Current Converter

Convert electric current between amperes, milliamperes, and related units, describing the flow rate of electric charge.

Electric Current Measures Charge Flow, the Electrical Equivalent of Water Flow Rate

Electric current measures the rate at which electric charge flows past a point, defined directly as charge divided by time, which is exactly why the ampere, the SI unit, connects directly back to the coulomb covered separately under electric charge, one ampere being defined as exactly one coulomb of charge passing a point every second. This is genuinely the same rate-based relationship seen throughout this converter set, mass over time giving mass flow rate, volume over time giving volumetric flow rate, and here, charge over time giving electric current, which is precisely why current is so often explained through the water-flow analogy, comparing current to the rate water flows through a pipe, since the underlying mathematical relationship, quantity divided by time, is genuinely identical in structure even though the physical quantities involved, water volume versus electric charge, are completely different. Milliamperes, a thousandth of an ampere, show up constantly in electronics because most small electronic components and low-power devices operate at current levels far below a full ampere, making the ampere itself, much like the metre for everyday human-scale distances, a somewhat too-large base unit for describing the small currents involved in typical consumer electronics.