ModsFinder

REI Search Bar Calculations

by BigBou

With REI Search Bar Calculations, typing a math expression into the Roughly Enough Items search bar returns its result, with no separate calculator app needed.

FabricClient-side onlyGNU Lesser General Public License v3.0 onlyOpen source1.21.5 – 26.2

What it does

The mod turns the search bar of Roughly Enough Items into a calculator. Typed expressions are evaluated as they are entered, so a player can work out a sum, a product or a unit conversion without leaving the item browser. The calculation logic was written by the team behind Not Enough Updates, which the author took and built into this mod under that project's license.

Calculations can use metric prefixes for numbers and Minecraft stacks as a unit. A command, /calc, performs the same operations outside the search bar. Typing e followed by a number selects an enchanted variant of an item, for example number 160. Because the mod is aimed at Hypixel Skyblock players, it is useful on modded servers and modpacks where the item browser is already in use.

The mod requires Mod Menu, Roughly Enough Items (REI) and YetAnotherConfigLib (YACL), all of which must be present for it to load. It is published for Fabric only, across 11 release versions covering 1.21.5 – 26.2, and it is released under the GNU Lesser General Public License v3.0 only. The source code is public.

Key features

  1. Search bar evaluation

    Expressions typed into the REI search bar are evaluated, returning the result in place of a normal item search.

  2. Metric prefixes

    Numbers can be entered with metric prefixes, so large values need not be written out in full.

  3. Stack units

    Minecraft item stacks can be used as a unit in a calculation, for quick counting of bulk materials.

  4. Calc command

    The /calc command runs the same calculations as a chat command for players who prefer typing to the search bar.

  5. Enchanted item variants

    Entering e with an item number selects its enchanted variant, so calculations can refer to enchanted items directly.

Compatibility

Latest build for each game version and loader.

26.x4 of 4 versions with builds
26.21.2.0+26.1
26.1.21.2.0+26.1
26.1.11.2.0+26.1
26.11.2.0+26.1
1.21.x7 of 7 versions with builds
1.21.111.1.1+1.21.6-11
1.21.101.1.1+1.21.6-11
1.21.91.1.1+1.21.6-11
1.21.81.1.1+1.21.6-11
1.21.71.1.1+1.21.6-11
1.21.61.1.1+1.21.6-11
1.21.51.1.0+1.21.5
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 3

YetAnotherConfigLib (YACL)A builder-based configuration library for Minecraft!
Required
Mod MenuAdds a mod menu to view the list of mods you have installed.
Required
Roughly Enough Items (REI)Clean and Customizable. Alternative to Just Enough Items/JEI.
Required

Use cases

Skyblock and modpacks

Players on Hypixel Skyblock, or in modpacks that include Roughly Enough Items, can run calculations without opening an outside calculator.

Who it’s for: Players who already use Roughly Enough Items and want quick arithmetic inside its search bar, and server owners who want the same capability through a command.

How it compares

Full comparison

Not Enough Calculator is also a Fabric mod with the same client-side environment and open source status. It is licensed under the GNU Lesser General Public License v3.0 or later and covers 1.21.5 – 26.3. REI+ is a Fabric client mod, open source under the MIT License, with files for 1.21.10 – 26.1.2. Calculator commands is an open source Fabric client mod under the MIT License for 1.20.2 – 1.20.4, McCalc is an MIT-licensed Fabric client mod for 1.19.1, and Simple Calculator is an MIT-licensed Fabric client mod for 1.21.5 only.

ModLoadersGame versionsEnvironmentUpdated
REI Search Bar CalculationsFabric1.21.5 – 26.2Client-side only2026-10-10
Not Enough CalculatorFabric1.21.5 – 26.3Client-side only2026-09-30
REI+Fabric1.21.10 – 26.1.2Client-side only2026-08-28
Calculator commandsFabric1.20.2 – 1.20.4Client-side only2024-01-20
McCalcFabric1.19.1Client-side only2022-08-21
Simple CalculatorFabric1.21.5Client-side only2025-05-27

Questions

Which dependencies does REI Search Bar Calculations need?

Mod Menu, Roughly Enough Items (REI) and YetAnotherConfigLib (YACL) are all required. Fabric is the only supported loader.

Does the mod have to be installed on a server?

No. Players add it to their own game, and a server needs no copy.

Which game versions are covered?

Files exist for 11 release versions, covering 1.21.5 – 26.2. The latest Fabric file is 1.2.0+26.1 for 26.2, dated 2026-10-10.

Is the calculation code original to this mod?

No. The calculator functionality was written by the Not Enough Updates team and adapted into this mod under that project's license.

In the catalog

REI Search Bar Calculations is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 13,894 mods support Minecraft 26.2.

Utility mods36,990Fabric modsMods for 26.213,894

Similar mods

Mod Menu1.14.4 – 26.3Reese's Sodium Options1.16.5 – 26.3Jade 🔍1.16.4 – 26.3Zoomify (Zoom)1.18 – 26.3FancyMenu1.12 – 26.3Controlling1.7.10 – 26.3

What the author says

A simple and fast calculator for everyday use! This mod was mostly made because of Hypixel Skyblock's recent update which forces players to use 1.21.5 for their newest content island, and a new mod for REI added skyblock items to it, was supposed to be the replacement for NEU for the newer version, however, REI lacks…
BigBou, on the Modrinth page

Official listing

Owner
BigBou
Published
2025-06-28
Updated on Modrinth
2026-10-10
Facts verified
2026-10-15

Tags

Utility
Open on ModrinthCompare