Leopard Gecko Lifespan & Age Calculator

Estimates only. There is no veterinary standard for leopard gecko years to human years, and every gecko ages differently. See a reptile vet for health concerns.

How long do leopard geckos live?

Leopard geckos are one of the longest-lived small lizards kept as pets. The vet-reviewed answer from PetMD is that leopard geckos live 10–20 years in captivity with good healthcare, a proper environment and a healthy diet. VCA Animal Hospitals gives a slightly shorter leopard gecko life expectancy of 10–15 years, and ReptiFiles, a widely used husbandry reference, says 15–20 years on average. So a realistic leopard gecko average lifespan for a well-kept pet is about 15 years, the middle of PetMD's range. That's the figure the calculator uses for "% of lifespan" and "years remaining".

Not every gecko gets there. Arbor View Animal Hospital's vet-written care guide is blunt: reports of geckos living over 20 years "are not unheard of, but most leos live 6-10 years". The gap between what a leopard gecko can live and what many actually live is mostly about care, which is why the factors further down this page matter so much. If you have seen people search for "gecko leopard lifespan" or "gecko life span" and get answers anywhere from 5 to 30 years, this is why: some sources describe the average outcome, others the potential.

Leopard gecko lifespan at a glance

• Typical pet lifespan: 10–20 years (PetMD); 10–15 years (VCA); 15–20 years (ReptiFiles).
• Wild lifespan: about 6–8 years (PetMD).
• Leopard gecko max age: 32 years, the oldest recorded leopard gecko according to Arbor View Animal Hospital. The AnAge longevity database lists 28.5 years.
• Senior from: about 10 years on this calculator (about 52.7 in human years).

Put another way, a leopard gecko bought as a hatchling by a ten-year-old child could still be alive when that child finishes university. Plan for a commitment closer to a cat's than a hamster's.

Leopard gecko lifespan in captivity (as a pet)

The leopard gecko lifespan in captivity is far longer than in the wild because a pet gecko is protected from the things that kill wild ones. So how long do leopard geckos live as pets? With a correct heat gradient, a varied insect diet, calcium supplements and a vet who sees reptiles, 10–20 years is a fair expectation. The Animal Diversity Web puts the captive lifespan at about 22 years, and LafeberVet's veterinary information sheet says leopard geckos can live 25–30 years.

Most pet leopard geckos today are captive-bred, and Arbor View recommends them over wild-caught animals. The species itself is not endangered: the IUCN Red List assesses Eublepharis macularius as Least Concern.

Why many pet geckos die young

Arbor View's list of problems that leopard geckos are prone to reads like a list of avoidable mistakes. It includes impaction from swallowed substrate, metabolic bone disease (weak, soft bones from too little calcium or vitamin D3), shedding problems, obesity, parasites and reproductive disorders. PetMD adds respiratory disease and vitamin A deficiency. Most of these come down to husbandry: the wrong temperatures, a monotonous or unsupplemented diet, or loose bedding for a young gecko. That's why the leopard gecko lifespan as a pet varies so much from home to home.

How long do leopard geckos live in the wild?

PetMD says leopard geckos in the wild typically live only 6–8 years. Wild leopard geckos come from the arid grasslands and desert regions of Afghanistan, Pakistan, Iran, Nepal and India (Arbor View). They are ground-dwelling and nocturnal, spending the day in burrows, under stones or under loose bark.

The reasons how long leopard geckos live in the wild is so much shorter are the same pressures every small wild lizard faces. PetMD lists parasites, harsh weather changes such as droughts, disease and predators. A wild gecko that can't find enough insects during a drought has no keeper to feed it, and an injured one has no vet. In a home, food arrives on schedule, the temperature is controlled and nothing is hunting it. That roughly doubles life expectancy.

One survival trick wild geckos rely on can work against pets: like many lizards, leopard geckos can drop their tail when grabbed (Arbor View). The tail is their fat store and takes weeks to regrow, so it should never be pulled.

Male vs female leopard gecko lifespan

None of the vet or reference sources we checked gives a different lifespan for males and females. PetMD, VCA, Arbor View and the Animal Diversity Web all give a single range for the species. So the calculator uses the same lifespan for both sexes, and choosing "male" or "female" changes only the care notes, not the numbers.

