Rex
CreatureDMG

Rex taming calculatorKnockout
Taming the Rex requires applying enough torpor to knock it out. Use tranquilizer projectiles, then place food in its inventory. The Rex loses Torpor at 0.73 per second while unconscious - stay on top of narcotics.
- Wild level150
- Tamed level224+74
- Max level after leveling297
Taming foods
| Food | Amount | Taming time | Effectiveness | Feeding interval |
|---|---|---|---|---|
| 57m 59s | 98.69%+74 Lvl (224) | 3m 25s | ||
| 1h 10m 1s | 94.48%+70 Lvl (220) | 2m 1s | ||
| 1h 26m 1s | 91.76%+68 Lvl (218) | 2m 1s | ||
| 2h 7m 52s | 83.47%+62 Lvl (212) | 2m 0s | ||
| 2h 51m 49s | 73.55%+55 Lvl (205) | 2m 0s | ||
| 1h 48m 1s | 63.9%+47 Lvl (197) | 1m 1s | ||
| 4h 18m 1s | 55.25%+41 Lvl (191) | 2m 1s | ||
| 3h 40m 54s | 30.75%+23 Lvl (173) | 1m 2s | ||
| 4h 18m 1s | 23.57%+17 Lvl (167) | 1m 1s | ||
| 5h 23m 1s | 16.46%+12 Lvl (162) | 1m 1s | ||
| 5h 22m 31s | 4.71%+3 Lvl (153) | 31s |
Required narcotics
0Narcotics
0Narcoberries
0Bio Toxin
0Ascerbic Mushrooms
Knockout weapons
Bow172 Normal hits0% Death chance
Crossbow98 Normal hits0% Death chance
Fabricated Crossbow (Tranq Arrow)98 Normal hits0% Death chance
Fabricated Crossbow (Tranq Spear Bolt)51 Normal hits0% Death chance
Tranquilizer Dart70 Normal hits0% Death chance
Shocking Tranquilizer Dart35 Normal hits0% Death chance
Tek Bow46 Normal hits0% Death chance
Compound Bow127 Normal hits0% Death chance
Harpoon Launcher51 Normal hits0% Death chance
Starve & Torpor Timers
Rex taming video guide
More about taming the Rex
Check the taming results to see how long it takes to tame the Rex, what effectiveness you'll achieve, and how many bonus levels it gains. Better food means better results.
Below is a breakdown of knockout weapon requirements for the Rex across various creature levels. Always pace your shots. Torpor takes time to apply, and over-shooting can be lethal.
To simplify the knockout, immobilize the Rex first with Chain Bola or Bear Trap. Alternatively, use a Tusoteuthis to airlift it into a pre-built trap.
The table shows how many sedatives you'll need to keep the Rex unconscious through the full taming duration. Bio Toxin is twice as potent as Narcotics (80 vs 40 Torpor per use), while Narcoberries work in a pinch at just 7.5 Torpor each. At 0.73 Torpor drain per second, apply narcotics proactively - a wakeup mid-tame wastes everything.
Use the torpor and starve timers to track your Rex tame in real time. Torpor monitoring prevents premature wakeups. The starve timer is for the starve-tame method - let Food drop, then load all kibble at once to avoid waste.
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.