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Converting Amps to Watts -
Converting Watts to Amps

Convert Watts to Amps and vice versa


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Amps and Watts

What are Amps?

The ampere, abbreviated as A, is the unit of electrical current in the International System of Units (SI). This unit is named after the French physicist and mathematician André-Marie Ampère, who is considered one of the founders of electrodynamics.

Electric current, measured in amps, is the amount of electric charge that passes through a conductor or electric circuit per second. It essentially indicates how many electrons (charge) are flowing through a wire at any given time.

What are Watts?

Watt, abbreviated as W, is the unit of power in the International System of Units (SI). The unit is named after the Scottish engineer James Watt, known for his work on steam engines. In the context of electricity, power is the rate at which electrical energy is generated or consumed.

The Relationship Between Amps and Watts

Although both amps and watts are important units in the world of electricity, they represent different physical quantities. Amps is a measure of electrical current, while watt is a measure of power. The relationship between these two units is determined by the voltage, which is measured in volts (V).

According to Ohm's law, the voltage is equal to the current (I, in amps) multiplied by the resistance (R, in ohms). The amount of power (P, in watts) in a circuit is equal to the voltage (V, in volts) multiplied by the current (I, in amps). Therefore, the power (in watts) can also be expressed as the current (in amps) squared multiplied by the resistance (in ohms).

If we know what the voltage in a circuit is, we can convert amps to watts (and vice versa) using the formula P=IV, where P is the power in watts, I is the current in amps, and V is the voltage in volts.


For example, a device that draws 2 amps of current at a voltage of 230 volts consumes a power of 2A * 230V = 460 watts. Conversely, a device that consumes 460 watts at a voltage of 230 volts draws a current of 460W / 230V = 2 amps.

Note that this simple relationship only applies to DC (direct current) circuits or to AC (alternating current) circuits in which the current and voltage are in phase. For more complex situations, such as AC circuits with phase shift between current and voltage, we also have to take into account the power factor.


Although watts and amps measure different aspects of electricity, they are closely interconnected. Knowing how they relate to each other is essential for understanding electrical circuits and the safe and efficient use of electrical appliances.

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