Valheim RAM Calculator
Adjust the sliders and dropdowns below to calculate the ideal RAM for your Valheim server based on server type, player count, world state, and mods.
You finally start a world, your friends join, and then you see the world lagging all of a sudden. After this, every server owner asks the same question: how much RAM does a Valheim server actually need? If you start asking on Reddit or Discord, you will get answers like: "4 GB is perfect" or "just get 16 GB". Both answers can be right, depending on what world you want to create and what you run on it.
On a 4 GB server with a few friends and a fresh world, it can run pretty smoothly. The safe spot for a long-running world with a ten-group of friends is between 6 and 8 GB. Heavier mods can push that to 10 to 12 GB or maybe even more.
If you aren't a person who likes reading, you can use Cybrancee's free RAM calculator, which is above this text; just tell it the player count, whether you use mods or not, and the world state, and it estimates the memory and what plan you should get. More details are below in the rest of the blog.
This guide covers what Valheim servers need in 2026, what changed with the 1.0 update, and how to land on a number without guessing.
The short answer
Valheim's servers have an interesting design and a common one: the whole saved world sits in memory, and that tells a lot about the ranking. Mostly guides agree on these three tiers: 4 GB for a fresh vanilla world with a few players, 6 to 8 GB for about ten players with a big base, 8 GB for some light mods, and 10 to 12 GB or even more for heavily modded worlds.
Most people assume that player count matters the most, but that isn't the case, and it's commonly mistaken. A server's memory follows the world: how many zones you've explored, how much you've built, and how long it has been running. Having ten people in a new vanilla world costs less than two players on a base that's been growing for a year.
In normal use, you can start at 4 GB for a new world, or 6 GB if your friend group gets bigger. Watch the server usage in your host panel and upgrade when you see it sit near the top for almost everything.
History of Valheim server memory usage
On February 2, 2021, Iron Gate launched the Early Access version of Valheim; since then, they haven't published any guide stating the official RAM spec for a dedicated server. The only official specs are the game client ones: 8 GB minimum and 16 GB recommended on Steam. A server doesn't render how a game client renders, so those recommendations don't apply here.
The community came up with some specs after many tests. Unofficial sources such as the Valheim wiki page say that a server requires a minimum of 2 GB of RAM and a four-core CPU, and recommends 4GB of RAM or more. It also mentions this rule: a fresh world sits around 1.8 to 2.4 GB, and every area where players are active adds about 100 to 300 MB, with busy areas or bases costing more. However, with the new 1.0 version, the stats are lower. On a fresh world, idle sits around 1.3 or 1.25 GB.
In the new 1.0 version, mods took a big hit. Many mods broke at the launch, and it required authors to update their mods as fast as they can. The hype was big, and it still is, so if you are a developer, fixing your mod fast earns you a lot of downloads.
Server performance and resource usage
Valheim's dedicated server works differently from most survival game servers, and that changes how you think about hardware. According to the Valheim wiki, the server relays traffic between players, generates terrain when someone explores a new area, holds the loaded world in memory, and saves it. It doesn't simulate the game itself. Each player's own PC handles creatures and physics in the area they're standing in.
CPU: Once the world is generated, the server isn't CPU-heavy. The demanding moments are exploration, when new terrain gets generated on the fly, and the periodic world save. Most of that runs on one main thread, so clock speed beats core count, and around 3 GHz or more is a sensible target. Lag often traces back to a player instead. One player's PC gets assigned to run each area, and if that machine is weak or busy, everyone sees delayed chests, doors, and falling trees. Having a stronger PC enter an area first, or asking the current host to leave and re-enter, fixes it.
RAM: Memory holds every placed piece, every item on the ground, every terrain change, and every zone anyone has visited. Three things drive it up. Building is the biggest, because a base with thousands of pieces costs more than a lot of exploring. Exploration comes next, since each visited zone stays in the save. Time is the third, as dropped items and long-lived structures accumulate. Each save also copies the world in memory before writing it to disk, so leave spare room above your idle number.
Disk: A world save is small, usually tens of megabytes even for old worlds, but the server keeps rolling backups and its own files run a little over 2 GB. Saves are frequent, so an SSD or NVMe drive keeps them short. 10 to 20 GB of storage is plenty for most servers.
Network: Valheim uses UDP, and the default ports are 2456 and 2457 (2458 for crossplay). Bandwidth needs are modest. Hosts quote roughly 0.5 Mbps of upload per player, so ten players stay around 5 Mbps. Latency and routing matter more than speed, which makes server location worth a look if your friends are scattered.