That said, the female leopard gecko lifespan carries a risk that males don't face: egg-laying. Females reach sexual maturity at about 9–18 months (PetMD, Arbor View), and the Animal Diversity Web notes that clutches are almost always two eggs, with a healthy female producing as many as six clutches a year. Females can produce eggs even without a male. VCA Animal Hospitals notes that most reptiles brought to vets for dystocia (egg binding) are single females that have never been with a male. Dystocia can be life-threatening. VCA links it to poor husbandry, including wrong temperatures, too little UV light, a poor diet low in calcium and no suitable place to lay. Watch for a female that stops eating, looks swollen and becomes weak. That needs a reptile vet promptly, not a wait-and-see approach.

Males have their own risk: they fight. Arbor View advises housing leopard geckos alone because they can seriously injure each other, and two males together are the classic example.

How to tell males from females

Arbor View notes that males have more prominent femoral pores (a V-shaped row of pores in front of the vent) and a hemipenal bulge behind the vent. Sex in leopard geckos is set by the temperature at which the egg is incubated, so breeders can produce mostly males or mostly females (Wikipedia, citing incubation studies).

Leopard gecko age chart (leopard gecko years to human years)

This leopard gecko age chart converts leopard gecko years to human years from 3 months to 25 years, with the life stage and how far the gecko is through an average 15-year pet lifespan. The numbers are the same ones the calculator gives. So how old is a leopard gecko in human years? About 15 at 1 year, 32.3 at 5, 52.7 at 10 and 73.1 at 15.

Human years: about 15 at 1 year and 18 at full size (18 months), then about 4.1 human years per gecko year, so that 15 years, the middle of the 10–20 year pet range, equals 73.1 human years (WHO global life expectancy). Ages past 20 are rare, so the numbers there are only a playful comparison.

Leopard gecko life stages

PetMD's vet-reviewed article divides a leopard gecko's early life into four stages by age and size. We added a senior stage for older adults. These leopard gecko life stages drive the calculator's stage label and care tips:

Signs at each stage

• Hatchling (0–2 months): about 3–4 in long and only 2–5 g. Hatchlings need small insects every day (Arbor View suggests 2–3 items daily for geckos under 6 months), and Arbor View advises keeping juveniles off loose substrate.
• Juvenile (2–7 months): eating well and growing fast. VCA advises feeding juveniles every 1–2 days. PetMD's juvenile is about 5 in long and 15–25 g.
• Sub-adult (7–12 months): nearly adult length but still filling out. The first signs of sex (pores and bulges) become clear, and some females start producing eggs.
• Adult (1–10 years): PetMD says leopard geckos stop growing at around 1.5 years. Adults eat less often: VCA says 2–3 times a week, and Arbor View says every 2–3 days.
• Senior (10+ years): no veterinary source sets a senior age for leopard geckos. We use 10 years, two-thirds of the way to the 15-year average, which is also where Arbor View's "most live 6-10 years" ends and PetMD's 10–20 year range begins.

Signs of an old leopard gecko

Because no vet source publishes a checklist for a senior leopard gecko, it helps to separate normal aging from illness. Keepers commonly report that older geckos become less active, spend more time in their hides, eat a little less and gain or lose weight more slowly. Those changes are expected in a gecko in its teens.

The trouble is that the same changes are also how illness shows. PetMD lists weight loss, lethargy and decreased appetite as warning signs of disease at any age. So treat any of these old leopard gecko signs as a reason to book a check-up rather than as "just old age":

• A tail that is getting thinner, since the tail is the fat reserve (Arbor View), or steady weight loss over several weeks.
• Refusing food for more than a short spell, especially with lethargy.
• Stuck shed on the toes or tail tip. Arbor View warns it can constrict and lead to the loss of toes.
• Weakness, trembling or a soft or crooked jaw or limbs, which can point to metabolic bone disease (PetMD, Arbor View).
• Thin body with diarrhea, which Arbor View links to parasites.

Senior leopard gecko care

• Regular vet checks: Arbor View recommends an exam every 6–12 months for leopard geckos, and PetMD says at least once a year. For a senior, ask your vet whether twice a year makes sense.
• Weigh monthly: a kitchen scale in grams is the simplest early warning system you have.
• Make the warm hide easy to reach: keep basking spots low and flat, and keep water and the calcium dish within easy reach.
• Keep shedding easy: Arbor View recommends 30–40% humidity plus a humid hide.

What affects a leopard gecko's life expectancy?

The life expectancy of a leopard gecko depends mostly on things a keeper controls. This is general information drawn from vet and care sources, not medical advice. Ask a reptile vet about any treatment or supplement plan.

