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Care, Health and Growth, Crested Geckos, Geckos

Crested Gecko Size and Growth Chart Guide 2023

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by The Pet Engineers


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If you are new to the world of reptile enthusiasts, you may be wondering which reptile would suit you best.

And one such important consideration to make is the size of the reptile.

This will determine how big of a tank you need, and depending on whether or not you have the space and resources for it, you can opt to go for that reptile.

In this article, we discuss the size and developmental stages of a crested gecko.

Key Takeaway:
Crested geckos take 2-3 years needed to reach their full size and weight. Proper diet, good habitat set-up, heating and lighting are needed to a healthy growth.

How To Measure A Crested Gecko Weight?

When you become the pet owner of a crested gecko, you will have to regularly measure its weight.

Drastic weight changes are often overlooked symptoms of many illnesses.

If you notice a drastic unexplainable weight gain or reduction, you should probe further because it can be an early sign of some underlying health condition.

There is a very easy way to measure the weight of your crested gecko.

  1. Take a plastic container with a lid. Make holes in the lid for airflow.
  2. Weigh the plastic container with the lid on. Note that down as the weight of the empty container. (For instance, 10 g)
  3. Next, place your crested gecko in the container and put the lid on. Make sure you’ve made enough holes to allow ample airflow without allowing the crested gecko to escape.
  4. Then weigh your crested gecko in the lid and note it as the weight of the container with the crested gecko. (For instance, 45 g)
  5. Finally, subtract the weight of the empty container from the weight of the container with the crested gecko. (45 g – 10 g = 35 g)

This will give you the weight of your crested gecko. Make sure to note down the date and weight of your crested gecko in a record book.

Maintain the weight record regularly.

Monitor the weight changes of your crested gecko to ensure that there are no drastic weight changes that go unnoticed.

Crested Gecko Growth & Size Chart (Age, Weight, And Length)

The following table gives you the growth chart of a crested gecko.

Hatchling1.5 to 2 grams2.5 to 3 inches
Baby (2 months)3 grams3 to 4 inches
Juvenile (3 months)4 grams3 to 5 inches
Juvenile (4 months)5 grams4 to 6 inches
Juvenile (5 months)7 grams4 to 6 inches
Juvenile (9 months)16 to 35 grams6 to 9 inches
Adult (12 months)35 to 50 grams9 to 16 inches
Adult (18 to 24+ months)35 to 55+ grams9 to 16+ inches
Crested gecko growth chart


Crested Gecko Development Stages

two baby crested geckos
Baby crested geckos

A crested gecko’s development stages can be categorized into 3 age groups: baby, juvenile, and adult.

Baby crested geckos are in the age group of 0 to 2 months. This is when they are anywhere between 2.5 and 4 inches, and weigh 1.5 to 3 grams.

Juvenile crested geckos are in the age group of 3 to 12 months. This is the phase of a crested gecko’s life when it is rapidly growing.

The juvenile age is the most important developmental stage of crested geckos.

Ensuring proper enrichment and diet in these ages can determine how strong your crested gecko’s immune system develops and how playful, active, and behaviorally healthy your crested gecko becomes.

In this age group, your crested gecko will grow from 3 inches at 3 months to close to 16 inches at 12 months.

The weight of your crested gecko will also go from 3 grams to close to 30 grams by the time it reaches 12 months of age.

Adult crested geckos are fully grown in terms of their physique. A crested gecko can reach its full growth anywhere between 12 and 18 months.

So, don’t worry if your crested gecko does not seem “fully grown” yet at 12 months of age. Every crested gecko has a different rate of growth and development.

Factors That Impact Growth Rate

There are several factors that impact the growth rate of your crested gecko.

1 – Diet

Diet is the most common factor that determines how well your crested gecko will grow.

A crested gecko’s diet needs to be rich in calcium and micronutrients. If your crested gecko gets the required amounts of all the required nutrients, it will grow comfortably.

On the other hand, if your crested gecko experiences a deficiency in any of the important nutrients, especially calcium, it will have a slow growth rate.

In extreme cases, it can also lead to deformed or stunted growth of your crested gecko. A malnourished crested gecko will not be able to grow normally.

Crested geckos are fruit and insect eaters

2 – Humidity and Temperature Levels

The environment of the crested gecko will also impact its growth rate.

If the humidity and temperature levels are imbalanced, your crested gecko will be prone to dehydration, bacterial and fungal infections, and other health issues that impact its appetite and growth.

It is very important to maintain the ambient range of humidity and temperature levels in the tank of your crested gecko.

The humidity should be between 60 and 80 percent and the temperature should be between 72 and 75 degrees Fahrenheit during the daytime and 60 and 72 degrees Fahrenheit at nighttime.

3 – Enclosure Size

An indirect but important factor that impacts the growth rate of a crested gecko is its tank size.

If you don’t have a tank size that’s suitable for your crested gecko, you may accidentally end up stressing your crested gecko out.

