X-Rex
Variant
X-Rex Egg & Breeding Calculator
The X-Rex reproduces by laying fertilized eggs after mating. 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.
Full maturation from baby to adult takes ~3 days and 20 hours (1x rate), progressing over many real-world days, demanding serious time investment. During the baby phase (0–10%), hand-feed it directly. From 10% onward (juvenile), it can eat from a Feeding Trough.
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.
Maturation has three phases: 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.
Imprint bonuses are significant: a fully imprinted X-Rex gains 30% extra damage and damage resistance with its imprinter mounted. You'll be asked to cuddle, walk, or feed specific kibble at regular intervals during maturation.
Incubation Time
4h 59m 58s
Elapsed Time
4h 37m 47s
Maturation Time Left
87h 57m 46s
Time to Juvenile
4h 37m 47s
Total Food Items
3934
items
Food to Adult
2567
items
Food Per Hour
81
Food Capacity
250
items
Baby Hand Feed For
1h 1m 55s
6.1% maturation
Cuddle Interval
0s
Imprint Per Cuddle
0%
Max Imprint
0.0%
Use the raising calculator to plan food requirements for raising X-Rex babies through all three growth stages. Budget ~556 minutes for the Baby phase - this is when hand-feeding or Maewing nursing is mandatory.
Adjust the dino count to calculate food for multiple X-Rex babies at once - essential for batch breeding operations. Consider food spoilage when choosing what to feed: Kibble lasts days, while Raw Meat spoils in minutes.
Raising CalculatorFrom 5% - use slider above to adjustFood per item
50
Stack size
40
Eats at 5%
67.27 food/min
Maturation
92h 35m 33s
| Phase | Duration |  Raw Meat |
|---|---|---|
 BabyNeed this much for 5% to 10% | 4h 37m 46s | 364 |
 JuvenileNeed this much for 10% to 50% | 37h 2m 13s | 2,203 |
 AdolescentNeed this much for 50% to 100% | 46h 17m 46s | 984 |
 Total | 87h 57m 46s | 3,551 |
WeightFeeding Trough
2,400 items(60 slots)
Need 2 full loads
Tek Trough
4,000 items(100 slots)
Fits in one load
Maewing / Maeguana
300 slots
50% 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.
ARK: Survival Ascended features the X-Rex as a tamable, carnivore creature that survivors will encounter in the wild. It belongs to the Variant category.
Its base Melee Damage sits at 105%, giving it solid damage output. The X-Rex has 1,067 base Health - quite durable. Stamina sits at 420 base, providing good endurance. Weight capacity starts at 500, giving it an enormous weight pool.
To tame the X-Rex, you need to knock it unconscious using torpor weapons, then feed it while it's down. For best results, use Exceptional Kibble - it gives the highest taming efficiency.
As a tame, the X-Rex is primarily used for resource harvesting, excelling at gathering specific materials. Breeding produces fertilized eggs that hatch within a 32°C–34°C temperature window. A wild X-Rex is worth 30 base experience when killed. It can be cloned at a Cloning Chamber for 0.87 Element plus 0.01 Element per level.