Capacitance Calculator

Calculates the capacitance or electrical capacity in farads from the charge in coulombs and voltage in volts. The formula is capacitance is charge per voltage, C = Q / U, the unit farad is calculated as 1F = 1C / 1V.
Please enter any two values ​​and select the units to calculate the remaining value.

Example: 5 coulombs at a voltage of 20 kilovolts corresponds to a capacity of 250 microfarads.

The term capacitance comes from Latin and means capacity. In the case of electricity, this capacity is a stored amount of charge, which means it is a certain number of charged particles. Electrical capacitance is often used in connection with a capacitor. A capacitor stores electrical energy statically. Put simply, the larger a capacitor is, the more energy it can store, although other factors such as shape and material also play a role.
If we take a plate capacitor, often used in school experiments, as an example, then with a surface area of ​​100 square centimeters and a plate spacing of one millimeter, it has a capacitance of approximately 0.9 nanofarads. Plate capacitors for technical applications are of course larger, but therefore also more expensive and dangerous. If a voltage of 100 volts is applied to this small capacitor, the charge is 90 nanocoulombs.
Capacitors play an important role in many electrical devices. Due to their ability to quickly store and release electricity, they are used for many applications. One of these is information storage. A computer's integrated circuit can contain billions of tiny capacitors. In DRAM memory, for example, each capacitor stores only one bit. Such a capacitor has a size well below one nanofarad, ranging from 10^-15 to 10^-10 farads, with the higher value corresponding to 0.1 nanofarad.