Rex
CreatureDMG
Breeding calculator
Rex
SettingsHatch 1× · Mature 1× · Food 1× · Weight 500
Baby: The hatched dinosaur, now a baby, needs constant attention and food placed directly in its inventory to survive, or a nearby Maewing to take care of its needs.
- Incubation
- 4h 59m 58s
- Maturation
- 92h 35m 33s
- Incubation temperature
- 32 - 34 °C
- Food at birth
- 70.81/min
Maturation Progress
- Status:
- Baby
- Time Left:
- 87:57:46
- Total Time:
- 92:35:33
Maturation
- Incubation Time
- 4h 59m 58s
- Elapsed Time
- 4h 37m 47s
- Maturation Time Left
- 87h 57m 46s
Time to Juvenile- 4h 37m 47s
Food
- Total Food Items
- 3934items
- Food to Adult
- 2567items
- Food Per Hour
- 81
Food Capacity- 250items
Baby Hand Feed For- 1h 1m 55s6.1% maturation
Imprinting
- Cuddle interval
- 8h
- Imprint per cuddle
- 8.8%
- Maximum imprint
- 96.8% (11 cuddles)
Settings8 h · interval ×1 · amount ×1
Raising food
- Food per item
- 50
Stack size- 40
- Eats at 5%
- 67.27 food/min
- Maturation
- 92h 35m 33s
| Stage | Time remaining | Food points | Raw Meat | Stacks | Weight |
|---|---|---|---|---|---|
| BabyNeed this much for 5% to 10% | 4h 37m 46s | 18,194 | 364 | 10 | 36.4 |
| JuvenileNeed this much for 10% to 50% | 37h 2m 13s | 110,146 | 2,203 | 56 | 220.3 |
| AdolescentNeed this much for 50% to 100% | 46h 17m 46s | 49,172 | 984 | 25 | 98.4 |
| Total | 87h 57m 46s | 3,551 | 91 | 355.1 |
Total: 3,551 Raw Meat
- Feeding Trough
- 2,400 items (60 slots)Need 2 full loads
Tek Trough- 4,000 items (100 slots)Fits in one load
- Maewing / Maeguana
- 300 slots50% weight reduction on meat & berries
- Baby - 7x trough refills needed (food spoils before phase ends)
- Juvenile - 56x trough refills needed (food spoils before phase ends)
- Adolescent - 70x trough refills needed (food spoils before phase ends)
Spoils in 10m | Trough / Maewing: 40m | Tek Trough: 16h 40m
During the Baby phase (0-10%), you must hand-feed or use a Maewing to nurse. From Juvenile (10%+), dinos can eat from a Feeding Trough on their own. Use Preserving Salt in troughs to double spoil times.
More about breeding the Rex
Breeding the Rex produces fertilized eggs that require careful temperature control. Incubation temperature must stay between 32°C and 34°C - use Air Conditioners, Standing Torches, or Dimetrodons to maintain the range. At the correct temperature, the egg hatches in approximately 4 hours and 59 minutes.
After hatching or birth, the baby Rex matures over an extremely long period, one of the longest in the game, reaching adulthood in about 3 days and 20 hours at 1x maturation. The most labor-intensive part is the baby phase (0–10% maturation) when it can't use a Feeding Trough yet.
Offspring inherit parental stats and have a small chance to mutate, gaining +2 levels in a random stat. Use the breeding calculator to plan food requirements, incubation timers, and maturation phases.
The Rex's growth progresses through three stages: Baby (0–10%) lasts ~556 min and requires constant hand-feeding. Juvenile (10–50%) spans ~37h - it can eat from a Trough now. Adolescent (50–100%) takes ~46h - continues eating from troughs, nearly fully grown.
Imprinting during maturation provides permanent stat bonuses. At 100% imprint, the Rex gains 30% bonus damage and resistance when ridden by the imprinter. Keep various kibble types on hand, as imprint requests are randomized between cuddles, walks, and kibble feeding.
Planning a mass raise? The Rex raising calculator breaks down food needs per phase so nothing goes to waste. The Baby phase (0–10%) takes ~556 minutes and is the most hands-on, requiring direct feeding or a Maewing.
Raising multiple Rex simultaneously? Set the dino count and the calculator scales food requirements automatically. Match your food choice to your play schedule - longer spoil timers mean less babysitting.
Found throughout the ARKs, the Rex is a tamable, carnivore creature in ARK: Survival Ascended. Classified under the DMG group.
With 1,100 base Health, the Rex is quite durable. With 100% base Melee Damage, the Rex has solid damage output. Stamina sits at 420 base, providing solid stamina reserves. Weight capacity starts at 500, giving it massive inventory space.
Taming the Rex requires rendering it unconscious first - use Tranq Arrows, Darts, or Shocking Tranq Darts to apply torpor. Feed it Exceptional Kibble for the fastest tame and highest effectiveness bonus.
After taming, the Rex is valued for its harvesting efficiency, collecting key resources faster than most tools. It reproduces by laying eggs, which must be incubated between 32°C and 34°C. Defeating one in the wild grants 30 base XP. It can be cloned at a Cloning Chamber for 0.87 Element plus 0.01 Element per level.