Bearded Dragon Size Chart by Age

Last updated: · Reviewed against sources listed below

This bearded dragon size chart shows typical length and weight by age. Most bearded dragons reach 16–24 inches and 380–510 grams by 18 months. Growth is fastest in the first six months, so compare your dragon with the chart every month rather than every week.

Measure by

Weigh on a kitchen scale before feeding.

This is our reptile age and growth estimator, preset for bearded dragons.

Bearded Dragon growth chart by age

Total length is measured from snout to tail tip. Ranges cover healthy captive dragons; individuals vary. Use the °F / in button at the top of the page to switch to centimeters.

AgeTotal lengthWeight
Hatchling3–4 in8–10 cm4–6 g (0.14–0.21 oz)4–6 g
1 month3–5 in8–13 cm4–10 g (0.14–0.35 oz)4–10 g
2 months5–9 in13–23 cm8–40 g (0.3–1.4 oz)8–40 g
3 months8–11 in20–28 cm28–60 g (1–2.1 oz)28–60 g
4 months9–12 in23–30 cm40–110 g (1.4–3.9 oz)40–110 g
5 months11–16 in28–41 cm80–200 g (2.8–7.1 oz)80–200 g
6 months11–18 in28–46 cm110–250 g (3.9–8.8 oz)110–250 g
7 months13–18 in33–46 cm150–280 g (5.3–9.9 oz)150–280 g
8 months14–20 in36–51 cm230–300 g (8–11 oz)230–300 g
9 months16–20 in41–51 cm250–350 g (9–12 oz)250–350 g
10 months16–22 in41–56 cm260–380 g (9–13 oz)260–380 g
12 months16–22 in41–56 cm350–450 g (12–16 oz)350–450 g
18 months16–24 in41–61 cm380–510 g (13–18 oz)380–510 g

How big do bearded dragons get?

An adult bearded dragon is usually 16–24 in41–61 cm long from snout to tail tip and weighs about 380–510 g (13–18 oz)380–510 g. Males tend to be larger than females and have broader heads. Some “German giant” bloodlines can exceed 600 g, while some morphs, such as leatherbacks, can look smaller without being unhealthy.

Most dragons reach close to adult length by 12 months and fill out in weight until about 18–24 months. After that, growth stops, and weight changes mostly reflect diet and body condition.

How to measure your bearded dragon

Weigh your dragon on a digital kitchen scale in grams, using a small box or container and subtracting its weight. For length, let your dragon rest on a flat surface and lay a soft tape measure along its back from snout to tail tip, or photograph it next to a ruler. Measure at the same time of day, before feeding, for consistent numbers.

Why is my bearded dragon growing slowly?

A dragon at the bottom of the range can be perfectly healthy. Slow growth is worth looking into if your dragon is well below the range, has stopped growing, or looks thin at the base of the tail and hips. Common causes include:

  • Temperatures too low. A cool basking spot slows digestion and appetite.
  • Weak or old UVB. Without UVB, calcium is not absorbed well and bones grow poorly.
  • Too few insects when young. Babies need protein several times a day.
  • Parasites. A fecal test at the vet can rule these out.
  • Competition. Dragons housed together often compete for food and heat; one may be stunted.

If your dragon is losing weight, has a swollen or soft jaw, bumpy limbs or tremors, see a reptile vet promptly. These are signs of metabolic bone disease, which needs treatment rather than extra food.

Frequently asked questions

How fast do bearded dragons grow?

Very fast in the first months: most double or triple their length between 1 and 6 months. By 12 months they are near adult length, then they fill out in weight until about 18–24 months. Growth depends on heat, UVB, diet and genetics.

When is a bearded dragon full grown?

Most bearded dragons reach adult length around 12 months and are fully grown between 18 and 24 months. After that, weight should stay fairly stable. Sudden gain usually means too many insects; sudden loss is a reason to see a reptile vet.

Sources

Where sources disagree we show the range they share. See our sources and methodology for how every number is checked.

Results are estimates for healthy animals. Always consult a reptile veterinarian for individual advice. Read our disclaimer.

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