Selkirk Rex Age Calculator
Selkirk Rexs are a longhaired cat breed typically weighing 10–16 lb (4.5–7.3 kg) at adulthood. Typical indoor lifespan is 10–15 years. Naturally curly coat from a spontaneous mutation. Sweet, patient temperament.
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Personalised, breed-aware, and lifestyle-adjusted. Indoor-only cats live more than twice as long as outdoor cats — we factor that in.
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Start typing to filter. Most household cats are best estimated with the "Mixed / unknown" tab.
Using the standard AAFP/AAHA formula for a typical domestic cat. No breed required.
That's about the same as a human young adult.
Adult — Prime years; maintain weight and dental care.
Indoor cats live nearly 3× as long as outdoor cats on average.
How a Selkirk Rex ages
Like all cats, a Selkirk Rex ages quickly in the first two years (~15 human-equivalent years in year one, then another ~9 in year two), then settles into a steady ~4 human years per cat year. That means a 7-year-old Selkirk Rex is approximately 44 years old in human terms — a mature adult.
Lifespan varies widely with lifestyle. Selkirk Rexs kept indoors with consistent veterinary care commonly reach the upper end of the 10–15 year range, sometimes well beyond. Outdoor-only Selkirk Rexs typically live less than half as long.
Selkirk Rex age conversion at a glance
| Selkirk Rex age | Human-equivalent |
|---|---|
| 1 year | 15 human years |
| 2 years | 24 human years |
| 5 years | 36 human years |
| 8 years | 48 human years |
| 12 years | 64 human years |
| 16 years | 80 human years |
Care notes for Selkirk Rexs
- Brushing 2–3 times per week minimum to prevent mats.
- Dental health is the most under-diagnosed cat issue — annual cleanings from year 5 onward.
- Bloodwork baseline at the start of "mature" stage (around age 7); kidney function is the key marker.
This is general breed-aware guidance. Always discuss specific concerns with your veterinarian.
Similar breeds you might be comparing
- Domestic Longhair — long-haired, 12–18 year lifespan
- Maine Coon — long-haired, 12–15 year lifespan
- Persian — long-haired, 12–17 year lifespan
Methodology: AAFP/AAHA Feline Life Stage formula. See the main cat age calculator for full methodology, indoor/outdoor lifespan model, and citations.
Selkirk Rex age FAQ
How old is a 7-year-old Selkirk Rex in human years?
Using the AAFP/AAHA formula, a 7-year-old Selkirk Rex is approximately 44 human years old. Try the calculator above with your cat's actual age, months, and lifestyle for a precise answer.
What is the typical lifespan of a Selkirk Rex?
Indoor Selkirk Rexs typically live 10–15 years. Lifespan varies widely with lifestyle. Selkirk Rexs kept indoors with consistent veterinary care commonly reach the upper end of the 10–15 year range, sometimes well beyond. Outdoor-only Selkirk Rexs typically live less than half as long.
When does a Selkirk Rex become a senior cat?
Most cats — including Selkirk Rexs — are considered senior starting at 11 years per AAFP guidelines. Mature stage (subtle age-related changes) begins around 7 years. Super-senior (geriatric) is 15+ years.
Are Selkirk Rexs good indoor-only cats?
Yes — almost all domestic cats, including Selkirk Rexs, do best as indoor-only cats. Indoor lifespan averages ~15 years versus ~6 for outdoor-only cats, and the breed's quality of life isn't significantly different indoors with appropriate enrichment (vertical space, play, window perches).