Capacitance Converter
About Capacitance Units
Capacitance is the ability of a system to store an electric charge. The SI unit of capacitance is the farad (F), named after Michael Faraday. In electronics, smaller units like microfarads (µF), nanofarads (nF), and picofarads (pF) are commonly used.
Common Capacitance Conversions
- 1 farad = 1,000 millifarads (mF)
- 1 farad = 1,000,000 microfarads (µF)
- 1 microfarad = 1,000 nanofarads (nF)
- 1 nanofarad = 1,000 picofarads (pF)
Frequently Asked Questions
What is the difference between microfarads, nanofarads, and picofarads?
These are all metric subdivisions of the farad. 1 microfarad (µF) equals 1,000 nanofarads (nF), and 1 nanofarad equals 1,000 picofarads (pF). In electronics, microfarads are common for power supply filtering and coupling capacitors, nanofarads for signal processing, and picofarads for high-frequency RF circuits.
Why is the farad such a large unit?
The farad is defined as the capacitance that stores one coulomb of charge at one volt. This is an enormous amount of charge for practical circuits. Most electronic components use capacitance values ranging from picofarads (10^-12 F) for RF filters to millifarads for power supply decoupling. Supercapacitors, used in energy storage, can reach several farads.
How do I read capacitor markings?
Ceramic capacitors often use a three-digit code where the first two digits are the value and the third is a multiplier in picofarads. For example, 104 means 10 followed by four zeros in picofarads, equaling 100,000 pF or 100 nF (0.1 µF). Electrolytic capacitors usually have the value printed directly in microfarads.
What capacitance values are most commonly used in electronics?
The most frequently used values follow the E12 or E24 series. Common capacitors include 100 pF, 1 nF, 10 nF, 100 nF (0.1 µF), 1 µF, 10 µF, 100 µF, and 1000 µF. The 100 nF (0.1 µF) decoupling capacitor is arguably the single most commonly used capacitor in digital electronics.