Mod Decoded

How modded Minecraft machines actually work. Every calculator is built on the mods' real formulas, pinned to the exact mod version, and checked against in-game builds, not guessed from creative-mode tests.

Tools

Extreme Reactors · 1.21.1-2.4.28 Turbine Calculator

Pick coils from a JEI-style list, set the steam flow and casing size, and watch the turbine build in 3D. RPM and RF/t come straight from TurbineLogic.

Extreme Reactors · 1.21.1-2.4.28 Reactor Calculator

Paint fuel rods and coolant blocks, choose passive or active cooling, and the reactor is simulated tick by tick until it settles: RF/t, steam, temperatures and fuel burn.

Colossal Reactors · 26.1.2-2.6.0.0.0 Reactor Calculator

Paint rods and heat sinks or use the Reactor Builder's patterns: RF/t or steam, fuel burn and turbine blades, with the FTB Evolution 2 config built in.

Colossal Reactors · 26.1.2-2.6.0.0.0 Turbine Calculator

Casing, rods, blade rings and coils: RF/t, steam use and a parts list. Finds a turbine for your reactor's steam, with the FTB Evolution 2 config built in.

Mekanism · 1.21.1-10.7.19 Fission Reactor Calculator

Lay out fuel assemblies, set the burn rate, and see reactor temperature, max safe burn, steam, and how many industrial turbines you need, with ATM10 and Aeronautics presets.

Mekanism · 1.21.1-10.7.19 Fusion Reactor Calculator

Air or water cooling at any injection rate: FE/t, steam, turbines needed, the lowest rate that stays lit, and the 400M FE laser shot that ignites it.

Mekanism · 1.21.1-10.7.19 Dynamic Tank Calculator

Fluid and chemical capacity for any size, the smallest tank that holds what you need, fill time and comparator levels. Download it as a schematic.

Mekanism · 1.21.1-10.7.19 Ore Processing Calculator

2x to 5x, each tier built on the last: machines, FE/t, oxygen, HCl and acid plants, and a 3D build with side config. Plus why raw ore isn't really 5x.

Create Aeronautics 1.3.2 · Create Propulsion Airship Calculator

Will it fly? Add up block weight, balloon volume, burners, levitite, propellers and thrusters to see lift, the altitude it settles at and its top speed.

Ryzer Gen · 1.21.1-0.1.2-alpha Fission Station Calculator

Plan the 5×5 core channel by channel and watch it in the station, drawn from the mod's own model. Power, core temperature, water and intake pumps, rod life, and a schematic to build it.

Applied Energistics 2 · 19.2.17 · MEGA Cells Crafting CPU Calculator

Type the bytes and co-processors a job needs and get the smallest CPU that has them: storage, crafting speed, power and materials. Download it as a schematic.

Advanced AE · 1.6.12 Quantum Computer Calculator

Get the smallest Quantum Computer for a job's bytes and co-processors, with your pack's config. Storage, threads, parallel jobs, power and materials, and a schematic to build it.

HBM's NTM · 1.7.10-1.0.27 RBMK Reactor Calculator

Paint a 15×15 graphite core, drop in 31 kinds of fuel rod, and the RBMK is simulated tick by tick: neutron streams, xenon poison, column heat, steam, and the AZ-5 tip that makes the scram dangerous.

HBM's NTM · 1.7.10-1.0.27 ZIRNOX Reactor Calculator

Paint the 24-slot core and trade neighbour decay bonuses against CO2 pressure: steam, meltdown margin and rod life, down to the float rounding in the mod's own steam formula.

HBM's NTM · 1.7.10-1.0.27 Fusion Reactor Calculator

One of ten fusion recipes, any klystron rig: the ignition gate, the 43.75% share each receiver gets with four, the MHDT's 5M plasma cliff, and the steam, neutrons and EU that come out.

HBM's NTM · 1.7.10-1.0.27 Graphite Pile Calculator

Build the pile layer by layer and run its 12-ray neutron Monte-Carlo: flux maps, concrete and boron shadowing, rod heat that self-damps, and the time to breed plutonium and tritium.

HBM's NTM · 1.7.10-1.0.27 Research Reactor Calculator

Slide the control rod over a grid of plate fuels and watch the self-coupled cascade settle, melt down, or feed a breeder: equilibrium flux, temperature, and the highest safe level.

Guides

Extreme Reactors · ATM10 · ATM10: Aeronautics Why your ATM10 turbine doesn't make the power the guides say

The same turbine makes 12× default power in ATM10 and 0.4× in ATM10: Aeronautics. Tested in-game and traced to one config file.

Mekanism · ATM10 · ATM10: Aeronautics Mekanism power in ATM10 vs ATM10: Aeronautics, setting by setting

Fission is ¼ of default in ATM10 and 1/125 in Aeronautics, fusion 1/100, and small turbines are tank-limited in both. Every changed setting, with what it means.

How answers are made

Checked against the mod

Formulas and constants match how the mod actually works, not old wiki numbers, and we check them against real in-game builds.

Pin the version

Mechanics change between releases, so every page names the exact mod version it describes.

Test it in-game

Findings are checked in a real world before they're published.