Block
In Space Engineers, any piece built as part of a ship or station is known as a Block. Blocks can vary from basic structural entities (such as the Light Armor Block) to standalone, functional facilities (such as the Refinery) to pieces that only offer a functionality useful to a complete whole (such as the Cockpit). Blocks are constructed by welding Components together: see Building for details on how to do so.
Large and Small Blocks
Blocks in Space Engineers can either be constructed Small, and so intended to be used on Small Ships, or Large and so intended to be used on Large Ships and Stations. Most (but not all) blocks can be built in either size, and so have two completely different sets of weights, volumes, and build recipes depending on which size is ultimately created. It is thus important to know what context you are looking to use a particular block in, or you might find your required Components to be off by a factor of 100!
Certain Blocks, such as the Medium Cargo Container, cannot be built on Large Ships or Stations. Others, such as the Refinery, cannot be built on Small Ships.
Blocks as Measurement
When speaking of "blocks", one can either be referring to the items listed on this page, or one might instead be referring to units of distance. A single Large Block is 2.5 meters cubed, while a single Small Block is 0.5m3 (the Engineer avatar is about 1.8 meters tall, for reference).[1] This means that measurement changes based on context; a ship being 10 blocks long might be puny if a small ship (at 5 meters long, it's a large bathtub) but if referring to a large ship, 10 blocks is 25 meters long and is much more metal to worry about.
List of Blocks
This is a complete, generated list of all Blocks in the current build of Space Engineers:
| Name | Icon | Large Ship / Station | Small Ship | Description |
|---|---|---|---|---|
| Block | 64px | ✔ | ✘ | |
| Conveyor | 
|
✔ | ✔ | A multi-directional conveyor block that can transfer items between other blocks from all sides |
| Hydrogen Tank | 
|
✔ | ✔ | |
| O2 | 64px | ✔ | ✔ | A functional structure for processing Ice into breathable Oxygen and Hydrogen. |
| Small Hydrogen Tank | 
|
✔ | ✔ | A smaller Hydrogen Tank block used to store and distribute Hydrogen. |
| Vending Machine | 
|
✔ | ✘ | |
| Window 1x1 Side Inv | 
|
✔ | ✘ | 1x1 Inverted corner side |
| Window 1x2 Side Left Inv | 
|
✔ | ✘ | Inverted Angled 1x2 window. |
| Window 1x2 Side Right Inv | 
|
✔ | ✘ | Inverted Angled 1x2 window.
|
