Updated
Using Parallel plate capacitance calculator
Calculate ideal parallel-plate capacitance C = permittivity × overlapping area ÷ separation.
You supply absolute permittivity; do not enter relative permittivity without multiplying by the appropriate vacuum value. The default is an arbitrary arithmetic example, not a material table. Ignores fringing, frequency dependence, tolerances and dielectric breakdown.
A worked example
Example inputs: plate overlap area (m²) = 0.01, plate separation (m) = 0.001, absolute dielectric permittivity (f/m) = 1e-11. Ideal capacitance (F) = 1e-10.
Before you use the result
You supply absolute permittivity; do not enter relative permittivity without multiplying by the appropriate vacuum value. The default is an arbitrary arithmetic example, not a material table. Ignores fringing, frequency dependence, tolerances and dielectric breakdown.
Example results for plate overlap area (m²)
These examples use Plate separation (m): 0.001; Absolute dielectric permittivity (F/m): 1e-11. They are reference calculations, not recommended settings.
| Plate overlap area (m²) | Ideal capacitance (F) |
|---|---|
| 0.005 | 5e-11 |
| 0.01 | 1e-10 |
| 0.02 | 2e-10 |
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ToolOctopus. “Parallel plate capacitance calculator.” Updated 2026-09-26. https://tooloctopus.com/parallel-plate-capacitance-calculator.
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