Oxygen Not Included Rocket Fuel Costs Compared (KG)
Compare 12 Oxygen Not Included rocket fuel loads, from 100 kg CO2 to 900 kg petroleum and hydrogen. Klei engine and tank capacities with tables and sources.
Visual comparison
All values
Click any row to load it as Entry A.
| Name | Value | Context | Source |
|---|---|---|---|
| Carbon Dioxide Engine 100 kg. Lowest here. No extra tanks. | 100 kilograms | Spaced Out early engine. CO2 only | ONI Wiki Carbon Dioxide Engine page: stores 100 kg Carbon Dioxide |
| Steam Engine Spaced Out 150 kg. 15 kg per hex for 10 range. | 150 kilograms | Spaced Out steam engine. Steam only | ONI Wiki Steam Engine Spaced Out page: Storage Capacity 150 kg Steam |
| Sugar Engine 450 kg sucrose. Plus matching oxidizer. | 450 kilograms | Spaced Out sucrose engine. Needs oxidizer | ONI Wiki Sugar Engine page: Storage Capacity 450 kg Sucrose |
| Small Petroleum Engine 450 kg. 45 kg per hex for 10 range. | 450 kilograms | Spaced Out small petroleum engine. Needs oxidizer | ONI Wiki Small Petroleum Engine page: Storage Capacity 450 kg Petroleum |
| Small Solid Oxidizer Tank 450 kg. Matches small petroleum engine. | 450 kilograms | Spaced Out oxidizer tank. Oxylite or fertilizer | ONI Wiki Small Solid Oxidizer Tank page: holds 450 kg solid Oxidizer |
| Liquid Oxidizer Tank 450 kg liquid oxygen. 1 to 4 fuel ratio. | 450 kilograms | Spaced Out liquid oxygen tank | ONI Fandom Rocketry table: Liquid Oxidizer Tank 450 kg capacity |
| Solid Fuel Thruster 800 kg total. Booster only, needs main engine. | 800 kilograms | Base game booster. Iron plus oxylite | ONI Fandom Solid Fuel Thruster page: Storage Capacity 800 kg, 400 kg Iron plus 400 kg Oxylite per launch |
| Petroleum Engine Spaced Out 900 kg with 1 tank. Plus oxidizer tank. | 900 kilograms | Spaced Out petroleum engine with 1 fuel tank | ONI Fandom Rocketry table: Petroleum Engine Fuel Capacity 900 kg, 90 kg per hex |
| Large Liquid Fuel Tank 900 kg. Adds range to petroleum and hydrogen rockets. | 900 kilograms | Spaced Out extra fuel tank. Petroleum or hydrogen | ONI Wiki Large Liquid Fuel Tank page: Storage Capacity 900 kg Fuel |
| Large Solid Oxidizer Tank 900 kg. Oxylite twice as effective as fertilizer. | 900 kilograms | Spaced Out large oxidizer tank | ONI Wiki Large Solid Oxidizer Tank page: holds 900 kg Solid Oxidizer |
| Steam Engine Base Game 900 kg. Base version holds far more than Spaced Out 150 kg. | 900 kilograms | Base game steam engine. Steam only | ONI Fandom Rocket page: Both Steam Engine and Liquid Fuel Tank can fit 900 kg of fuel |
| Hydrogen Engine with 1 Tank 900 kg per tank. Longest range engine here. | 900 kilograms | Spaced Out hydrogen engine with 1 large tank | ONI Wiki Hydrogen Engine Spaced Out page: needs Large Liquid Fuel Tanks; Large Tank holds 900 kg |
About this converter
Rockets in Oxygen Not Included run on fixed fuel loads set by Klei. The Carbon Dioxide Engine holds 100 kg. The Spaced Out Steam Engine holds 150 kg. Sugar and small petroleum engines hold 450 kg each. Solid thrusters hold 800 kg of iron and oxylite. Petroleum, hydrogen, and base steam systems hold 900 kg per tank. This page lists 12 engine and tank loads side by side in kilograms from Wiki pages. Use it to plan fuel production and oxidizer ratios before launch.
How to use it
Pick two entries and a unit in the top row. The three boxes below stay linked. Change any box and the other two update. One box holds counts of the first fuel load, one holds counts of the second, one holds total kilograms. Try Carbon Dioxide at 100 kg against Hydrogen with 1 Tank at 900 kg to feel the gap. Try Sugar at 450 kg against Small Petroleum at 450 kg for early game planning.
All loads are storage capacities, not per hex burn, though burn rates ride in notes. Sugar, petroleum, and hydrogen also need oxidizer at 1 to 1 with fertilizer, 1 to 2 with oxylite, and 1 to 4 with liquid oxygen. Radbolt engines use 4000 radbolts instead of kilograms and stay out of this kilogram table. Base Steam at 900 kg and Spaced Out Steam at 150 kg differ by version and both rows say so. Check tank count after each build since extra Large Liquid Fuel Tanks add 900 kg each.
FAQ
Which rocket needs the least fuel?
Carbon Dioxide Engine at 100 kg. Steam Spaced Out at 150 kg follows.
Which needs the most here?
900 kg systems: Petroleum, Hydrogen with 1 tank, Large tanks, and Base Steam.
Do petroleum rockets need oxidizer too?
Yes. Petroleum and hydrogen need oxidizer tanks in addition to fuel tanks.
Where do numbers come from?
ONI Wiki engine and tank pages plus the Fandom Rocketry capacity table.
Sources
- ONI Wiki Carbon Dioxide Engine page: stores 100 kg Carbon Dioxide
- ONI Wiki Steam Engine Spaced Out page: 150 kg Steam; Sugar Engine page: 450 kg Sucrose; Small Petroleum Engine page: 450 kg Petroleum
- ONI Wiki Small Solid Oxidizer Tank page: 450 kg; Large Solid Oxidizer Tank page: 900 kg; Large Liquid Fuel Tank page: 900 kg Fuel
- ONI Wiki Hydrogen Engine Spaced Out page: needs Large Liquid Fuel Tanks; Steam Engine Base data via Fandom Rocket page: 900 kg
- ONI Fandom Rocketry table: Petroleum Engine 900 kg, Liquid Oxidizer Tank 450 kg; Solid Fuel Thruster page: 800 kg storage, 400 kg Iron plus 400 kg Oxylite
Last verified: 2026-10-15 · 12 entries
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