How to Weigh a Crested Gecko and Track Healthy Growth Over Time

Use a digital scale that reads in grams. For hatchlings and small juveniles, a scale that measures to 0.1 gram is more useful than one that only rounds to whole grams. You will also need a lightweight container, such as a ventilated deli cup or small plastic tub, plus a notebook or phone app for logging results.

Set up the scale on a flat, stable surface away from fans, open windows, and other pets. If your gecko is active at night, many pet parents get the calmest readings in the evening when the gecko is naturally awake. Keep the session short and gentle.

Place the empty container on the scale and press tare so the display returns to zero. Then gently guide your crested gecko into the container. Avoid grabbing the tail, since crested geckos can drop their tails when stressed.

Wait for the number to stabilize, record the weight in grams, and return your gecko to the enclosure. If your gecko is especially jumpy, cover part of the container with your hand for a moment to reduce visual stimulation, but keep airflow open. Clean the container between pets if you have more than one reptile.

Hatchlings and small juveniles are usually easiest to track once weekly because they can change quickly as they grow. Older juveniles can often be weighed every 1 to 2 weeks. Healthy adults are commonly weighed every 2 to 4 weeks, and many stable adults do well with monthly checks.

Weigh at roughly the same time of day and under similar conditions each time. A gecko that has just eaten, passed stool, shed, or laid eggs may weigh differently that day. Consistency makes your log much more useful.

There is no single perfect number for every crested gecko. Age, sex, genetics, feeding pattern, and body frame all affect normal weight. PetMD notes that crested geckos typically reach adult size within about 6 to 12 months, but individuals mature at different rates. A steady upward trend in juveniles and a stable trend in adults are usually more helpful than comparing your gecko to someone else's pet.

Body condition matters as much as the scale. A gecko may be too thin if the hips, pelvis, spine, or skull look prominent, or if the tail base appears narrow and depleted. Reptile body condition guidance also warns that sunken eyes and visible bony landmarks can go along with unhealthy weight loss.

Record the date, weight in grams, age or estimated age, feeding notes, shed status, stool quality, and any husbandry changes. It also helps to note enclosure temperatures and humidity, since reptiles may lose weight or stop eating when environmental conditions are off.

A useful log entry might read: 03/15/2026 - 18.4 g - ate gecko diet well - shed 2 days ago - normal stool - active at night - warm side 74 F. Over time, this kind of record helps your vet connect weight changes with appetite, shedding, breeding activity, or enclosure issues.

Call your vet sooner if your crested gecko is steadily losing weight, not gaining as expected while growing, refusing food, acting lethargic, or showing diarrhea, retained shed, swelling, or trouble climbing. A single low reading may be noise. A downward trend over several weigh-ins is more meaningful.

See your vet immediately if weight loss happens along with weakness, dehydration, sunken eyes, severe lethargy, breathing changes, dark stress coloration that does not improve, or inability to grip and climb normally. These signs can point to husbandry problems, parasites, metabolic bone disease, infection, reproductive issues, or other illnesses that need veterinary care.

Crested geckos are sensitive to enclosure conditions. PetMD lists a warm side around 72 to 75 F and a cool side around 68 to 75 F, and warns that prolonged temperatures above 80 F can lead to overheating. In reptiles, poor temperature support can reduce digestion and appetite, which may show up first as stalled growth or weight loss.

Regular veterinary visits matter too. VCA notes that reptiles should have annual health exams and that weight is part of the routine assessment. Bringing your weight log, photos of the enclosure, and details about diet, lighting, and supplements can make that visit much more productive.