A DC ammeter is an instrument used to measure the current strength in a DC circuit. To measure larger currents, a low-value resistor can be connected in parallel between the two input terminals to increase the measuring range. The zero point is typically located at the far left end of the scale.

DC ammeters can be divided into ammeters, milliammeters, and microammeters according to their range, represented by the symbols A, mA, and uA respectively.