What is Ferrumium?

Ferrumium is a web app for planning, calculating, and sharing Satisfactory factories. You design layouts visually in the Planner, check production rates against real game data, and share your work with other players.

Do I need a Ferrumium account?

You can browse Discover and view published factories without an account. Creating or saving factories, uploading saves and blueprints, co-op sessions, and publishing all require a free account.

What is the difference between the Planner and Drafts?

The Planner is bottom-up. You place machines, connect them with belts and pipes, and verify production rates yourself. Drafts is top-down. You set a production target and the solver generates the full recipe chain for you.

Use Drafts when you know what you want to produce but not how to lay it out. Use the Planner when you want full control over every machine and connection.

What is the difference between sharing and publishing?

Sharing gives someone a direct link to view your factory. Only people with the link can access it.

Publishing puts your factory on Discover where anyone can search for and find it. Publishing is versioned, so you can push updates without losing previous versions.

What happens when I import someone's factory?

You get an independent copy in your library. Changes the original author makes do not affect your imported copy. You can modify it freely without affecting the original.

Can I make a factory private again after publishing?

Yes. Unpublishing removes the factory from Discover and search results. People who already imported it keep their copies, but no new users can find it through search.

Can multiple people edit a factory at the same time?

Yes. The factory owner creates an invite link and shares it with others. Editors can modify the factory in real time. Viewers can watch but not edit. Up to 8 people can join a single co-op session.

Can I undo during co-op?

No. Undo and redo are disabled during live co-op sessions. Tracking separate edit histories for multiple participants would cause conflicts, so the feature is turned off while a session is active.

What is the difference between a factory, a blueprint, and a save?

A factory is a Ferrumium planning layout you create in the Planner. It lives inside Ferrumium and tracks machines, connections, and production rates.

A blueprint is a Satisfactory .sbp file. It represents a pre-built structure you can stamp down in-game. A save is a Satisfactory .sav file containing your full game state.

You can upload both blueprints and saves to Ferrumium for sharing and analysis.

What do connection warnings mean?

Belt Bottleneck means the belt tier on a connection is too low for the output rate of the source machine. Upgrade the belt to a higher tier.

Input Starvation means the downstream machine needs more items per minute than the connection delivers. Check that upstream production is sufficient and the belt tier is high enough.

Oversupply Warning means the upstream machine can produce more than the downstream machine consumes. This usually points to a balancing problem farther down the line rather than an issue at the flagged connection itself.

Where are my settings saved?

Planner preferences like belt tier, grid snap, and autosave interval are stored in your browser's local storage. If you are logged in, these preferences — along with theme, icon style, and notification settings — are also synced to your account and persist across devices.

How do I reset my planner settings without losing my factories?

Go to Settings > Factory Planner > Data and click Reset Preferences (Soft Reset). This resets planner-specific preferences (grid snap, default belt tier, autosave) back to defaults but keeps all your saved factories intact.

Will Ferrumium ever have ads or paid features?

No. Ferrumium is a passion project, and that is not changing. There will never be ads, paywalls, locked features, or premium tiers that gate functionality. The platform will always be free and fully open to everyone.

If you want to support development, you can do so through Patreon. Patron tiers only grant cosmetic perks like profile badges and extra super-like weight — they never unlock features that free users cannot access.

How do I change the recipe multiplier or power multiplier?

Recipe Parts Cost and Power Consumption multipliers are per-factory settings. You configure them when creating a new factory or draft.

In the Create Factory dialog, expand the Game Settings section. You will see two sliders:

• Recipe Parts Cost — scales all recipe input amounts. Available values range from 0.25× to 2× (default is 1×).
• Power Consumption — scales machine power draw. Available values range from 0.25× to 5× (default is 1×).

Adjusting either slider away from 1× automatically switches the factory mode to custom. These multipliers apply to every machine in that factory and are useful for modded games or challenge runs with non-standard rates.