Watts To Amps Calculator

A watt and an ampere are two different amounts of electricity. While the former calculates the amount of energy consumed by the load at a given moment, the latter calculates the amount of current drawn by the load. You can use the following calculator to calculate kilowatts from amps.

Watts To Amps Conversion Calculator

Watts Volts Amps

What are AMPs ?

Amps measure the flow of electricity as an electric current. You should think of electric current as the flow of water through a hosepipe. The more water flowing through the hosepipe, the stronger the current is.

What are WATTs ?

Watt is the basic unit of power in electrical systems. It can also be used in mechanical systems. It measures how much energy the system releases every second. In our battery diagram, the amount of voltage and current in the bulb determines how much energy is released.

How to calculate number of WATTS ?

All you need to know are two things. As mentioned in the previous calculations, you need to know the current of your circuit. You also need to know what voltage your outlet can handle. Then multiply the current by the number of volts. This is the maximum number of watts your circuit can support at one time. Exceeding this value may result in electric shock.

Simple WATT - AMP - VOLT Formula

Converting watts to amps can be done using the power formula, which states that I = P / E, where P is power measured in watts, I is current measured in amps, and E is voltage measured in volts.

Watts = Amps x Volts

Volt = Watts / Amps

Amps = Watts / Volts

Each of these quantities are measured using different units:

For example, find the amperage of 1200 watts at 120 volts

current = power / voltage
current = 1200W / 120V
current = 10A

AC and DC power systems

The labels AC and DC are used to describe the types of current flow in a circuit. For direct current (DC) the electric current flows only in one direction. However, in alternating current (AC) the electric current changes direction at several times per second.

Single-Phase AC Circuit Watts to Amps Conversion

Converting watts to amps for a single-phase AC circuit with power factor uses a slightly different formula.

I(A) = P(W) / V(V) × PF

Watts To Amps Conversion

Three-Phase AC Circuit Watts to Amps Conversion

Using Line to Line Voltage

For three-phase AC circuits where the line to line voltage is known, the formula to convert watts to amps is:

I(A) = P(W) / VL-L(V) × PF × √3

The current I in amps is equal to the power P in watts divided by the line to line voltage V in volts multiplied by the power factor PF multiplied by the square root of 3.

Using Line to Neutral Voltage

For three-phase AC circuits where the line to neutral voltage is known, the formula to convert watts to amps is:

I(A) = P(W) / VL-N(V) × PF × 3

The current I in amps is equal to the power P in watts divided by the voltage V in volts multiplied by the power factor PF multiplied by 3.

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