• Heat gradient: reptiles rely on their surroundings for body heat. Arbor View recommends a basking spot of 95–100 °F, a warm side of 85–90 °F and a cool side of 70–80 °F, with nights dropping to the low to mid 60s. VCA gives a cage temperature in the mid-80s °F (about 30 °C) and nights as low as 70 °F (21 °C). Arbor View also notes that leopard geckos need daytime basking temperatures for optimal growth, even though they are active at night.
• UVB lighting, a real debate: VCA says UVB "is not required, but is recommended" for leopard geckos. Arbor View disagrees, calling UVB "NOT optional" for lizards and citing research showing that leopard geckos exposed to UVB have higher vitamin D3 levels in their skin. Arbor View advises replacing UVB bulbs every 6 months, because they keep glowing after their UVB output fades. Both sources agree that UVB helps; if you use it, follow the maker's distance guidance.
• Diet and insects: leopard geckos eat only insects. VCA lists crickets, silkworms, dubia roaches and smaller numbers of mealworms, superworms and waxworms. Arbor View stresses variety to avoid nutrient deficiencies and says insects should be live and no larger than half the width of the gecko's head. Keep smaller insect-eaters too, such as dart frogs or hatchlings of tiny gecko species? Our flightless fruit fly culture calculator plans their feeder cultures.
• Gut-loading: insects are low in nutrients on their own. VCA advises feeding prey a high-quality diet for at least 24 hours before offering them, and Arbor View says 24–48 hours.
• Calcium and vitamin D3: VCA recommends lightly dusting insects with a phosphorus-free calcium powder and keeping a shallow dish of calcium in the enclosure. Arbor View notes that calcium powder doesn't need D3 if UVB is adequate, and that a multivitamin containing vitamin A is also used. Follow the product label and your vet's advice, because too much can be as harmful as too little.
• Metabolic bone disease (MBD): both PetMD and Arbor View list it among the most common problems. It is linked to low calcium, poor UVB and poor diet, and is far easier to prevent than to treat.
• Impaction and substrate: VCA warns never to use coarse sand, corncob bedding or crushed walnut shells, because swallowed bedding can block the intestines. Arbor View adds calcium sand and gravel to the avoid list, keeps juveniles off loose substrate, and suggests offering food in a dish if you use a packed natural substrate.
• Egg-binding in females: see the male vs female section above (VCA).
• Stress and housing: Arbor View says reptiles are stressed by too much exposure, not by too much space. It recommends a hide at both the warm and cool ends and housing geckos alone.
• Enclosure size: older guides allowed a 10-gallon tank for one gecko (VCA). Newer guidance asks for much more: Arbor View sets 30–40 gallons as the minimum, and ReptiFiles 36 × 18 × 18 in. ReptiFiles argues that bigger, enriched enclosures get geckos exercising more, which keeps them healthier and may help them live longer. See our leopard gecko tank size by age table.
• Genetics: PetMD names breeder genetics and morph selection as a lifespan factor, and Arbor View advises against buying the enigma morph because of its link to neurological problems.

How to help your leopard gecko live longer

If you are wondering how to make a leopard gecko live longer, the vet sources above boil down to a short checklist:

• Find a reptile vet before you need one, and book an exam every 6–12 months (Arbor View) or at least once a year (PetMD).
• Measure temperatures with digital thermometers at both ends, and a basking spot with an infrared thermometer (Arbor View).
• Offer UVB lighting and replace the bulb as directed (VCA recommends it; Arbor View considers it essential).
• Feed a variety of live, gut-loaded insects dusted with phosphorus-free calcium (VCA, Arbor View).
• Use tile, paper or a packed substrate, not loose sand, corncob or walnut shell, especially for juveniles (VCA, Arbor View).
• House one gecko per enclosure, with warm, cool and humid hides (Arbor View).
• Give it room: at least 30–40 gallons (Arbor View) or 36 × 18 × 18 in (ReptiFiles).
• Weigh monthly, check the tail and toes, and see a vet for weight loss, lethargy or stuck shed.
• For females, provide a suitable place to lay eggs and see a vet promptly if she seems egg-bound (VCA).

Pet gecko lifespan: how long do other geckos live?

"How long do geckos live?" has no single answer, because "gecko" covers many species of very different sizes. Among the geckos commonly kept as pets, though, most live a long time. The chart and table compare the typical pet gecko lifespan for the six species in the calculator's "Type of gecko" menu.

