Extreme Reactors 2 Calculator

What is Extreme Reactors 2?

Extreme Reactors 2 is a Minecraft technology mod that allows players to generate large amounts of RF/t and steam using configurable multiblock reactors. Reactor performance depends on factors such as dimensions, internal block layout, control rod insertion, and operating conditions.

Designing an efficient reactor often requires balancing power production, fuel consumption, heat generation, and material cost. This calculator helps players experiment with different reactor designs before building them in-game.

About the project

This project is inspired by the original Big Reactors planner at br.sidoh.org, reimagined for Extreme Reactors 2 with a modern interface and implementation.

It incorporates logic and structure from Extreme Reactors 2. It also includes textures from Extreme Reactors 2 and Mekanism, both under the MIT License.

Why use an Extreme Reactors 2 calculator?

Extreme Reactors 2 reactors can be difficult to tune by trial and error because small layout changes can affect heat, fuel usage, RF/t generation, and steam production. This calculator lets you compare reactor designs before building them in Minecraft, helping you optimize performance while saving time and resources.

Use it as an ER2 reactor planner, reactor simulator, power calculator, steam calculator, fuel efficiency calculator, and material cost estimator. Reactor designs can also be shared with friends or the wider community using a single shareable link, making it easy to collaborate, compare layouts, and showcase optimized builds.

Why do some textures look different?

To avoid redistributing copyrighted game assets, some textures have been recreated or simplified using original artwork. This allows the project to remain fully open source under the MIT License while preserving the functionality of the calculator.

Vanilla Minecraft style blocks use original textures inspired by the source material, while some mod specific blocks are represented with simple placeholder textures. These visual differences do not affect the accuracy of the reactor simulation or calculations.

Learn more about Extreme Reactors 2

This calculator is designed to help plan and simulate reactor designs, but it does not attempt to explain every mechanic of Extreme Reactors 2. If you want to learn more about reactor mechanics, blocks, or gameplay, the in game documentation is the best place to start.

For those interested in the technical implementation, the calculator is fully open source and much of the simulation logic is based on the official Extreme Reactors 2 source code. Exploring the source code is a great way to understand how the simulator works and how reactor calculations are performed.

Questions or Feedback

Found a bug, have a feature request, or want to discuss the project? GitHub Issues are the best place for bug reports and feature requests. For general questions or feedback about the calculator, feel free to contact me directly.

FAQ