Blockspan
by Luigi53
Builders who need exact sizes for a build area can use Blockspan, which measures the space between two marked block positions.
What it does
Blockspan is a client-side mod for Fabric and Forge that helps builders measure and color-code build areas directly in the world. The player selects two block positions, and an in-world box with labels shows the length, width, height and volume of the selected area, along with its distance and center point coordinates. Measurements are inclusive, following Minecraft's own convention, so both endpoint blocks are counted on each axis.
The workflow starts by looking at a block and pressing R to set Point A, then looking at another block and pressing R again to set Point B. Ctrl + R force-sets a point at the targeted position, and Shift + R sets the next point. Areas can be saved, renamed, given a color, hidden or shown, and deleted from the Blockspan menu, which opens with V. Saved areas are stored only in the local client configuration, so they never reach a server.
Blockspan is released under the MIT License and is not open source. It runs on the client alone, so servers and other players do not need it. Fabric API is required, and the mod is published for 26.1.2 only, with latest files for Fabric and Forge dated 2026-05-23.
Key features
In-world area box
The selected area appears in the world as a subtle box with its length, width, height and volume shown as labels.
Inclusive measurements
Measurements follow Minecraft's style, so both endpoint blocks of Point A and Point B are counted.
Saved and colored areas
Areas can be renamed, given a color, hidden, shown or deleted from the Blockspan menu.
Keyboard point controls
R sets points on the targeted block, Ctrl + R force-sets a point, and Shift + R sets the next point, with a key to clear active points.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
How it compares
Visible Sound is a Fabric client-side mod released under the GNU General Public License v3.0 only, published for 1.16.5 – 26.2, and it is open source. Storage Container Labels is open source under the MIT License, works on Fabric for 26.1 – 26.2, and is optional on either side. Labelling Containers uses a custom license and is not open source, with files for Fabric, Forge and NeoForge across 1.18.2 – 1.21.8.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Blockspan | Fabric and Forge | 26.1.2 | Client-side only | 2026-05-23 |
| Visible Sound | Fabric | 1.16.5 – 26.2 | Client-side only | 2026-08-04 |
| Storage Container Labels | Fabric | 26.1 – 26.2 | Client or server, optional | 2026-07-07 |
| Labelling Containers | Fabric, Forge and NeoForge | 1.18.2 – 1.21.8 | Client and server | 2026-07-26 |
Questions
Does Blockspan need Fabric API?
Does a server need Blockspan installed?
Which versions does Blockspan support?
Are saved areas shared with other players?
In the catalog
Blockspan is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 15,189 mods support Minecraft 26.1.2.
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What the author says
Blockspan is a client-side Fabric/Forge mod for builders who want quick measurements while planning builds. Select two block positions and Blockspan shows a subtle in-world box with labels, dimensions, volume, distance, center point, and coordinates. It is safe for survival worlds/multiplayer because it does not add…
Official listing
- Modrinth page
- modrinth.com/mod/blockspan
- Owner
- Luigi53
- Published
- 2026-05-20
- Updated on Modrinth
- 2026-05-23
- Facts verified
- 2026-10-15