The Extreme Reactors 2 Calculator is not accessible on small screens. The planner requires a larger display to properly view and edit reactor layouts. Please use a desktop or laptop for the full tool.
This project is an interactive planner for designing and simulating Extreme Reactors 2 reactor layouts before building them in game.
The calculator provides real time feedback for power generation, fuel usage, heat, and efficiency.
View RF/t, steam output, heat, and fuel usage instantly.
Test moderators and fuel rod arrangements before building.
Simulation behavior is based on Extreme Reactors 2.
Publicly available and open to community contributions.
This project was inspired by the original Big Reactors planner at br.sidoh.org, recreated for Extreme Reactors 2 with a modern interface and updated simulation support.
The goal was to create a fast and accessible way to design, test, and optimize reactors without relying entirely on in game experimentation.