Electric Charge Calculator
Calculate the electrical charge in coulombs and in Ah from the amperage and the time. The charge is the strength of the amperage in a time, the formula is
Please fill in two of the three lines to calculate the third value. For time, one of the four possible inputs is sufficient.
Example: if an amperage of 50 amperes is maintained for two hours, the resulting charge is 360 kilocoulombs or 100 ampere-hours.
Electric charge is also known as the quantity of electricity; it indicates how strongly something reacts to an electromagnetic field, or generates or amplifies one. The symbol Q for electric charge comes from the Latin word quantum, which roughly means certain quantity. Things can be positively or negatively charged, or electrically neutral. Electric charge can also be expressed as positive or negative. For example, a proton has a charge of 1.602 * 10-19 C, and an electron has a charge of -1.602 * 10-19 C. These charges are also known as elementary charges; their unit is e; the charge of an electron is correspondingly -e.
The amperage indicates the amount of current, which is the amount of charge that is flowing through a conductor per unit of time. If you multiply the current by an amount of time, the time factor cancels out, leaving you with a quantity that is independent of time. Therefore, electric charge actually has nothing to do with time, although the time factor appears in the calculation from the amperage.
If you use the often-used image that electric current is comparable to a river, the current corresponds to the cross-section of a river and the voltage to the gradient, then you can think of electric charge as an amount of water.