Parallel Plate Capacitor Capacitance Calculator

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Plate Capacitor Capacitance Calculator

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These calculator computes the capacitance between two parallel plates. The first calculator is metric, whereas the second is inches. Small valued capacitors can be etched into a PCB for RF applications, but under most circumstances it is more cost effective to use discrete capacitors. Various dielectric constants are listed below.

Equation:

C= K*Eo*A/D, where Eo= 8.854x10-12

where:

K is the dielectric constant of the material,
A is the overlapping surface area of the plates,
d is the distance between the plates, and
C is capacitance

C= K*0.2248*A/d

Common Dielectric Constants

Vacuum	1
Air	1.00054
Teflon	2.1
Polyisobutylene	2.2
Mineral Oil	2.23
Polyethylene	2.25
Polystyrene	2.4�2.7
Kraft Paper	2.6
Table Salt	3�15
Polycarbonate	3.1
Paper	3.5
Silicon dioxide	3.7
FR4	4.2
Concrete	4.5
Glass	4.7 (3.7�10)
Halowax	5.2
Chlorinated Diphenyl	5.3
Ruby Mica	6.5-8.7
Diamond	5.5�10
Rubber	7
Aluminum Oxide	8.4
Glass	10
Graphite	10�15
Silicon	11.68
Tantalum Pentoxide	28
Methanol	30
Niobium Oxide	40
Titanium Dioxide	80
Water	88�80.1�55.3�34.5 (0�20�100�200 �C)
Titanium Dioxide	86�173
Strontium Titanate	310
Barium Titanate (Class1)	5-450
Barium Titanate (Class 2)	200-12000

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