Cat · Medium Breed
Devon Rex Age Calculator
Use this Devon Rex age calculator to convert cat years to human years. You can also check the average Devon Rex lifespan, adult weight range, growth chart, feeding guide, and breed facts in one place.
Quick Answer
Devon Rex facts at a glance
Average lifespan
10-15 years
Adult weight
2-5 kg
Fully grown
12-18 months
The Calculator
How old is your Devon Rex in human years?
At 1 year old
Your Devon Rex is approximately 15 in human years.
Field Notes
Devon Rex Lifespan, Size, and Care
The Devon Rex originated in Devon, England, in the late 1950s when a curly-coated kitten was discovered and became the foundation of the breed. Although it is sometimes confused with the Cornish Rex, the Devon Rex has a different genetic mutation and a distinct coat texture and body type.
Devon Rex cats are affectionate, mischievous, and often described as clownish because of their playful behavior. They usually bond closely with their people, enjoy being involved in daily activities, and tend to do well in homes where they receive plenty of attention and companionship.
Their coat is low-shedding but delicate, so grooming should be gentle to avoid damaging the fragile hairs. Owners should also pay attention to skin oil buildup, ear cleanliness, dental care, and a balanced diet to help maintain healthy body condition and overall wellness.
Despite their slender appearance, Devon Rex cats are active and athletic and benefit from daily play and environmental enrichment. Interactive toys, climbing spaces, puzzle feeders, and regular human engagement help meet their exercise needs and prevent boredom.
Temperament
Exercise Needs
moderate
Health Watch
- Hypertrophic cardiomyopathy (HCM)
- Patellar luxation
- Hereditary myopathy
- Dental disease
- Skin and ear oil buildup or dermatitis
Grooming
The Devon Rex needs gentle, minimal grooming, with regular ear cleaning and occasional skin care because its fine coat and oily skin can make it prone to buildup.
Growth Curve
Devon Rex weight chart
Typical weight progression from young to adult. The tinted band marks the healthy adult range. 2-5 kg.
Nutrition, Staged
Devon Rex Feeding Guide
Use this Devon Rex feeding guide as a starting point for common life stages, then adjust for body condition, activity, and veterinary advice.
Formative years
Young
Feed a complete kitten formula in several small measured meals each day, with the exact amount adjusted to growth rate and body condition. Kittens should stay on a growth diet until your veterinarian confirms they are ready for adult food.
Peak years
Adult
Feed a complete adult cat food in measured portions and monitor body condition closely, because indoor cats often need fewer calories than owners expect. Wet food, fresh water, and routine portion checks help reduce weight gain and support urinary health.
Mature years
Senior
Older cats often need closer monitoring of weight, appetite, hydration, and dental comfort even before a full diet change is needed. Ask your veterinarian about senior diets if kidney disease, thyroid disease, muscle loss, or digestive changes start to affect intake.
Questions, Answered
On the Devon Rex
That depends on the pet's actual age. Use the calculator above to estimate a Devon Rex's age in human years using the method shown on this page.
Most Devon Rexs live 10-15 years, although genetics, diet, body condition, husbandry, and preventive care all influence the real outcome.
A full grown Devon Rex usually weighs 2-5 kg, though sex, lineage, and body condition can move an individual above or below the average range.
Most Devon Rexs are close to full size around 12-18 months, although growth rate and final build vary from one pet to another.
Use the feeding guide above as a starting point, then adjust for age, body condition, activity, and your veterinarian's recommendations.
Yes, Devon Rex cats are often excellent family pets because they are affectionate, playful, and very people-focused. They usually enjoy attention from adults and children alike, as long as handling is gentle and respectful.
Devon Rex cats usually shed less than many other breeds, but they are not completely non-shedding. Their coat is fine and sparse, so loose hair may be less noticeable, though skin oils and dander can still be present.
Yes, this breed generally thrives on companionship and can become lonely if left alone for long periods. They tend to follow their owners around, seek lap time, and do best in homes where they get frequent interaction and play.
They are not high maintenance in terms of heavy brushing, but they do need consistent care in other ways. Regular ear cleaning, dental care, skin monitoring, and mental stimulation are important parts of keeping them healthy and comfortable.
A warm, interactive indoor home is usually ideal for a Devon Rex because their light coat offers less insulation than that of many other cats. They do best with owners who can provide affection, climbing opportunities, toys, and daily engagement.
Adjacent Breeds
Breeds often compared with Devon Rex
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