Unit nAs nanoampere-second Electric Charge A nanoampere-second (nAs) is a unit used to measure electric charge in the field of electrical engineering and physics. It is a compound unit derived from the combination of ampere, which is the base unit for electric current, and second, which is the unit for time. 1 nanoampere-second (nAs) is equal to 1 x 10^(-9) ampere-seconds (As), meaning it represents one-billionth (1/1,000,000,000) of an ampere-second. It is a smaller unit to measure the electric charge, appropriate for situations when working with tiny amounts of electric charge, such as in micro or nanoelectronics. In practical terms, an electric charge of 1 nanoampere-second indicates that an electric current of 1 nanoampere (1 x 10^(-9) A) flows in a circuit for a duration of 1 second. Essentially, the nanoampere-second provides a way to express the product of electric current and time, which signifies the quantity of electric charge that has passed through a given point in a circuit.