This is a professional, production-ready, single-file HTML application. It uses Tailwind CSS for layout, Lucide for iconography, and vanilla JavaScript for state management and calculations. ```html
Easily calculate your loop's thermal dissipation potential by inputting your radiator specifications.
Total Surface Area
0 cm²
Thermal Capacity
0 Watts
1. Add Radiator Slots: Click "Add Radiator Slot" to define each radiator in your loop.
2. Input Specs: Select your radiator size (e.g., 240mm), specify thickness, FPI (Fins Per Inch), and fan configuration.
3. Capacity Meaning: Your total thermal capacity is an estimate of how many Watts of heat your loop can dissipate before reaching equilibrium with ambient air. A good rule of thumb is to aim for ~100W per 120mm of radiator length, assuming medium fan speed.
Disclaimer: This tool provides estimates only. Real-world performance depends heavily on case airflow, pump speed, ambient room temperature, and water block efficiency.