Capacitance Calculator   •   66pacific.com

 An online calculator for designing and evaluating capacitors based on the capacitor's area, spacing, number, and dielectric constant
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Area of one plate
 square inches

Separation distance
 inches

Number of plates (2 or more)
  

Dielectric constant


Units of Measurement
 


 
To use the calculator:
1. Choose the units of measurement.
2. Enter the area of one plate.
3. Enter the separation distance.
4. Enter the number of plates.
5. Select the dielectric constant.
6. Press Calculate.
RESULTS:
 Capacitance:

Input Values:
Area:
Separation distance:
Number:
Dielectric Constant:

Source:
The ARRL Handbook

Related Pages:
Capacitive Reactance Calculator
Small Transmitting Loop Antenna

Fig. 1. Capacitor with three 4-square-inch plates


Example
Figure 1 shows a capacitor with three 4-square-inch plates, separated by 0.25 inches of air. Its calculated capacitance is 7.18 picofarads.

If instead of air, glass (dielectric constant 7.8) occupies the gap between the plates, the calculated capacitance rises to 55.9 picofarads.

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