Bearded Dragon Size and Growth Chart by Age
A bearded dragon growth chart showing typical length by month from hatchling to adult, plus how fast they grow and when they reach full size.
Quick answer: A healthy bearded dragon grows from about 3 to 4 inches at hatching to 16 to 22 inches by 12 months, reaching a full adult length of 18 to 24 inches (including tail) by about 18 months. Adults weigh roughly 380 to 510 grams. Most growth happens in the first year, so steady gains during the baby and juvenile stages are the key sign of good husbandry.
Watching a bearded dragon grow from a tiny hatchling to a robust adult is one of the joys of keeping them. The chart below shows typical total length by month. Use it as a general guide, not a strict rule, since healthy dragons vary widely. What matters most is consistent, proportionate growth.
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Bearded dragon length by age
| Age | Typical length (with tail) | Stage |
|---|---|---|
| 0 to 1 month | 3 to 4 inches | Hatchling |
| 2 months | 5 to 9 inches | Baby |
| 3 months | 8 to 11 inches | Baby |
| 4 months | 9 to 12 inches | Juvenile |
| 6 months | 11 to 18 inches | Juvenile |
| 8 months | 13 to 20 inches | Juvenile |
| 12 months | 16 to 22 inches | Sub-adult |
| 18 months and up | 18 to 24 inches | Adult |
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What drives healthy growth
Three things power a dragon's growth: a correct basking temperature for fast digestion, strong UVB for calcium absorption, and plenty of protein during the baby and juvenile stages. A dragon that lags on the chart almost always has a gap in one of these. Before assuming small genetics, confirm the basking temperature and UVB are right and that the feeding schedule matches the dragon's age.
As your dragon grows, its enclosure should grow with it. A hatchling in a giant tank may struggle to find and catch food, while an adult in a small tank cannot thermoregulate properly. See the tank size by age chart to match the enclosure to each stage. If growth stalls despite good care, a reptile vet can check for parasites or other issues.
Frequently Asked Questions
How big do bearded dragons get?
A healthy adult central bearded dragon (Pogona vitticeps) reaches about 18 to 24 inches in total length, including the tail, which makes up roughly half. They typically weigh between 380 and 510 grams as adults. Most of this growth happens in the first year, with size leveling off by about 18 months. Genetics, diet, and husbandry all influence where an individual lands in that range.
How fast do bearded dragons grow?
Bearded dragons grow very quickly in their first year, often gaining an inch or more per month during the baby and juvenile stages. A hatchling of 3 to 4 inches can reach 16 inches or more by its first birthday. Growth then slows through the sub-adult stage and largely stops by 18 months. Steady, proportionate growth matters more than hitting an exact number each month.
At what age is a bearded dragon full grown?
Bearded dragons reach close to their full length by about 12 months and are considered fully grown by 18 months, though they may continue to fill out and gain a little weight until around 2 years. The fastest length gains happen in the first 6 months. After 18 months you should see weight stability rather than continued length increases.
Why is my bearded dragon small for its age?
A dragon that lags behind the size chart is often dealing with a husbandry problem rather than just genetics. Common causes include a too-cool basking spot that slows digestion, weak or expired UVB, not enough feeder insects during the growth stages, parasites, or stress from an oversized or shared enclosure. If growth has stalled despite good care, a fecal test and exam from a reptile vet are worthwhile.
How big is a 6 month old bearded dragon?
A 6 month old bearded dragon is usually around 11 to 18 inches long, sitting in the middle of its rapid growth phase. There is wide individual variation at this age, so a dragon at either end of that range can still be perfectly healthy. Focus on whether your dragon is eating well, active, and gaining steadily rather than matching an exact length.
Do males and females differ in size?
Males tend to be slightly larger and have broader heads and thicker tail bases, while females are often a touch smaller and slimmer. The difference is modest in central bearded dragons, so size alone is not a reliable way to sex a dragon. Both sexes fall within the same general 18 to 24 inch adult range when raised with good heat, UVB, and nutrition.
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