The Best Size Tank For A Happy Bearded Dragon (Baby – Adult)

When it comes to giving your bearded dragon ample room to hunt, play, and explore… you definitely don’t want to underestimate their tank size! 

Giving your beardie a habitat (opens in new tab) that is too small can not only lead to stunted growth if they’re a juvenile, but can actually lead them to become depressed, stressed, and in some instances, developing health issues!

To discover what size tank to get your bearded dragon at any age, just keep reading! Or feel free to use the quick navigation below to be taken to a specific topic.

How Big Does a Bearded Dragon Tank Need to Be?

When it comes to having the best tank for bearded dragons, you’re primarily going to want to consider their age.

Only once the dragon is fully grown does overall size come in to play.

Baby bearded dragons will do best in tanks no smaller than 20 gallons and ideally 40 gallons (36 inches long X 18 inches wide X 18 inches deep).

Young adults and adults should have at minimum a tank of 55 gallons, but ideally 75 gallons.

Large dragons over 20 inches will do best in tanks at 75 gallons, but should really be given a tank of 120 gallons, as this will really allow for them to roam around and get their exercise.

For exceptionally large dragons, it is really doing them a disservice to be in anything less than 120 gallons, unless you plan on giving them hours of supervised play time outside of their tank every single day!

Tank Size for Baby Bearded Dragon

If you have a baby bearded dragon, under 10 inches or so, then a 20 gallon tank is fine to house them in temporarily.

Babies don’t need a whole lot of room to exercise and too large of a tank can actually make catching their food very difficult for them!

Baby bearded dragon basking temperature
Baby bearded dragons under 10 inches can live happily in a 20 gallon tank.

Remember, all baby creatures need time to become stealthy hunters and as such, your baby bearded may struggle to catch his food should you give it plenty of room to run away.

Can a Baby Bearded Dragon Live in a 40 Gallon Tank?

Babies can live in a 40 gallon (38 inches long X 18 inches wide X 18 inches deep) tank, though I wouldn’t necessarily recommend going much bigger if you can help it!

If you house a baby in a tank of this size or larger, keep a close eye on them and observe how adeptly they are able to actually catch and eat their live food, primarily crickets.

If they seem to be struggling, you will definitely want to hand feed them.

Hand feeding a bearded dragon
Bearded dragons struggling to catch feeders in large tanks should be hand-fed.

Tank Size for Full Grown Bearded Dragons

Again, depending on the size of your adult bearded dragon the tank size will vary!

Regular adult bearded dragons should be in a tank at least 55 gallons, but ideally 75 gallons. 

Dragons upwards of 20 inches should be kept in a tank no smaller than 75 gallons and ideally 120 gallons.

Remember, giving your dragon ample room to roam in his tank will not only make him happier, but healthier as well!

How Long Does it Take for a Bearded Dragon to Grow to Full Size?

Bearded dragons grow rather quickly, so don’t be alarmed if your itty-bitty baby suddenly needs an upgraded tank within a few months!

This is simply just part of owning a bearded dragon.

how big do bearded dragons get
Bearded dragons grow rather quickly, with most reaching full size by 18 months!

The rate at which bearded dragons grow will vary depending on their genetics and diet, but typically you can expect to see your dragon reach full size around 15 to 18 months.

However, that isn’t to say your dragon can’t expand in girth still, especially if you are overindulging them with too much food.

Best Size Tank for 2 Bearded Dragons

Although housing two bearded dragons is very risky (dragons can often be territorial and fight), if you absolutely must go this route then you should really combine two 75 gallon tanks or have something of similar size (at a minimum) built.

However, I will never advise you to house two dragons together UNLESS they were hatchlings together and have never been separated and get along swimmingly.

But still, I highly recommend keeping a close eye and having an additional cage ready in case you need to rescue one.

It’s not uncommon for siblings (especially males) to turn on one another as they get older!

Two bearded dragons sharing the same tank
Even hatchling can become territorial and fight when sharing 1 enclosure.

This can lead to fights, injuries, food hogging, and even one dragon laying claim to the basking spot and refusing to share!

Just be really careful if you go this route. The consequences can be deadly.

When Should You Get a Bigger Tank for Your Bearded Dragon?

If you’re on a budget, you can always start with a “baby” sized tank between 20 – 40 gallons and size up to something between 75 and 120 gallons once your beardie is 10 inches long.

20 gallons is really only going to be fit for a beardie below 10 inches, and since they grow rather fast, this may only be 3 months or less!

It’s best in my opinion, to start out with a 55 gallon tank and upgrade them to a 120 gallon once they reach around 15 inches.

If you need help selecting a vendor, I use and highly recommend Carolina Custom Cages to house your beardie. They offer a wide variety of sizes and good deals on terrariums.

Remember, 120 gallons is going to provide them with so much more space and entertainment, giving them a happier life.

Wrapping  Up Bearded Dragon Tank Size

I hope this article provided you with the clarity you need to buy your beardie an awesome tank!

One last word of advice, it is always better to go bigger than smaller… so if you can afford the extra space 100% go for it!

Your beardie’s happiness and health are more than worth it.

If you found this article helpful for taking care of your bearded dragon, then you might also be interested in the best turtle tank ideas or the best frog tank setups for your pets!

