The Difference Between A Kilowatt And Kilowatt-Hour

Though kilowatt and kilowatt-hour sound like they mean the same thing, the reality is, they are two different things. They both interrelates units of measurement, but the main difference between them is that kilowatt only reveals the rate of electricity usage while kilowatt-hour indicates the total amount of energy consumed in an hour.

The technical difference between the two is that a kilowatt is a unit used to measure power while kilowatt-hour is used to measure power. However, the terms energy and power are usually used interchangeably by mistake. Energy can be defined simply as the ability to do work, while power is the rate at which the energy is used during doing of work.

The four most common physical quantities of electricity are voltage, current, resistance, and power.

Each of these quantities is measured using different measurement units.

Voltage is measured in volts, which is abbreviated as V

Current is measured in amps and is abbreviated as A

Power is measured in watts and is abbreviated as W

While resistance is measured in ohms

Conversion of Volts/Amps/Watts


While volts, amps, and watts are all units of measurements used in electricity, it does not mean that they are all interrelated.

You cannot convert amps to watts and vice versa since amps are coulombs per second whereas watts are power.

However, if you are two of volts, amps, or watts, then the mission unit can be found since watts are volts x amps.

You can combine the power of several ac or dc devices by just adding up the individual energy ratings in watts of each device.



Uses of Watts

Watts’s rates are used when you want to eliminate the heat produced by the device using the watts or if you would wish to know the cost of energy being consumed by the device since the bill will come in kilowatt-hours.

The uses of Volt-Amperes

Volt-amperes offer useful insights into the amount of power drawn by a circuit or device, provided you know the voltage.

You can also combine the apparent power of several dc devices by adding volt-amperes linearly. There is no straightforward way to combine the apparent power or current of several ac devices since the current or power for each device is not essentially in level with each other, thus you can’t add them linearly.

However, you can approximate it by adding individual volt-ampere ratings together, though the value that you will get will be more than or equal to the actual total.

The Relationship Between Voltage, Current, and Resistance

The relationship between voltage, current, and resistance is defined by Ohm’s Law, which states that V = I X R, where I is current flowing through a circuit, and R is the resistance of the circuit.  You can make conversions from different units like Volts can be converted to microvolts according to calculatorology.

What are Ohms?

Ohm is the SI unit of electrical resistance, transferring a current of one ampere when exposed to a probable difference of one volt. So, resistance is measured in ohms, represented by the sign Ω (omega). 


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