#
Capacitance Calculator

**RESULTS:**

Capacitance:
**Input Values:**
Area:
Separation distance:
Number:
Dielectric Constant:
**References:**
The ARRL Handbook for Radio Communications
**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**.

**Capacitor with three 4-square-inch plates**
**Example**
The diagram 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**.

**Related Pages:**
Capacitive Reactance Calculator
Small Transmitting Loop Antenna