Simple Weight
by Frenk02
Simple Weight is a NeoForge mod that gives each item a weight and slows a player down as the carried load grows.
What it does
Every item in the inventory has a weight value, and the total is recalculated in real time as items are picked up or dropped. When the total gets heavy, movement speed drops in proportion to the load, and the reduction is applied through Minecraft's attribute system so other speed modifiers keep working. A player who is overencumbered cannot swim upward in water.
Weight values are set by datapacks. The mod ships default values for common items, and a server or modpack can write its own weight configuration by placing JSON files in a datapack. A server running it needs every connecting player to have it too. Files are published for NeoForge only, for Minecraft 1.21.1, and the license is the GNU General Public License v3.0 only, which makes the project open source.
The mod was extracted from the Tharidia Things mod, the main component of the Tharidia roleplay server project, and can be deployed and maintained separately from the other Tharidia mods. The project is in alpha and under active development, so behavior may change between builds and bugs should be expected.
Key features
Item weight values
Each item carries a weight that counts toward the player's total load, covering common items out of the box.
Real-time load tracking
The total weight updates as items are picked up or dropped, so the effect follows the inventory at once.
Proportional speed reduction
Movement slows gradually as the total weight rises, with the penalty scaled to how heavy the load is.
Overencumbrance in water
A player who is overencumbered cannot swim upward, which adds a limit beyond ground speed.
Datapack weight configuration
Weight values can be replaced or extended with JSON files in a datapack, without editing the mod.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Roleplay servers
Servers that want realistic inventory limits can use the weight system to shape how players carry loot and supplies.
Modpacks with custom balance
A modpack author can write a weight table for its own items through datapacks and keep the default values for the rest.
Who it’s for: Server owners running roleplay or survival servers and modpack authors who want carrying loads to affect movement.
Questions
Does Simple Weight need to be installed on both sides?
Which loader and version does Simple Weight support?
How are the weight values changed?
More from Frenk02
What the author says
This mod is currently in an alpha state and is being actively developed. Features may change, and bugs may be present. Use at your own risk in production environments. Tharidia is an ambitious Minecraft roleplay server project set in a medieval fantasy world. The server features complex, custom mechanics that…
Official listing
- Modrinth page
- modrinth.com/mod/simple-weight
- Owner
- Frenk02
- Published
- 2026-01-04
- Updated on Modrinth
- 2026-01-04
- Facts verified
- 2026-10-15