Capacitance Calculator

Calculate the capacitance of a parallel plate capacitor from plate area, separation, and dielectric constant using C = ε₀εᵣA/d.

Plate Area

sq ft

Plate Separation

Dielectric Constant (εᵣ)

Tab to move between fields

Capacitance

88.54

UnitpF

Electric Field at 1 V1,000 V/m

How to Use This Calculator

Enter Plate Area, Plate Separation, and Dielectric Constant (εᵣ).
Review the Capacitance result.
Use Unit and Electric Field at 1 V (V/m) to inform your decision.
Use the chart to visualize the results and explore different scenarios by adjusting inputs.

How the result changes with Plate Separation

Plate Area: Area of each capacitor plate in square meters. 0.01 m² = 100 cm².
Plate Separation: Distance between the two plates. Smaller separation gives larger capacitance.
Dielectric Constant (εᵣ): Relative permittivity of the material between plates. Vacuum = 1, paper ≈ 3.5, glass ≈ 5–10.

Identify Input Parameters
Plate Area = 0.01, Plate Separation = 0.001, Dielectric Constant (εᵣ) = 1 = 3 input(s) provided
Calculate Capacitance
Capacitance = displayCapacitance
88.54 = 88.54
Calculate Unit
Unit = displayUnit.trim()
pF = pF
Calculate Electric Field at 1 V
Electric Field at 1 V
1000 = 1000