Crested Gecko Size & Weight Chart by Age

Last updated: · Reviewed against sources listed below

This crested gecko growth chart shows typical weight and length by age. Hatchlings weigh about 1.5–3 grams, and most crested geckos reach 35–55 grams and about 7–9 inches by 18–24 months. Females are often heavier than males.

Measure by

Weigh on a kitchen scale before feeding.

This is our reptile age and growth estimator, preset for crested geckos.

Crested Gecko growth chart by age

Weight is the most useful measure. Growth varies a lot with feeding and temperature, so treat these as broad ranges. Use the °F / in button at the top of the page to switch to centimeters.

AgeTotal lengthWeight
Hatchling3–4 in8–10 cm2–3 g (0.05–0.11 oz)2–3 g
3 months3.5–5 in9–13 cm4–10 g (0.14–0.35 oz)4–10 g
6 months4.5–6 in11–15 cm8–20 g (0.28–0.71 oz)8–20 g
9 months5.5–7 in14–18 cm15–28 g (0.53–0.99 oz)15–28 g
12 months6–8 in15–20 cm20–38 g (0.7–1.3 oz)20–38 g
18 months7–9 in18–23 cm30–50 g (1.1–1.8 oz)30–50 g
2 years7–9 in18–23 cm35–55 g (1.2–1.9 oz)35–55 g

How big do crested geckos get?

Adult crested geckos measure about 7–9 in18–23 cm including the tail and usually weigh 35–55 g (1.2–1.9 oz)35–55 g. Males are often a little lighter, while females are frequently heavier, especially when producing eggs. A gecko that has dropped its tail is shorter but otherwise normal.

Crested geckos grow steadily for their first year and reach adult size at about 18–24 months. They are usually sexually mature at about 15–18 months. Females should weigh at least 35–40 grams before they are ever bred.

Weighing your crested gecko

Crested geckos are light, so use a digital scale that reads to 0.1 gram. Put your gecko in a small lidded container, weigh it, and subtract the container. Weigh every two to four weeks, at the same time of day, and keep a log.

Body shape helps too. A healthy crested gecko has a gently rounded belly and firm, straight limbs. Visible hip bones or a thin tail base suggest it is underweight; fat pads in the armpits or a very round belly suggest too much food.

Why is my crested gecko growing slowly?

  • Not enough food: juveniles need fresh diet every day.
  • A diet mixed too thin, or fruit and baby food replacing the complete diet.
  • Temperatures that are too cool for long periods, which slow digestion.
  • Stress from a new home, frequent handling or a cage mate.
  • Metabolic bone disease or parasites. A vet check can rule these out.

See a reptile vet if your gecko is losing weight, has a bendy or swollen jaw or limbs, shakes, or cannot climb glass. These can be signs of metabolic bone disease, a calcium problem that needs treatment.

Frequently asked questions

How fast do crested geckos grow?

Most crested geckos grow from about 1.5–3 g at hatching to around 8–20 g at 6 months and 20–38 g at a year. They reach adult size, usually 35–55 g, at about 18–24 months. Daily feeding of a complete diet is the biggest factor in steady growth.

How can I tell if my crested gecko is male or female?

Adult males have a visible bulge at the base of the tail and a row of enlarged scales, called pores, just in front of the vent. Females lack the bulge and have smaller or no pores. These features become clearer as the gecko matures, and a magnifying glass or a close-up photo helps.

At what age is a crested gecko fully grown?

Most crested geckos reach adult size at about 18–24 months and are sexually mature at 15–18 months. After that, weight changes mostly reflect feeding, egg production in females and body condition, so keep weighing your gecko every few weeks.

Sources

Where sources disagree we show the range they share. See our sources and methodology for how every number is checked.

Results are estimates for healthy animals. Always consult a reptile veterinarian for individual advice. Read our disclaimer.

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