There’s nothing worse than sprinting across a toxic alien planet chasing a rare S-class ship, only to see your life support bar flash red with 10 seconds of oxygen left. I’ve been there more times than I can count, and that panic is why I’ve tested every possible method to keep your supply topped up no matter where you are. If you’re tired of scrounging for random oxygen plants every two minutes, this guide breaks down exactly how to make oxygen in No Man’s Sky for every play style, whether you’re just starting out or you’re running a sprawling interstellar base.
Quick, Emergency Methods to Make Oxygen Without a Base
If you’re still early in the game and don’t have a permanent base set up, you don’t have to be at the mercy of random oxygen plant spawns. Always carry at least one portable refiner in your exosuit inventory at all times — they only cost 30 ferrite dust to craft, and you can pick up the blueprint within your first hour of play. The most basic oxygen recipe only requires two common resources that you can collect almost anywhere in the galaxy: 1 unit of carbon and 1 unit of di-hydrogen, which refine into 1 unit of oxygen in 2 seconds flat.
There are three go-to emergency methods I keep in my back pocket for when I’m far from base and running low on air:
- Portable refiner conversion using common resources you can collect in 60 seconds or less
- Emergency life support boost from your exosuit’s built-in oxygen reserve (only use this if you have 0 other options, as it drains 50% of your exosuit’s core power)
- Portable oxygen harvester deployment for temporary, hands-off supply while you explore a local area
You don’t need any rare tech to pull off these methods, which is why I recommend all new players prioritize unlocking the portable refiner blueprint before anything else. I always keep a dedicated stack of 100 carbon in my exosuit just for oxygen emergencies, so I never have to stop mid-mission to farm more resources when my life support runs low.
Base-Based Oxygen Production for Permanent, Unlimited Supply
Once you’ve set down your first base computer, learning how to make oxygen in No Man’s Sky at scale becomes one of the highest priority upgrades you can make. The easiest way to get unlimited oxygen without constant crafting is to place oxygen harvesters around your base. These machines pull oxygen directly from the planet’s atmosphere, no manual input required once you set them up.
A single fully upgraded oxygen harvester produces 250 units of oxygen every 10 minutes, and you can place up to 6 harvesters per base for a total of 1500 units every 10 minutes. That’s more than enough oxygen to keep you supplied, fill your exosuit reserves, and even sell excess units for extra units if you’re short on cash. You’ll want to hook them up to solar panels and batteries if you’re building on a planet with a day/night cycle, or use biofuel reactors if you’re on a perpetually dark frozen or dead planet.
One small downside to note: oxygen harvesters run 30% slower on extreme weather or high radiation planets unless you install storm shield upgrades on your base. I learned this the hard way when I set up 4 harvesters on a irradiated planet and came back 2 hours later to only 200 units of oxygen instead of the 2000 I expected.
Advanced Crafting Methods to Turn Excess Resources Into Oxygen
Once you unlock large refiners and have access to mid-game resources, you can make oxygen far more efficiently than the basic portable refiner recipe. This trick alone makes learning how to make oxygen in No Man’s Sky far less tedious for late game players who don’t want to stop to farm resources. The best high-yield recipe uses 2 units of condensed carbon and 1 unit of nitrogen to make 5 units of oxygen, which is 5x the output of the basic recipe for only a small increase in resource cost.
2 units of condensed carbon + 1 unit of nitrogen = 5 units of oxygen is my go-to recipe when I’m on my freighter and need to restock quickly. Condensed carbon is easy to make by refining regular carbon, and nitrogen can be collected from any lush or temperate planet’s atmosphere with a gas harvester. If you do a lot of underwater exploration, you can also refine excess kelp sacs into 10 units of oxygen each, which is a great way to use up a resource that otherwise has very few practical uses.
I usually run 4 large refiners on my freighter dedicated solely to oxygen production, so I never have to worry about restocking before a long exploration run. They run even while I’m warping between systems, so I always have a full stack of 9999 oxygen waiting for me when I land on a new planet.
Common Mistakes to Avoid When Making Oxygen in No Man’s Sky
Most of these mistakes happen when players first learn how to make oxygen in No Man’s Sky and don’t test out their setups before heading out on long trips. The first and most dangerous mistake is using your last bit of carbon to make oxygen. Never use your last unit of carbon to make oxygen if you don’t have a way to collect more, because carbon is also used to power your mining tool, life support, and portable refiners. If you use your last carbon to make oxygen, you’ll be stuck unable to mine any more resources to recharge your tools.
Another common mistake is placing oxygen harvesters too close to each other. Each harvester has a 10u radius where it pulls oxygen from the atmosphere, and if two harvesters’ radii overlap, both will run at 50% efficiency. You can check the radius when you place the harvester by looking at the blue highlighted area around the machine. I always place mine at least 15u apart to make sure they run at full speed.
The last mistake I see all the time is forgetting to empty your harvesters before leaving a planet for a long time. Each harvester only has 500 units of storage, so once it’s full, it will stop producing oxygen until you empty it. I set a reminder on my phone to check my harvesters every hour if I’m exploring a local area, so I never waste production time.
At the end of the day, oxygen doesn’t have to be a constant source of stress when you’re exploring the galaxy. Whether you’re stuck on a frozen planet with nothing but a mining tool and a pocket full of carbon, or you’re running a network of bases across 10 star systems, there’s a method that fits your current progression level. Once you get the hang of how to make oxygen in No Man’s Sky, you’ll be able to focus on the fun parts of the game: hunting for rare creatures, uncovering ancient lore, and building the base of your dreams without constantly checking your life support bar. Next time you head out on an exploration run, test out one of the methods above and see how much smoother your trip goes.
