Oxygen Not Included Critter Feed Comparison (KG Per Cycle)
Compare 12 Oxygen Not Included critter feed rates, from Pacu 7.5 kg to Hatch 140 kg per cycle. Klei diet intakes with tame metabolism math explained. See rows.
Visual comparison
All values
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| Name | Value | Context | Source |
|---|---|---|---|
| Hatch Eats sandstone, sand, clay and dirt. Leaves 70 kg coal. | 140 kilograms | Common Hatch rock diet, tame and satisfied | ONI Wiki Hatch page: diet 140 kg/cycle rock to 70 kg coal; ONI Wiki Metabolism page: Hatch eats 140 kg per cycle at 100% |
| Stone Hatch Eats igneous rock, obsidian and granite. Same 140 kg intake as Hatch. | 140 kilograms | Stone Hatch hard rock diet | ONI Wiki Hatch page: Stone Hatch diet 140 kg/cycle hard rock to 70 kg coal |
| Sage Hatch Eats dirt, slime, algae and fertilizer. Returns full 140 kg mass as coal. | 140 kilograms | Sage Hatch organic diet | ONI Wiki Hatch page: Sage Hatch diet 140 kg/cycle organics to 140 kg coal |
| Smooth Hatch Eats copper, iron and cobalt ore. Only morph that makes refined metal. | 100 kilograms | Smooth Hatch metal ore diet | ONI Wiki Hatch page: Smooth Hatch diet 100 kg/cycle metal ore to 75 kg refined metal |
| Pokeshell Takes 70 kg of either food. Excretes 35 kg sand. | 70 kilograms | Pokeshell polluted dirt and rot pile diet | ONI Wiki Pokeshell page: diet 70 kg/cycle polluted dirt to 35 kg sand; 70 kg/cycle rot pile to 35 kg sand |
| Oakshell Same 70 kg intake as Pokeshell. Sheds molt for lumber. Math: 116.67 times 600 divided by 1000. | 70 kilograms | Oakshell morph living in ethanol | ONI-DB Oakshell page: diet polluted dirt 116.67 g/s, equals 70 kg/cycle over 600 s |
| Puft Breathes polluted oxygen. Excretes slime at 95 percent of intake. Math: 83.33 times 600 divided by 1000. | 50 kilograms | Puft polluted oxygen diet | ONI-DB Puft page: diet polluted oxygen 83.33 g/s, equals 50 kg/cycle |
| Puft Prince Lower 30 kg intake. Excretes slime, bleach stone or oxylite by gas type. Math: 50 times 600 divided by 1000. | 30 kilograms | Puft Prince lazy morph diet | ONI-DB Puft Prince page: diet polluted oxygen 50 g/s, equals 30 kg/cycle |
| Slickster Excretes crude oil at half intake. Math: 33.33 times 600 divided by 1000. | 20 kilograms | Slickster carbon dioxide diet | ONI-DB Slickster page: diet carbon dioxide 33.33 g/s, equals 20 kg/cycle |
| Molten Slickster Same 20 kg intake as Slickster. Excretes petroleum instead of crude oil. | 20 kilograms | Molten Slickster hot climate morph | ONI-DB Molten Slickster page: diet carbon dioxide 33.33 g/s, equals 20 kg/cycle |
| Pacu Needs a fish feeder to tame. Converts algae to polluted dirt. | 7.5 kilograms | Pacu algae diet, tame and fed | ONI Wiki Pacu page: diet 7.5 kg/cycle algae to 5 kg polluted dirt |
| Tropical Pacu Same 7.5 kg intake as Pacu. Temperature range differs, diet does not. | 7.5 kilograms | Tropical Pacu warm water morph | ONI Wiki Pacu page: Tropical Pacu shares 7.5 kg/cycle algae diet |
About this converter
Every tame critter in Oxygen Not Included eats a fixed amount per cycle at 100 percent metabolism. Klei prints the rate in the diet tooltip. Hatches sit at the top at 140 kg of rock per cycle. Smooth Hatches take 100 kg of metal ore. Pokeshells take 70 kg of polluted dirt. Pufts breathe 50 kg of polluted oxygen. Slicksters take 20 kg of carbon dioxide. Pacus take 7.5 kg of algae. This table puts 12 Klei diet rates on one kilogram scale so ranches can be sized by feed.
How to use it
Pick two critters and a unit in the top row, for example Hatch and Pacu with kilograms. The three boxes below stay linked, so editing any number updates the other two. One box holds feed for the first critter, one holds feed for the second, one holds the total in the chosen unit. Try 1 Hatch against Pacus to see how many algae eaters one rock eater equals.
Wild critters eat at 25 percent and glum tame critters drop to 20 percent, so this table uses satisfied tame rates only. Babies multiply intake by 0.1. Gram per second figures from ONI-DB use a 600 second cycle, so 33.33 g/s equals 20 kg per cycle. Dreckos are left out because Klei lists their feed as plant growth percent per cycle, not kilograms. Shove Voles, Pips and Gassy Moos are left out because their solid diets vary by source and life stage.
FAQ
Which critter eats the most per cycle?
The common Hatch, Stone Hatch and Sage Hatch each take 140 kg per cycle at 100 percent metabolism. The Smooth Hatch takes 100 kg of metal ore. Hatches are the hungriest ranch critters by mass.
Why do several rows share the same value?
Morphs share intake and differ in output. Stone and Sage Hatches match the Hatch at 140 kg but make coal from different rocks and organics. Molten Slicksters match Slicksters at 20 kg but make petroleum. Tropical Pacus match Pacus at 7.5 kg.
How are gram per second figures turned into kg per cycle?
Multiply grams per second by 600 seconds per cycle, then divide by 1000. A Slickster at 33.33 g/s gives 33.33 times 600 divided by 1000, which equals 20 kg per cycle. The same math gives Puft 50 kg and Oakshell 70 kg.
Do wild or glum critters eat less?
Yes. Wild satisfied critters run at 25 percent, so a wild Hatch eats 140 kg every four cycles. Glum tame critters drop to 20 percent. Babies multiply intake by 0.1. Ranch math in the table uses satisfied tame adults.
Sources
- ONI Wiki, Metabolism page (Hatch eats 140 kg per cycle at 100%; wild 25%; glum tame 20%; baby x0.1)
- ONI Wiki, Hatch page (Hatch 140 kg rock to 70 kg coal; Stone Hatch 140 kg hard rock; Sage Hatch 140 kg organics; Smooth Hatch 100 kg ore to 75 kg refined metal)
- ONI Wiki, Pokeshell page (70 kg/cycle polluted dirt to 35 kg sand; 70 kg/cycle rot pile)
- ONI Wiki, Pacu page (7.5 kg/cycle algae to 5 kg polluted dirt; U50 diet change)
- ONI-DB, Slickster page (carbon dioxide 33.33 g/s) and Molten Slickster page (33.33 g/s)
- ONI-DB, Puft page (polluted oxygen 83.33 g/s) and Puft Prince page (50 g/s)
- ONI-DB, Oakshell page (polluted dirt 116.67 g/s)
Last verified: 2026-10-15 · 12 entries
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