RAM recommendations
Treat these as starting points. Hosts disagree a little: some say 4 GB is fine for a vanilla server with ten players, others start at 6 GB for any active group. The table below sits in the middle.
| Scenario | Players | Mods | Recommended RAM | Notes |
|---|---|---|---|---|
| New world, one to three friends | 1 to 3 | None | 4 GB | The idle floor is around 1.3 GB, which leaves plenty of room. |
| Small vanilla group | 2 to 5 | None | 4 to 6 GB | 4 GB is comfortable at first. Moving to 6 GB gives the world room to grow. |
| Full crew, big base | 6 to 10 | None | 6 to 8 GB | The tier most hosts suggest for an active group on a world played for months. |
| Crossplay enabled | Up to 10 | None | Add 1 to 2 GB | Crossplay routes through PlayFab, which adds overhead. Crossplay servers stay at 10 players. |
| Light modded | 2 to 10 | QoL and UI mods | 8 GB | Steam-only. A dozen QoL mods rarely add more than a few hundred MB. |
| Heavy modded | 2 to 10 | Content mods, new creatures, world changes | 10 to 12 GB | Content mods that add spawns and item pools are the heaviest. |
| Large modpack, big world | 10 | Many heavy mods | 12 to 16 GB | Big mod lists on a fully explored world. |
One detail deserves a closer look: crossplay. When it's on, Valheim switches from Steam networking to PlayFab, which lets Xbox, PlayStation 5, Switch 2, and Steam players share one server. One host measured the extra cost at 1 to 2 GB. Crossplay and BepInEx mods can't run at the same time, so a group that wants mods has to stay Steam-only.
Skip the math with a RAM calculator
If you have trouble with the tables and rules, Cybrancee offers a free RAM Calculator alongside our hosting services. You just tell it if you have a simple vanilla world or if you use mods, how many mods you have, if they are heavy or not, and it gives you an estimate of how much RAM you need for your server alongside a recommended plan. Remember, this is only an estimate since world age, base size, and any heavy individual mod can shift the whole number, but this works well instead of guessing. Try it right here at the top of the page.
Cybrancee also offers Valheim server hosting, so if you'd rather skip SteamCMD and keep your world online around the clock, you can start with the amount of RAM the calculator suggests. Valheim plans start at $7.99 a month for 4 GB (Forseti). Thor gives you 8 GB, Odin gives you 12 GB, and the Scalable plan goes up to 32 GB. Every plan has unlimited slots and storage and supports mods, and servers run on Ryzen CPUs clocked over 4 GHz with NVMe storage. If your mod list or your world outgrows a plan, you can move up and keep your world.
Common mistakes and pitfalls
Sizing by player count: Multiplying a number by your headcount sounds tidy, but memory follows the world. Four builders with huge bases can weigh more than eight explorers who keep moving. Size for what you have built and explored.
Blaming RAM for CPU or network lag: If stutter gets worse as players spread across the map while memory sits well below the limit, the cause is usually single-core speed or an overloaded player PC acting as the area host. More RAM won't fix that. A faster core, or a better-connected player, will.
Running too close to the limit: A server that sits near its ceiling has no room for a busy session, a big save, or a mod update. Rubber-banding, long load times when joining, and stutters at every save are the usual warning signs. Upgrade before the crashes start.
Mixing crossplay and mods: The two can't run together. If anyone in your group plays on Xbox, PlayStation, or Switch, crossplay has to stay on and BepInEx mods aren't possible. If everyone is on Steam and you want mods, turn crossplay off. Decide before you buy, since it affects which plan makes sense.
Throwing RAM at a leaking mod: One badly behaved mod can eat memory no matter how big your plan is. If usage climbs steadily, disable your most recent added mods one at a time. More RAM only delays a leak.
Buying more than you need: Valheim is one of the cheaper games to host. Paying for 12 GB to run a new vanilla world for three friends wastes money. Start at 4 GB and scale up when your numbers say so.
Summary
Valheim's server loads the whole world into memory, and the world is what costs you RAM, more than the players do. Plan on 4 GB for a new vanilla world, 6 to 8 GB for a full crew with a big base, 8 GB for light mods, and 10 to 12 GB or more for heavy modpacks. Add 1 to 2 GB if crossplay is on, and remember that crossplay and BepInEx mods can't share a server. Pick your number from the world, and the mod list first and the player count second, then watch your usage and adjust. The 1.0 update didn't raise the memory floor, but it did change what you should check before updating mods.
Before you launch, run through this list:
- Choose RAM based on your world and mod list, not the biggest plan on the page.
- Start at 4 GB for a new vanilla world and upgrade when usage stays near the limit.
- Add 1 to 2 GB if you turn on crossplay, and skip BepInEx mods while it's on.
- Pick a fast single-core CPU, ideally 3 GHz or higher, and an SSD or NVMe drive.
- Keep the server and every player on the same game version.
- Confirm every mod supports 1.0 before you update, and add them back one at a time.
- Recheck your numbers as your world grows and after each major update.
Happy sailing!
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