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Factorio BlueprintsAll belt balancersFactorio 4 to 9 Balancer Blueprint

Factorio 4 to 9 Balancer Blueprint

Four belts spread over nine outputs in 9 x 12 tiles with 16 splitters. Balanced, not throughput unlimited; a yellow version is listed.

In-game render of the 4 to 9 balancer blueprint

In-game render of the 4 to 9 balancer blueprint

4 to 9 balancer for red, blue and turbo belts

49
Input belts
4
Output belts
9
Balancer type
belt
Size (tiles, width x length)
9 x 12
Listed belt tiers
redbluegreen (turbo)
Throughput unlimited
No
Input balanced
Yes
Output balanced
Yes
Entities in the blueprint
Express transport belts
48
Express splitters
16
Express underground belts
10
String exported by Factorio
2.0.69.0
Designer
raynquist

String exported by Factorio 2.0.69. Decoded and checked by this site; not test-imported in the game.

Is the 4 to 9 balancer throughput unlimited?

No. It is balanced: it draws evenly from every input and gives every output an equal share. It is not throughput unlimited, so when only some inputs are fed or some outputs are blocked, an internal bottleneck can keep the total below what the remaining belts could carry. That is fine where all belts run full; where they often do not, check the other layouts and nearby configurations for one marked throughput unlimited.

Belt tier note

Built with express (blue) belts, splitters and undergrounds. The collection lists this layout as working with red, blue and turbo undergrounds. For yellow belts it keeps a separate version, which appears with its own string under the other layouts below.

Compatible underground tiers listed by the source: red, blue, green (turbo). A yellow-belt alternate exists in the downgrades folder.

Source
Book
Raynquist's Belt Balancers Fall 2025
Book folder
4 to x
Name in the book
4-9 balancer
The book covers
1-1 to 9-9, plus some 10-x, 12-x, 16-16, 32-32, 64-64 and 128-128 configurations; lane balancers for 1, 2, 3, 4, 6 and 8 belts; yellow-belt alternates in a downgrades folder

Other 4 to 9 balancer layouts

The yellow version is one row longer at 9 x 13 and built from basic parts; like the main layout it is not throughput unlimited.

4-9 yellow balancer

4-9 yellow balancer

Size (tiles, width x length)
9 x 13
Throughput unlimited
No

4 to 9 balancer blueprint string

The string was exported from Factorio 2.0.69. Copy it, open the game and press Import string on the shortcut bar, then paste. This site decoded the string and checked the entities and size against the preview, but did not import it in the game.

Is there a 4 to 10 balancer?

No. For four input belts the collection has 4 to 1 through 4 to 9 and 4 to 12, but no 4 to 10. This 4 to 9 is the closest; the 4 to 12 is throughput unlimited, so it still works if you leave two of its outputs unused.

Nearby balancer configurations

All belt balancers