How to use the parallel plate capacitor calculator
Find capacitance from plate area and gap. Enter plate area, plate separation, dielectric constant in the fields above; the capacitance is computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- A — Plate area (cm²)
- d — Plate separation (mm)
- er — Dielectric constant
Worked example
With plate area = 100 cm², plate separation = 1 mm, dielectric constant = Air, the calculator gives capacitance ≈ 88.54188 pF.
Frequently asked questions
What is the formula for the parallel plate capacitor calculation?
Capacitance (pF) = er × EPS0 × A × 1e-4 / (d × 1e-3) × 1e12. Here A is plate area (cm²), d is plate separation (mm), er is dielectric constant.
What inputs do I need for the parallel plate capacitor calculator?
You need plate area in cm², plate separation in mm, dielectric constant. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.