Crested gecko lifespan

PetMD's care sheet gives the crested gecko lifespan as 15–20 years with proper care, and ReptiFiles agrees. That's a little longer than the bottom of the leopard gecko's range, though the two overlap a lot. Crested geckos are tree-dwellers that eat a fruit-based diet, so their care is very different despite the similar lifespan.

African fat-tailed gecko lifespan

The leopard gecko's closest relative in the pet trade, the African fat-tailed gecko, lives about as long. Tree of Life Exotic Pet Medical Center, a vet practice, gives the African fat-tailed gecko lifespan as 10–20 years in captivity, and ReptiFiles says 15–20. Like leopard geckos, they are nocturnal and have a plump, fat-storing tail (ReptiFiles).

Gargoyle, tokay and house geckos

Gargoyle geckos typically live 15–20 years (ReptiFiles). PetMD says tokay geckos live 10+ years with proper care, and the Animal Diversity Web gives a captive average of about 10.5 years. The AnAge database records a tokay that reached 23.5 years. The calculator uses 10–20 years for tokays because PetMD gives only a minimum; that upper end comes from keeper guides. The small common house gecko is the short-lived exception: the Animal Diversity Web gives about 5 years in the wild and up to about 8 in captivity.

So how long do pet geckos live? For the popular pet species, usually 10–20 years. Leopard, crested, fat-tailed and gargoyle geckos all sit in roughly that band. That's several times the 1.5–3 years the Merck Veterinary Manual gives for hamsters, a pet of similar size.

The oldest leopard gecko on record

The oldest leopard gecko we could confirm from a veterinary source was 32 years old. Arbor View Animal Hospital's care guide (Catherine Love, DVM) states that "the oldest recorded leopard gecko was 32 years old". The AnAge database, which collects maximum lifespans for researchers, lists 28.5 years for a captive leopard gecko. PetMD adds that some geckos reach their late 20s or early 30s.

We found no Guinness World Records entry for the oldest leopard gecko. Ages of 40 or more circulate online, but we couldn't trace any to a documented animal, so we don't use them. The calculator accepts ages up to 32 years and asks you to double-check anything older.

Can a leopard gecko live 20 years?

Yes. Twenty years is the top of PetMD's 10–20 year range for pets, and Arbor View says geckos living over 20 years "are not unheard of". A 20-year-old leopard gecko is about 93.5 in human years on our chart. It is a fine old age that takes consistent care, but it is not a freak result.

How this leopard gecko age calculator works

There is no veterinary formula for converting leopard gecko years to human years, so every leopard gecko age calculator is an estimate. The methods online differ widely. Many simply multiply by about 5, which is 100 human years divided by a 20-year gecko lifespan. Others scale by the average lifespan, so 73 human years divided by 15 gecko years is about 4.9 per year. Both are easy, but both make a 1-year-old gecko a young child. That doesn't fit the biology: by 12 months PetMD treats a leopard gecko as an adult, sexual maturity arrives at 9–18 months, and growth stops at about 18 months.

So this calculator uses two parts. Up to 18 months it follows development. A 1-year-old, adult but still maturing, counts as about 15 human years, the same first-year figure used for cats and dogs. A fully grown 18-month-old counts as 18. After that it scales by lifespan, so that the middle of the species' typical range (15 years for a leopard gecko) equals 73.1 human years, the WHO global life expectancy. We use the same anchor on our tortoise age calculator. For other geckos only the lifespan changes. A 17.5-year crested gecko average gives about 3.4 human years per year, and the shorter-lived house gecko about 11.

The calculator also shows the life stage (PetMD's stages, plus senior from two-thirds of the average lifespan), the share of the average lifespan used, the average years remaining, a life-journey timeline and care tips for the stage. Its limits: the human-year number compares life stages and isn't a biological measurement. It can't judge your gecko's health, and it can't estimate the age of a gecko whose hatch date you don't know. For that, try our leopard gecko size by age calculator, which estimates age from length and weight while a gecko is still growing. Keep other reptiles too? Compare with the bearded dragon age calculator or the ball python size chart. Many gecko keepers also keep amphibians: our axolotl lifespan and age calculator works the same way, with the same 73.1-year human anchor.

Frequently asked questions

This calculator gives an estimate for education and fun. Every pet ages differently — for health decisions, talk to your veterinarian.