Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of electric charges: positive and negative (commonly carried by protons and electrons respectively). Like charges repel and unlike attract. An absence of net charge is referred to as neutral. An object is negatively charged if it has an excess of electrons, and is otherwise positively charged or uncharged. The SI derived unit of electric charge is the coulomb (C). In electrical engineering, it is also common to use the ampere-hour (Ah). This Charge converter allows you to convert abcoulomb (abC), ampere-hour (A·h), ampere-minute (A·min), ampere-second (A·s), coulomb (C), Elementary charge (e), EMU of charge, ESU of charge, faraday (carbon 12) (F), franklin (Fr), kilocoulomb (kC), microcoulomb (µC), millicoulomb (mC), nanocoulomb (nC), picocoulomb (pC), statcoulomb (stC), among other units related to Charge.