Rabbit · Medium Breed
Rex Age Calculator
Use this Rex age calculator to convert rabbit years to human years. You can also check the average Rex lifespan, adult weight range, growth chart, feeding guide, and breed facts in one place.
Quick Answer
Rex facts at a glance
Average lifespan
6-8 years
Adult weight
3-4.5 kg
Fully grown
18-24 months
The Calculator
How old is your Rex in human years?
At 1 year old
Your Rex is approximately 11 in human years.
Field Notes
Rex Lifespan, Size, and Care
The Rex rabbit was developed in France in the early 1900s after a naturally occurring genetic mutation produced its distinctive plush fur. The breed quickly gained attention for its unusual coat texture and was later refined into both Standard Rex and Mini Rex varieties, with the Standard Rex being the larger of the two.
Rex rabbits are generally known for their gentle, social temperament. Many are affectionate and enjoy human interaction, but they still need patient handling and time to build trust, especially when young. They often do well in calm households where they have predictable routines and regular enrichment.
Care for a Rex includes a spacious, clean enclosure, a diet based mostly on grass hay, measured pellets, fresh leafy greens, and constant access to clean water. Because their fur is fine and their feet may have less protective padding than some other breeds, soft, dry flooring is important to help prevent sore hocks. Regular observation of appetite, droppings, teeth, and behavior is essential, since rabbits often hide signs of illness.
Rex rabbits need daily exercise outside their enclosure in a safe, rabbit-proofed area. They benefit from room to hop, stretch, explore tunnels, and use chew toys that support both mental stimulation and dental health. Consistent activity helps maintain a healthy weight, supports digestion, and reduces boredom-related behavior problems.
Temperament
Exercise Needs
moderate
Health Watch
- Dental overgrowth and malocclusion
- Gastrointestinal stasis
- Sore hocks (ulcerative pododermatitis)
- Ear mites or other parasitic skin issues
- Obesity
Grooming
Rex rabbits need light regular grooming because their short plush coat mats less than long-haired breeds, but they should still be checked weekly and more often during shedding seasons.
Growth Curve
Rex weight chart
Typical weight progression from young to adult. The tinted band marks the healthy adult range. 3-4.5 kg.
Nutrition, Staged
Rex Feeding Guide
Use this Rex feeding guide as a starting point for common life stages, then adjust for body condition, activity, and veterinary advice.
Formative years
Young
Young rabbits should have unlimited hay, age-appropriate pellets, fresh water, and gradual introduction of leafy greens once digestion is stable. Alfalfa hay is often used for growing rabbits, but the exact transition to grass hay should be based on age, body condition, and veterinary guidance.
Peak years
Adult
Adult rabbits should eat mostly unlimited grass hay, plus daily leafy greens and a measured portion of high-fiber pellets. Sugary treats and large pellet portions should stay limited because obesity and digestive slowdown are common husbandry problems.
Mature years
Senior
Senior rabbits still need unlimited hay and fresh greens, but owners should watch weight, teeth, stool output, and appetite more closely as chewing efficiency changes with age. Ask a rabbit-savvy veterinarian to review the diet promptly if appetite dips, droppings shrink, or weight starts to fall.
Questions, Answered
On the Rex
That depends on the pet's actual age. Use the calculator above to estimate a Rex's age in human years using the method shown on this page.
Most Rexs live 6-8 years, although genetics, diet, body condition, husbandry, and preventive care all influence the real outcome.
A full grown Rex usually weighs 3-4.5 kg, though sex, lineage, and body condition can move an individual above or below the average range.
Most Rexs are close to full size around 18-24 months, although growth rate and final build vary from one pet to another.
Their diet should follow the same healthy rabbit standard: unlimited grass hay, fresh water, measured high-quality pellets, and daily leafy greens. Avoid sugary treats and sudden diet changes, because rabbits are prone to digestive upset and gastrointestinal stasis.
Rex rabbits can make excellent family pets when children are taught to handle them gently and respectfully. They are often calm and interactive, but like most rabbits they do not usually enjoy being picked up frequently, so supervised interaction is important.
The Rex has a genetic trait that makes the guard hairs the same length as the underfur, creating a dense, velvety texture. This unique coat is one of the breed's defining features, but it also means the fur can be more delicate and should not be over-groomed.
A Rex rabbit should have several hours of safe daily exercise outside its enclosure whenever possible. Space to run, jump, and explore helps support muscle tone, digestion, and emotional well-being, while also reducing boredom and excess weight gain.
Like many rabbits, Rex rabbits can develop dental disease and gastrointestinal stasis, but they are also known to be more vulnerable to sore hocks because of their fine fur and reduced foot cushioning. Keeping them on clean, dry, soft surfaces and maintaining proper weight can lower that risk.
Adjacent Breeds
Breeds often compared with Rex
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