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Farad (F)

Quantity: Capacitance · Category: Derived SI

The farad is the SI unit of capacitance — how much charge a capacitor stores per volt. One farad holds one coulomb at one volt; practical capacitors are usually microfarads or smaller.

Relation to SI

1 F = 1 C/V = 1 A·s/V = 1 A²·s⁴/(kg·m²)

Examples

  • Phone circuit capacitors are typically microfarads.
  • Camera flash capacitors store charge at hundreds of volts.
  • Supercapacitors reach thousands of farads for energy storage.