Wondering how old your bearded dragon is — or whether it’s growing at the right pace? While you can’t tell an exact age without a hatch date, size is the best clue, because bearded dragons grow on a fairly predictable schedule.
This guide provides a bearded dragon growth chart by age and how to estimate age from size.
Bearded Dragon Growth Chart by Age
| Age | Approximate length | Notes |
|---|---|---|
| Hatchling (0–1 month) | 3–4 inches | Tiny, fragile, fast-growing |
| 2 months | 5–9 inches | Rapid growth phase |
| 3 months | 8–11 inches | Still growing quickly |
| 6 months | 11–16 inches | Juvenile; growth slows slightly |
| 9 months | 14–18 inches | Approaching adult size |
| 12 months | 16–20 inches | Considered adult |
| 18–24 months | 16–24 inches | Full adult size |
Note: these are averages. Growth depends heavily on diet, temperatures, UVB, and genetics — a dragon with poor care will grow slower and stay smaller.
How to Estimate a Bearded Dragon’s Age
- Under 6 inches: likely under 2 months old.
- 6–12 inches: roughly 2–6 months.
- 12–16 inches: roughly 6–10 months.
- 16–20 inches: around a year old.
- 20+ inches: adult.
Remember: size alone isn’t exact. Two dragons of the same age can differ by several inches based on care and genetics.
How to Measure Your Bearded Dragon
- Measure from the tip of the nose to the tip of the tail (not just the body).
- Use a soft measuring tape, or place your dragon on a ruler/tape measure while it’s calm.
- Measure a few times and take the average — dragons squirm.
Is My Dragon Growing Properly?
- A dragon growing slower than the chart may have a husbandry problem — check UVB, calcium, temperatures, and diet.
- Sudden growth stalls or weight loss can indicate parasites or illness — see a reptile vet.
Disclaimer: This guide is for general education and does not replace professional veterinary advice.