The Capacitance Calculator determines the capacitance of a parallel plate capacitor using the formula C=ε0εrAdC = \varepsilon_0 \varepsilon_r \frac{A}{d}C=ε0​εr​dA​, where CCC is the capacitance in farads, AAA is the area of one plate in square meters, ddd is the separation between plates in meters, ε0\varepsilon_0ε0​ is the vacuum permittivity 8.854×10−128.854\times10^{-12}8.854×10−12 F/m, and εr\varepsilon_rεr​ is the relative permittivity of the dielectric material between the plates. By entering the plate area, separation, and dielectric constant, users can quickly find the capacitance value in farads, microfarads, nanofarads, or picofarads. This calculator is useful for electronics students, engineers, and anyone designing capacitive circuits.