11-14 years), Geriatric (15+ years). Each stage has different health and checkup needs.
ソース: Cat Age Calculator
How long do cats live?
Indoor cats live 12-18 years on average, with many reaching 20+. Outdoor cats average only 2-5 years due to traffic, predators, disease, and environmental hazards. Key longevity factors include indoor lifestyle, regular veterinary checkups, species-appropriate nutrition, dental care, and maintaining a healthy weight.
ソース: Cat Age Calculator
What is the oldest cat ever recorded?
The oldest cat ever recorded was Creme Puff, a domestic shorthair from Austin, Texas, who lived to 38 years and 3 days (1967-2005). The oldest living cat on record (as of 2024) is Flossie, a 28-year-old British tortoiseshell. Indoor cats routinely live 18-25 years with excellent care.
ソース: Cat Age Calculator
Senior Cat Care Guide
Senior Cat Care Guideに移動 →When is a cat considered a senior?
Cats are considered "Senior" at 11-14 years (roughly 56-76 human years) and "Geriatric" at 15+ years. However, age-related changes begin earlier: kidney function decline can start at 7-8 years, and dental disease is prevalent by age 3. AAFP recommends biannual exams starting at age 7-8.
What health screenings do senior cats need?
AAFP recommendations for senior cats (11+ years): biannual exams with blood work (CBC, chemistry, thyroid T4), urinalysis (checking for protein loss and concentration), blood pressure screening (hypertension often accompanies kidney disease and hyperthyroidism), and dental assessment. Early detection of chronic kidney disease is critical — it affects 30-40% of cats over 10.
Dog Years vs Cat Years
Dog Years vs Cat Yearsに移動 →How does cat aging compare to dog aging?
Cats age similarly to dogs in early years but maintain a more consistent aging rate throughout life. A 10-year-old cat (~56 human years) has aged more slowly than a large-breed dog of the same age (~66-70 human years). Cats' consistent aging rate contributes to their longer average lifespan.
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