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Plate Capacitor Capacitance Calculator

See our other Electronics Calculators.

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. 


C= K*Eo*A/D, where  Eo= 8.854x10-12


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

A (plate area) (mm2)
d (distance) (mm)
K (dielectric constant )

Capacitance (uF)
Capacitance (pF)



C= K*0.2248*A/d

A (plate area) (sq. in.)
d (distance) (inches)
K (dielectric constant )  

C (Capacitance) (pF)


Common Dielectric Constants

Vacuum 1
Air 1.00054
Teflon 2.1
Polyisobutylene 2.2
Mineral Oil 2.23
Polyethylene 2.25
Polystyrene 2.42.7
Kraft Paper 2.6
Table Salt 315
Polycarbonate 3.1
Paper 3.5
Silicon dioxide 3.7
FR4 4.2
Concrete 4.5
Glass 4.7 (3.710)
Halowax 5.2
Chlorinated Diphenyl 5.3
Ruby Mica 6.5-8.7
Diamond 5.510
Rubber 7
Aluminum Oxide 8.4
Glass 10
Graphite 1015
Silicon 11.68
Tantalum Pentoxide 28
Methanol 30
Niobium Oxide 40
Titanium Dioxide 80
Water 8880.155.334.5
(020100200 C)
Titanium Dioxide 86173
Strontium Titanate 310
Barium Titanate (Class1) 5-450
Barium Titanate (Class 2) 200-12000

Capacitor Manufacturer Links

The best way to find capacitors is to use our free Electronics Component Directory, where a myriad of manufactures are listed.

Other Electronics Links

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