Bearded Dragon Weight Chart by Age
| Hatchling (1 month) | ~5–15g |
| Juvenile (6 months) | ~150–280g |
| Adult | ~350–550g |
Why length and condition matter more than weight alone
Bearded dragons vary meaningfully in adult size by line and sex — German Giant lines run notably larger — so a single weight target is less reliable than checking body condition: a tail base thicker than the neck signals good reserves, a tail thinner than the neck or visible hip bones signal underweight.
Rough weight ranges by age
3 months: roughly 40–100g. 6 months: roughly 150–280g. 12 months (approaching adult size): roughly 300–450g. Full adult: commonly 350–550g, with larger lines exceeding that.
Overweight is now the more common problem
In captivity, overweight and obese adult dragons are considerably more common than underweight ones, almost always from feeding an adult too many insects relative to veg. A visibly bulging tail base and rounded, padded limbs are signs to cut back protein and increase activity opportunities.
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A single adult bearded dragon needs a minimum 4ft x 2ft x 2ft enclosure, with 6ft x 2ft x 2ft increasingly recommended as best practice — plus a linear T5 HO UVB tube, an overhead basking bulb on a thermostat, a real thermal gradient, a sturdy basking platform, and a shallow water dish.
A complete bearded dragon setup needs a 4ft+ enclosure, a linear T5 HO UVB tube, an overhead basking bulb on a thermostat, two thermometers, a basking platform, a hide, a shallow water dish, and age-appropriate substrate — all running and stable for at least 48 hours before the dragon arrives.
Hatchlings can start in a 20-gallon long tub, juveniles need to move to roughly a 40-gallon breeder footprint by a few months old, and adults need a minimum 4ft x 2ft x 2ft enclosure, with 6ft x 2ft x 2ft recommended.
Basking surface temperature should run 95–110°F depending on age (hotter for hatchlings, cooler for adults), with a cool side around 75–85°F, all provided by an overhead basking bulb on a thermostat — not a heat mat or heat rock.
Bearded dragons need a linear T5 HO UVB tube at 10.0 or 12% output, running the length of the basking third of the enclosure with nothing between bulb and dragon, replaced every 6–12 months regardless of whether it still produces visible light.
Bearded dragons should be kept at roughly 30–40% ambient humidity. Sustained humidity above 50% significantly raises the risk of respiratory infection in this dry-climate species — brief daily misting or a shallow soak handles hydration and shedding needs without pushing ambient humidity up long-term.