Dielectric Constant Calculator

Calculate permittivity and capacitance for dielectric materials

Select Material:

Relative Permittivity (εᵣ):

Parallel Plate Capacitor (optional)

Plate Area (cm²):

Separation (mm):

Measured Capacitance (pF): (for εᵣ calculation)

About Dielectric Constants

The dielectric constant (relative permittivity) describes how a material polarizes in an electric field, reducing the effective field strength and increasing capacitance.

Key Formulas:

ε = ε₀εᵣ (absolute permittivity)
C = ε₀εᵣA/d (parallel plate capacitor)
χ = εᵣ - 1 (electric susceptibility)
D = εE (electric displacement)

Applications:

Capacitor design
High-k gate dielectrics
Microwave substrates
Energy storage devices