If you’ve ever landed on a toxic or frozen planet only to see your life support bar blinking red 30 seconds after stepping off your ship, you know how brutal No Man’s Sky can be for players who forget to stock up on critical supplies. Most new players learn pretty quickly that oxygen is the backbone of every exploration run, and running out mid-trek usually means respawning back at your ship with half your inventory gone. Knowing how to make oxygen in no man's sky is the single most essential survival skill you can master, no matter how many hours you’ve put into the game. We’re breaking down 4 practical methods for every stage of play, plus hidden hacks to cut down your oxygen use so you can spend more time exploring and less time panicking about your life support.
How to Make Oxygen in No Man's Sky: Early-Game Emergency Method
When you’re first starting out, you don’t have access to fancy refiners or base building tech, so you need a method that works with the minimal gear you have on hand. The fastest way to make oxygen in a pinch is crafting oxygen capsules directly in your exosuit inventory, using only condensed carbon. You’ll need 20 condensed carbon per capsule, which you can get by punching any tree, bush, or toxic plant you find on nearly every planet in the galaxy. Never leave your ship without at least 5 spare oxygen capsules stashed in your quick slot, they’ll save you from dozens of avoidable deaths.
This method is only for emergencies, though. Condensed carbon is used for almost everything early game, from fueling your launch thrusters to crafting building parts, so burning through your entire stack for oxygen will leave you stranded in other ways. If you have time to hunt for the glowing green oxygen flora scattered across most planets, do that first to save your carbon for more important uses. But if you’re caught in a storm with 10% life support left, this is the fastest way to top up.
Mid-Game Reliable Oxygen Farming for Extended Exploration
Once you unlock the portable refiner a few hours into the game, you’ll never have to scramble for oxygen again as long as you have common resources on hand. The portable refiner lets you turn easy-to-find materials into oxygen in bulk, so you can stock up before a long trek or top up mid-exploration without hunting for flora. Always keep your portable refiner fueled with carbon and stored in your quick slot, so it’s ready to use the second you need it.
There are 3 go-to refiner recipes that work for almost every playstyle and biome:
- 2 Carbon + 1 Di-hydrogen = 3 Oxygen: Perfect for when you're exploring frozen or barren planets with tons of di-hydrogen crystals scattered across the surface, no extra hunting required
- 1 Kelp Sac = 5 Oxygen: Ideal if you're exploring ocean biomes, where kelp sacs are far easier to find than surface oxygen flora that only grows on land
- 1 Cobalt + 1 Ferrite Dust = 2 Oxygen: Works great if you're doing a lot of cave mining and have extra cobalt sitting in your inventory that you don’t need for crafting ion batteries
The only downside to this method is that it takes a few seconds to process each batch, so it’s not ideal for last-second emergencies when your life support is seconds from running out. But for planned exploration runs, it’s the most flexible option by far. I once used the di-hydrogen and carbon recipe to make 300 oxygen in 10 minutes on a barren planet with no flora at all, and it let me explore a full crash site and abandoned outpost without running back to my ship once.
Late-Game AFK Oxygen Farm for Unlimited Supplies
Once you’re 20+ hours into the game and have built a permanent base, you can set up an AFK oxygen farm that gives you thousands of units of oxygen without any extra work on your part. This method uses atmosphere harvesters, which pull resources directly from a planet’s atmosphere automatically as long as they’re powered. First, find a planet with a breathable atmosphere (you’ll see a small oxygen icon next to the planet name when you scan it from space) to maximize your output. Place your harvesters at least 10 units apart to avoid power glitches and connection issues that can stop them from working properly.
You can also add indoor planters to your base and grow oxygen flora directly, if you don’t want to rely on atmosphere harvesters. Each fully grown oxygen plant gives you 50 oxygen per harvest, and they regrow every 15 minutes with no maintenance required. I have 8 atmosphere harvesters and 20 oxygen plants on my home planet, and every time I stop by to pick up supplies, I leave with 3,000+ oxygen to take on my trips. I haven’t had to craft oxygen mid-exploration in over 40 hours of playtime.
The only downside to this method is the upfront cost: each atmosphere harvester costs 100 metal plating, 200 ferrite dust, and 5 carbon nanotubes to build, so you’ll need to gather a fair amount of resources before you can set up a large farm. But it’s a one-time investment that pays off for the rest of your playthrough, and you can even sell extra oxygen for a small but steady profit if you end up with more than you need.
Hidden Tips to Cut Down Your Oxygen Use Altogether
Making oxygen is great, but reducing how much you use in the first place will make survival far less of a hassle, no matter what stage of the game you’re in. The biggest upgrade you can make is installing S-class life support modules in your exosuit tech slots. A full set of S-class life support upgrades reduces your oxygen consumption by 75% or more, which means a single stack of 999 oxygen can last you 3+ hours of continuous exploration, even on the most toxic planets in the galaxy.
You can also use exocraft for long treks across planet surfaces, since all exocraft have their own built-in life support systems that don’t use your personal oxygen supply. If you’re caught in a storm far from your ship, duck into any random outpost, abandoned building, or even a small player-placed shelter, all enclosed spaces disable your life support drain entirely while you’re inside. If you play multiplayer, you can also drop stacks of oxygen for teammates who run low, which is a lifesaver if someone wanders off and gets caught in a storm away from the group.
Don’t forget that your ship also has unlimited oxygen while you’re sitting inside it, so if you’re waiting for a storm to pass or refining a big batch of resources, sit in your cockpit to avoid wasting your personal supply. Small changes like these add up fast, and you’ll be surprised how little oxygen you actually need once you get in the habit of using these tricks.
Whether you’re a brand new player who just got stuck on their first toxic planet or a veteran explorer gearing up for a 10-hour trek across uncharted regions of the galaxy, knowing how to make oxygen in no man's sky is a skill that will keep you alive through every unexpected situation. Test out the different methods to see what fits your playstyle: stick to the emergency capsule craft when you’re first starting out, use the portable refiner for mid-game exploration runs, and set up an AFK farm once you have a permanent base to cut out all the extra work. At the end of the day, the best method is the one that lets you spend less time worrying about survival and more time exploring all the weird, wonderful planets the game has to offer.