A baby crested gecko should not be kept in a very large tank. A large tank will make it difficult for a small crested gecko to find its feeding spots.

This can sometimes overwhelm the crested gecko, lead to stress, and consequently impact the appetite and nourishment of your pet.

On similar lines, if you have a very small tank for a big crested gecko, it will not have enough space for enrichment.

Crested geckos need physical activity in the form of foliage, jumping on branches, and running around the tank.

When this physical activity is hampered, it can lead to your crested gecko becoming lethargic.

This can again start impacting the appetite, nourishment, and thus the overall growth rate of your crested gecko.

4 – Social Environment

The social environment of a crested gecko is just as important as its habitat. Crested geckos are known to be solitary creatures.

A crested gecko will thrive best when it is living alone in its enclosure.

If you wish to cohabitate with your crested gecko with other reptiles, you should do so on a trial basis first. Check if your crested gecko is adapting well to cohabitation.

If your crested gecko is getting too stressed, it is best to keep it alone in its tank.

Forced cohabitation can lead to stress due to confrontations, resource competitions, territorial aggression, and bullying. All of this will impact the health and growth of your crested gecko.

two crested geckos
Crested geckos are solitary creatures

5 – Genetics

Lastly, the one factor that impacts the growth rate and is completely out of your control is the genetics of the crested gecko.

If it has inherited the dominant genes for greater size and heavier weight, it will grow accordingly. Else, it may remain relatively smaller and lighter.

Weighing And Measuring Your Crested Gecko

Weighing and measuring your crested gecko is important for the following reasons:

  1. Monitoring the size of your crested gecko will allow you to plan your pet’s meals accordingly.
  2. Having a record of the weight of your crested gecko will help you detect any early signs of illnesses.
  3. Knowing your crested gecko’s growth rate will give you a fair idea of any changes required in the husbandry of your pet.

How Big Is A Full-Size Crested Gecko?

A crested gecko reaches its full size anywhere between 2 and 3 years of age.

Owing to genetic and other factors, some crested geckos may even get their growth spurt as late as 24 months.

In general, female crested geckos tend to be bigger than male crested geckos in both size and weight.


Male crested geckos will reach an average weight of 25 to 35 grams and an average size of 10 to 18 inches.

However, at year 3 or 4, they may experience a growth spurt that brings them closer to the size of female crested geckos.


Female crested geckos will reach an average weight of 35 to 55 grams and an average size of close to 20 inches.

They are generally bigger than male crested geckos.

How Long Does It Take For A Crested Gecko To Get Full Size?

Crested geckos require a minimum of a year to reach their full sizes.

But the growth rate varies from one crested gecko to another depending upon several factors such as diet, environment, genetics, etc.

So, crested geckos can generally attain their full sizes between 12 and 18 months of age.

Some crested geckos take up to 24 months too! And by year 3 or 4, male crested geckos will experience yet another growth spurt that makes them almost as big as their adult female counterparts.

crested gecko balancing off leaf
It takes a crested gecko 2-3 years to reach full size

How Big Should A 6 Month Old Crested Gecko Be?

A crested gecko of 6 months should be weighing around 7 to 10 grams and should be around 4 to 6 inches in size.

However, your crested gecko may be a little lighter, heavier, shorter, or bigger than the generic values because the growth rates of crested geckos vary depending on a lot of factors.

Do Crested Geckos Have Growth Spurts?

Yes, crested geckos do have growth spurts. However, these growth spurts are only seen in male crested geckos.

When a male crested gecko becomes an adult, at 12 to 24 months of age, it is still relatively smaller than an average female crested gecko.

But, when the male crested gecko reaches 3 or 4 years of age, it experiences a growth spurt that makes it almost as big as its female counterpart.

What Is A Good Size Cage For A Crested Gecko?

The size of the tank you need will depend on the age of your crested gecko.

Hatchlings and Juveniles (<12g)5 gallons (8” X 8” X 12”)
Adults (>25g)Minimum 20 gallons (18” X 18” X 24”)
Multiple AdultsMinimum 30 gallons (18” X 18” X 36”)
Tank size for crested geckos

What To Do If Your Crested Gecko Is Overweight?

fat crested gecko
Overweight crested gecko

If your crested gecko is overweight, the following tips may help:

  1. Increase enrichment activities in the form of plants, branches, and substrates.
  2. Reduce the number of treats you give to your crested gecko.
  3. Slowly reduce the intake of food until the desired weight is achieved.
  4. Keep the humidity and temperature levels accurate to avoid inactivity due to lethargy.


Crested geckos are a great choice of pets even for beginner reptile enthusiasts.

Knowing the full size of a crested gecko will give you an insight into the tank and food requirements.

This will help you make an informed choice about whether or not you should go ahead with a pet crested gecko.

The Pet Engineers

A team of pet lovers. We have owned various pets over their years. From dogs to reptiles, etc. Our love of pets, strive to us to create up-to-date and accurate helpful guides on pets.

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