Crested Gecko Weight Chart by Age: Growth Milestones
Crested gecko weight chart from hatchling to adult. Track growth milestones month by month and learn when slow growth signals a problem.
Tracking your crested gecko's weight is the single most reliable way to monitor overall health. Unlike visible symptoms like lethargy or appetite changes, which can be subjective, weight is a number you can track over time. A gecko that gains steadily is thriving. A gecko that stalls or loses weight has a problem that needs investigation.
This chart shows the typical weight range for crested geckos at each age. Individual geckos vary based on genetics, sex, diet, and husbandry, but this range represents what a healthy, well-fed gecko should weigh. If your gecko falls below the low end of the range consistently, check temperature, diet, and stress factors.
The most common cause of slow growth in crested geckos is temperature. A gecko kept at 68F will grow significantly slower than one at 75F because metabolic rate is directly tied to temperature in ectotherms. If your gecko is underweight, check your thermometer before changing the diet. The second most common cause is diet quality. Cheap, off-brand CGDs or diets that rely too heavily on fruit and not enough on CGD will result in slower growth. Pangea and Repashy are the standard for a reason.
Published 2026-05-05. Updated 2026-10-16.
TL;DR
- A healthy crested gecko hatchling weighs 1.5-3 grams. Adults reach 35-60 grams from about 18-24 months.
- Juveniles (3-12 months) grow fastest, gaining about 1-4 grams per month with proper diet and husbandry.
- Males tend to max out around 35-45 grams. Females, especially breeding females, often reach 45-55 grams.
- Weigh every 1-2 weeks while growing and monthly as an adult, on a digital kitchen scale (0.1g precision). Consistent weight loss over 2+ weigh-ins is a red flag.
- Slow growth usually comes from low temperatures, inadequate diet, or stress, not genetics. Fix husbandry before assuming a gecko is "just small."
Frequently asked questions
How much should my crested gecko weigh?
A healthy adult crested gecko weighs 35-60 grams from about 18-24 months old. Males typically max out at 35-45 grams, while females often reach 45-55 grams. Hatchlings start at 1.5-3 grams.
How fast do crested geckos grow?
Crested geckos grow fastest as juveniles (3-12 months), gaining about 1-4 grams per month with proper husbandry. Growth slows after 12 months and most geckos reach full adult size by 18-24 months.
Why is my crested gecko not growing?
The three most common causes of slow growth are: low enclosure temperature (below 72F), inadequate diet (not enough CGD or low-quality food), and stress (enclosure too sparse, too much handling, or high-traffic location). Check all three before assuming genetics.
How often should I weigh my crested gecko?
Weigh every 1-2 weeks while your gecko is growing, every 3 weeks as a sub-adult and monthly as an adult. Use a digital scale with 0.1g precision. Weigh weekly if you suspect a health problem or during breeding season for females.
When can I breed my crested gecko?
Males are physically capable of breeding around 9-12 months but should wait until they are at least 25-30 grams and 12 months old, and many breeders wait for 35 grams. Females should not be bred until they weigh at least 40 grams and are 18+ months old to avoid egg-binding and calcium depletion.
Do crested geckos lose weight in winter?
Some adult crested geckos experience a mild seasonal appetite decrease in winter, especially if room temperatures drop. A 1-2 gram fluctuation is normal. Significant weight loss (3+ grams) in winter should prompt a husbandry check.
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