Real-time item throughput monitoring for Minecraft containers.

Item Flow Monitor adds an unobtrusive UI overlay to standard containers (chests, hoppers, furnaces, and more) that shows the rate of items flowing through them — in items/min or items/hour. Perfect for players who build farms and want to measure farm efficiency and production rates without manual counting, timers, or extra blocks.

This mod does not add any new blocks or items. It only adds an informational overlay to existing container screens.

Item Flow Monitor Demo

Features

Real-time flow rate — see items/min or items/hour directly in the container UI

Flow rate overlay on a chest

Time-to-full estimate — hover over the rate to see when the container will be full

Time-to-full estimate on hover

Three calculation modes — Average (stable long-term), Actual (exact count per window), Predicted (real-time EMA estimate)
All standard containers — chests, double chests, hoppers, furnaces, blast furnaces, smokers, barrels, dispensers, droppers, shulker boxes
Flexible item tracking — track all items, auto-detect the first item, or manually select a specific one
Configurable via Mod Menu — toggle tracking per container type
12 languages — English, Русский, 中文, Español, Deutsch, Français, 日本語, 한국어, Português, Italiano, Polski, Українська
Lightweight — observer-based architecture, zero overhead without active trackers

How to Use

Install the mod (requires Fabric API)
Open any container and click the IFM button
Toggle tracking ON, choose your period and calculation mode
The flow rate overlay appears in the corner of the container screen
Hover over the rate to see estimated time until the container is full

Settings panel

Carpet Hopper Counters vs Item Flow Monitor

If you've used Carpet hopper counters to measure farm rates — Item Flow Monitor solves the same problem, but differently:

	Carpet Hopper Counters	Item Flow Monitor
Setup	Hopper → wool block + `/counter` command	Open any container, click one button
Where you see results	Chat via command	Directly in the container UI
Items	Destroyed by counter	Stay in the container
Use case	Technical testing, tick warp	Survival gameplay

Compatibility

Client + Server — install on both sides for accurate real-time data
Lithium compatible — observer-based tracking, no hopper mixin conflicts
Works with Mod Menu, Sodium, Iris, Fabric API
Tested on Minecraft 1.21.11

FAQ

Q: Does it work on vanilla servers? A: The mod requires server-side installation for tracking. Client-only mode is not currently supported.

Q: Does it affect performance? A: No. The mod only tracks containers with active trackers. Zero overhead without trackers.

Q: Can I hide the overlay for specific container types? A: Yes — configure through Mod Menu → Item Flow Monitor.