Rex rabbits typically live 6–8 years, which is about 50–62 in human years. A 1-year-old Rex rabbit is about 20 in human years, a 3-year-old about 32 and a 5-year-old about 44. Rex rabbits are considered seniors from about 4.
How old is my Rex rabbit in human years?
Rex rabbits are famous for their plush, velvety fur. PetMD traces the breed to France in the early 1900s; it was first shown at the 1924 Paris International Rabbit Show. The standard Rex is a medium-to-large rabbit of about 7.5–10.5 pounds, while the Mini Rex — developed in Texas in 1984 by Monna Berryhill and recognized by the ARBA in 1988 — has a maximum weight of 4.5 pounds.
Like all rabbits, Rex rabbits grow up fast. On our rabbit age chart a Rex rabbit is about 14 in human years at 6 months and 20 at its first birthday, then adds about 6 human years per year. That makes a 3-year-old about 32, a 5-year-old about 44 and a 8-year-old about 62 in human years. The calculator above does the conversion for any age in years and months.
Comparing types
| Type | Size | Adult weight | Lifespan | Human age at max lifespan | Senior from |
|---|---|---|---|---|---|
| Rex | Medium–large | 7.5–10.5 lb | 6–8 yrs | 62 | 4 yrs |
| Mini Rex * | Small | up to 4.5 lb | 9–10 yrs | 74 | 6 yrs |
* No breed-specific figure from a vet-reviewed source; range is the RWAF estimate for that size group.
Rex age chart: Rex age in human years
| Rex age | Human years | Life stage |
|---|---|---|
| 1 month | 3 | Baby (kit) |
| 2 months | 6 | Baby (kit) |
| 3 months | 9 | Adolescent |
| 4 months | 12 | Adolescent |
| 6 months | 14 | Teenager |
| 9 months | 17 | Adult |
| 1 year | 20 | Adult |
| 2 years | 26 | Adult |
| 3 years | 32 | Adult |
| 4 years | 38 | Senior |
| 5 years | 44 | Senior |
| 6 years | 50 | Senior |
| 7 years | 56 | Senior |
| 8 years | 62 | Senior |
| 9 years | 68 | Senior (beyond typical) |
| 10 years | 74 | Senior (beyond typical) |
Rex Rabbit Lifespan
PetMD says Rex rabbits typically live 6–8 years. For the Mini Rex rabbit lifespan we found no breed-specific figure from a vet-reviewed source. Weighing no more than 4.5 lb, the Mini Rex falls in the RWAF's medium-breed group, which has an approximate lifespan of 9–10 years, so the calculator uses that range. That fits the general pattern Oxbow and the RWAF describe: smaller rabbits usually live longer than larger ones.
Rex lifespan in human years
A typical 6–8 year life equals about 50–62 human years. The midpoint, 7 years, is about 56 in human years — so a Rex rabbit that reaches 8 has lived the equivalent of a human life. Remember that the human-year figure comes from a rabbit educator's chart, not a veterinary formula.
Rex health concerns
Health concerns commonly discussed for Rex rabbits include sore hocks on the large back feet, GI stasis, hairballs, parasites (ear mites, Cheyletiella mites, E. cuniculi) and dental problems.
PetMD notes that Rex rabbits may be at higher risk of sore hocks (sores on the underside of their large back feet) than smaller rabbits, because the short Rex coat gives less padding under the weight. It also lists GI stasis, hairballs, parasites (ear mites, Cheyletiella mites and E. cuniculi) and dental problems — rabbit teeth grow about 3 inches a year. The Mini Rex shares the Rex coat, so soft flooring is a good idea for both.
When is a Rex rabbit a senior?
The Rabbit Welfare Association & Fund (RWAF) sets senior age by size. Rex rabbits fall in its large and giant group, considered senior from about 4 years (roughly 38 in human years). Adulthood starts at 9 months (Oxbow notes some large breeds are adults this early). The RWAF stresses that these are guidelines and each rabbit should be assessed as an individual. Signs to watch for include:
- Weight loss or weight gain, or loss of muscle along the back
- Stiffness or reluctance to jump (the RWAF says arthritis and spondylosis are common and under-diagnosed)
- Eating less, favoring softer foods or drooling — possible dental disease
- Changes in droppings or appetite, which always deserve a prompt vet visit
Caring for a Rex
Provide soft, non-wire flooring and clean, dry bedding to protect the feet, unlimited grass hay for teeth and gut, and a vet check every 6–12 months that includes the hocks.
The basics that help every rabbit live longer apply here too: PetMD recommends unlimited hay, fresh greens and a small amount of pellets; living indoors protects rabbits from predators, extreme weather and contagious diseases; and spaying or neutering removes the high uterine cancer risk in females. rabbit.org reports that indoor house rabbits typically live 8–12 years, versus about 3–5 years for outdoor domestic rabbits.
How this Rex age calculator works
The calculator converts age with The Bunny Lady's rabbit chart — about 3 human years per month to 4 months, 20 at age 1, then +6 per year — and applies the Rex lifespan and RWAF senior age to show the life stage and how much of a typical lifespan has passed. Compare other breeds in our rabbit lifespan by breed guide, or use the general rabbit age calculator for a mixed-breed bunny.
Frequently asked questions
What is the Rex rabbit lifespan?
Rex rabbits typically live 6–8 years. That's about 50–62 in human years.
How long do Rex rabbits live?
Most Rex rabbits live 6–8 years. Indoor living, spay/neuter, a hay-based diet and regular vet checks give the best chance of reaching the top of the range.
How old is a 1 year old Rex rabbit in human years?
A 1-year-old Rex rabbit is about 20 human years old.
How old is a 5 year old Rex rabbit in human years?
A 5-year-old Rex rabbit is about 44 human years old.
When is a Rex rabbit considered a senior?
From about 4 years, following the RWAF's guide for large and giant rabbit breeds.
What is the Mini Rex rabbit lifespan?
No vet-reviewed source gives a breed-specific number. The Mini Rex (ARBA max 4.5 lb) falls in the RWAF's medium-breed group, with an approximate lifespan of 9–10 years.
Why do Rex rabbits get sore hocks?
PetMD says Rex rabbits may be at higher risk of sores on the underside of their large back feet than smaller rabbits. Soft, clean flooring helps.
Do Mini Rex rabbits live longer than standard Rex rabbits?
Probably, because smaller breeds usually live longer. Standard Rex rabbits live 6–8 years (PetMD); the RWAF's medium group, which includes Mini Rex-sized rabbits, is 9–10 years.
This calculator gives an estimate for education and fun. Every pet ages differently — for health decisions, talk to your veterinarian.