24 thoughts on “The Best Size Tank For A Happy Bearded Dragon (Baby – Adult)”

    • Hello Victoria.

      The tank size will depend on the age of the bearded dragon. Please read the article above, it should guide you on what size to get.

  1. Hi, I have a new bearded dragon that is about 9 inches long(nose to end of tail) and currently have him in a 36in x 18in x 18x enclosure. I have a new Zen Habitats enclosure, 4ft x 2ft x 2ft, that I would like to put him in but is he too small? He currently gets his live bugs, dubias and crickets, in a ceramic bowl so he wouldn’t be chasing his food around the tank and I would keep a close eye on him to ensure he doesn’t seem to stressed but if it’s not recommended I will wait to put him in the new enclosure. Thanks in advance for any advice you could provide!

    • Hi Michael!

      So, you’re going to want to keep them separate. I can guarantee if you keep them all together, even regardless of their genders, there will be fights, food and basking light hogging, injuries, and potentially even death. Beardies are VERY territorial. Even housing babies and juveniles together is a bad idea. Please do not house them together. As far as discerning their gender, check out this article on how to sex your bearded dragon.

      Hope this helps!

      • Hi my name is shaylah I am ten I want a dragon but I have to buy it could a adult for in a 75 gallon tank and what do I feed it reptile food

        • Hey, my name is Chloe, I am 11. I want one too! I have to buy my own too! An adult can live in a 75 gallon, but a more cheaper option is a 55 gallon. You should wait until your local Petco’s $1 a gallon sale, it saves you a lot of money! They need one UV light, a heat lamp, a basking lamp, a basking decor and other decor, reptile carpet, a food and water dish, and that’s it. This all comes to about $275, and I know its a lot… But try and earn money, and save it! They eat mealworms, superworms, dubia roaches, crickets, and salad. They don’t have to be fed ALL of those. For the salad kale,collard greens, and some red or orange bell peppers to encourage them to eat. They can also eat beardie pellets, and for extra fun you can get a beardie ball from PetSmart for $5, you put mealworms or small pellets for them to get out! Good luck!

          Beardie names:

    • Hi Linda!

      A 120 gallon tank is an awesome investment that provides more than enough room for an adult bearded dragon to thrive in. For a baby, it would be much too big and can even impeded their ability to catch food. But, if your bearded dragon is fully grown (or nearing that) then it’s a wise one time investment.

      Here’s my absolute favorite 120 gallon tank by a brand I’ve always had positive experiences with.

  2. hey..i was considering on getting a baby bearded dragon..but the problem is..i only have a 75 gallon there maybe a way i can divide it for now? without getting a new tank

    • Hi Tenniel!

      You can always cut a piece of cardboard to divide off some of the tank. If your baby is older (say 5 months or so), I’d just consider letting them have the whole tank as is. Too large of a tank can become a problem if they’re struggling to catch and eat their feeders, so just watch how he or she does when meal time comes around. If feeders are evading them, then go ahead and use the cardboard. Otherwise, it’s probably fine.

      Hope this helps!

  3. Hi!
    My husband and I just bought a 1yr old bearded dragon- we built her a custom enclosure that is 3 different levels; my question is, as long as we have branches for her to climb up, and a couple hammocks, will that set up be ok? I know there isn’t such thing as an enclosure that’s “too big”, but she hasn’t really explored her bottom level yet (then again, it has only been about 24hrs that we have had her!). Do you think she will?

    • Hi Kelly!

      That enclosure sounds so cool! I’m sure she’ll come around to it. Just make sure she can’t fall from the higher levels as beardies are not natural climbers per se and can fall quite easily. Also, make sure everything is secured and can’t fall on her.

      It sounds like you’ve spoiled her with tons of room and I’m sure she’ll love the enclosure as she adapts. One thing you could do is take a little time to review proper bearded dragon lighting and temperatures as I have found this area to be the MOST challenging thing to get right for new owners. I know it certainly was for me way back in the day.

  4. Hi, So I’m wanting to repurpose a dresser for an adult bearded dragon. Question about size though. When they say 4ft by 2ft by 2ft, should it be 2ft wide? Being smaller in width, would that be an issue as long as the enclosure is longer… say mabye 5ft long by 18inches wide, by 2-3ft tall? Obviously don’t want to make it feel cramped in any direction. Thanks!

  5. Hi my name is shaylah I am ten I want a dragon but I have to buy it could a adult for in a 75 gallon tank and what do I feed it reptile food

  6. I have a baby bearded dragon just under 7” long. I’m told he is about 2-3 months old. He’s currently in a 10 gal but I just got a 30 gal to set up for him instead. My question is: what watt basking light and uvb light would I need for the 30 gal tank? Also, he doesn’t look like he touches the pellet food they told me to buy… is it okay he’s just on crickets, wax worms and his fresh veggies? Any help would be appreciated.

  7. Hi, I am working on getting a bearded dragon. I plan to get a baby. With my current situation the biggest tank I can get is 36 x 18 x 18 and I likely won’t be able to get bigger for a few years. I just don’t have the space. Would it be irresponsible to get a bearded dragon? Also, if not, do you have any tips on how to make the most of the space for the little guy?

  8. I’m looking into getting a beardie, would it be okay to buy the bigger tank from them being a baby? Could I divide it with a peice of cardboard just at meal times if he is struggling with catching food?


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