Parametroniq is an intelligent nonlinear-optics calculator designed to explore the physics of Four Wave Mixing (FWM) gain spectra with precision and elegance. It computes both parametric gain (dB) and phase matching bandwidth (nm) from core optical parameters such as pump power, nonlinear coefficient, dispersion, and wavelength. Featuring a beautifully crafted gradient interface, responsive validation, and instant sharing tools, it transforms complex equations of nonlinear amplification into accessible visual results. Whether you’re optimizing fiber amplifiers, testing integrated photonic circuits, or studying wavelength conversion, Parametroniq delivers a clear and interactive way to understand how phase matching and dispersion shape the spectral response of nonlinear light interactions.