Current Converter

What is an Ampere?

Ampere is a unit of measurement for electric current. It represents the rate of flow of electric charge, and is defined as the flow of one coulomb per second. The ampere is used to quantify the amount of electric charge flowing through a conductor, and is a fundamental unit of measurement in the International System of Units (SI).

Amperage and Ohm's Law

Ohm's Law states the current between two points on a conductor is proportional to the voltage and inversely proportional to the resistance. Using Ohm's Law, it's possible to express the current in amperes as an expression using resistance and voltage.

I_A = V_V/R_Ω

The current in amperes is equal to the potential difference in volts divided by the resistance in ohms.

How Much is an Ampere?

The ampere, commonly referred to as an "amp," is the electrical current constant equal to the flow of one coulomb per second.

The ampere was previously defined as a constant current that when passed through two straight and parallel conductors that are spaced one meter apart, will produce a force equal to 0.0000002 newtons per meter of length.

In 2019, the ampere was redefined as the electric current corresponding to the flow of 1/(1.602 176 634 × 10^-19) elementary charges per second.