MT Inventory Weight
MT Inventory Weight adds a configurable weight system to Minecraft. Your inventory is no longer just limited by slots — every item has weight, and carrying too much can slow you down, weaken combat, and apply the Overload effect.
The mod is made for survival, RPG, and modpack gameplay where choosing what to carry actually matters.
Features
-
Automatic item weights
Most vanilla and modded items receive calculated weights automatically. -
Datapack custom weights
Item weights and armor pocket values are now data-driven through datapacks. -
fzzy_config support
Configure server and client settings in-game. Server settings can update live. -
Mod Menu support
Optional easy access to config screens through Mod Menu. -
Armor pockets
Armor can increase max carry weight through pockets. -
Overload effect
Carrying too much weight applies penalties. Strength and Haste can reduce overload severity. -
HUD display
Choose between the classic sprite HUD or a simple bar HUD. -
Item tooltips
Tooltips show item weight, stack weight, armor pockets, and container contents weight. -
Backpack and shulker support
Supported containers count stored items with reduced effective weight. -
Trinkets compatibility
Equipped Trinkets items can count toward carried weight when Trinkets is installed. -
Multiplayer support
Works in singleplayer, LAN, and dedicated servers with synced server values. -
Add-on API
Developers can add compatibility through the publiccom.megatrex4.api.v1API.
HUD preview
Configuration
MT Inventory Weight uses fzzy_config.
You can configure:
- max carry weight
- item category weights
- pocket capacity
- overload penalty strength
- realistic mode
- HUD style and position
- tooltip visibility
Specific item weights are configured with datapacks:
data/<namespace>/inventory_weight/items/*.jsonPocket values are configured with datapacks:
data/<namespace>/inventory_weight/pockets/*.jsonCloth Config is no longer required.
Useful Links
Thank you for your support and interest in MT Inventory Weight!
How to Install MT Inventory Weight (Mod)
MT Inventory Weight by MEGATREX4 is verified for Fabric, Forge, Neoforge across Minecraft versions 1.20, 1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6, 1.21 (latest release: 2.0.2-1.21.11, file size: 2.3 MB). Follow the steps below to install it safely from ModCraft.tv:
- Click the Download button above and select your Minecraft version (1.20, 1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6, 1.21) and platform (Fabric, Forge, Neoforge).
- Make sure you have the compatible loader or environment installed for Fabric, Forge, Neoforge.
- Move the downloaded MT Inventory Weight file into your Minecraft
.minecraft/modsfolder and launch the game.
All Versions
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- Reworked internal weight calculation system.
- Added public add-on API:
com.megatrex4.api.v1. - Switched configuration to fzzy_config.
- Added live server config updates.
- Added Mod Menu-compatible config access.
- Removed legacy non-data-driven item weight system.** All item weight definitions are now strictly datapack-driven; players and developers **must migrate** to the new datapack system. More information and instructions can be found on our wiki: https://megatrex4.github.io/inventory-weight/guide/datapacks
- Added datapack-driven armor pocket definitions.
- Added NBT-specific item weight and pocket rules.
- Added server-to-client sync for weight datapack/config data.
- Reworked player weight sync through Cardinal Components.
- Added HUD styles: sprite and bar.
- Added configurable HUD text modes and positions.
- Added HUD text screen-edge clamping.
- Reworked item tooltips.
- Added container tooltips:
Weight insideand effectiveWeight. - Changed shulker/backpack weight formula to:
empty container weight + contents / 2. - Isolated Trinkets compatibility.
- Reworked overload penalty handling.
> **IMPORTANT**
> **Regarding Sinytra Connector & Forge Support:** > This mod is natively developed for Fabric. Due to ongoing technical issues and limitations with Sinytra Connector, we are no longer maintaining compatibility fixes for it.
>
> However, we are completely open to community collaboration! If anyone is interested in creating and maintaining a proper, dedicated Forge/NeoForge version, you are more than welcome to open a separate branch in our repository or submit a PR. We would be happy to host and publish your official ports directly on our Modrinth and CurseForge pages, crediting you as a co-author/maintainer.
>
> In the meantime, you can still try running the Fabric jar via Sinytra manually, but do so at your own risk.
> **WARNING**
> Multiplayer has not been fully tested yet. However, singleplayer (SSP) should work perfectly fine for now!
- CHESTplate fix
- added compability for new storage blocks\Items
- Scout
- Create
- Extended Drawers
- travelersbackpack
- Fixed launching the server with client-side code, the server was trying to run code that added tooltips and client-side packet receiving
- Update tooltips logic (completely rewritten tooltips file)
- tooltips rewrited
- added tooltips to backpacks compat
- bug fixes
- Added overload effect config
- Added trinkets compat
- Bugfixes
- maxweight and pockets values increased
- formatted values for easy reading
- fixed so that the spectator player is not skipped when overloaded
- new localizations and updates of old ones
- fixing bugs related to the menu
- updated calculations with blocks and items
- now we have the values for SlabBlock (divide by 2) and StairsBlock (multiply by 0.75)
- calculations of transparent blocks have been updated, now instead of subtracting the value from capped 50, we divide each value by 5
- calculations of objects now include isFood and isFireproof parameters
- fixed a bug that armor was subtracted when filling in maxweight, it should be a reduction of damage that players can do
- reduced cap for the effect from 70 to 10
- added realism mode, weight gradually reduces speed, attack and attack speed
- small bug fixes
- fixing a bug in the PlayerEntityMixin.overloadJumpEffect calculations, the effect of the code worked even when there was no OVERLOAD on the player, and because there was no OVERLOAD, the Velocity calculation was incorrect and at 50% MAX_WEIGHT the player jumped 1.1 blocks and could, for example, jump over a wall or fence
- added new localizashun: LOL CAT :3
- added modmenu compat, added update_checker and links
- Improved overload and normal weight support
