Megawatt-hours to kilowatt-hours (MWh to kWh) converter

What is a megawatt-hours to kilowatt-hours converter?

A megawatt-hours to kilowatt-hours converter is an online tool that translates an amount of energy expressed in megawatt-hours (MWh) into its equivalent in kilowatt-hours (kWh), and back again. Both units measure the same physical quantity, electrical energy, and differ only by a factor of one thousand. The megawatt-hour is the unit of choice for utility-scale figures, such as the output of a power plant or the monthly consumption of a factory, while the kilowatt-hour is the familiar unit printed on household electricity bills. Switching between the two is a routine task in energy reporting, billing, and engineering, and this converter removes the arithmetic so you can focus on the numbers that matter.

How does the converter work?

The converter has two linked fields. Enter a value in the megawatt-hours field and the kilowatt-hours field updates instantly; type a value in the kilowatt-hours field and the megawatt-hours field follows. Because the relationship between the units is fixed, the tool simply multiplies or divides by 1,000 behind the scenes. Each field also lets you switch to related energy units such as joules (J), kilojoules (kJ), and megajoules (MJ), so the same tool can handle conversions across the whole energy scale, not just between MWh and kWh.

Formula for conversion

The “mega” prefix means one million and the “kilo” prefix means one thousand, so one megawatt is one thousand kilowatts. Applied over the same one-hour period, this gives a direct relationship between the energy units:

For megawatt-hours to kilowatt-hours: $\text{kWh} = \text{MWh} \times 1000$

For kilowatt-hours to megawatt-hours: $\text{MWh} = \text{kWh} \div 1000$

If you need the value in joules, recall that one watt-hour equals 3,600 joules, so: $\text{J} = \text{MWh} \times 3{,}600{,}000{,}000$

Conversion table

The following table lists common megawatt-hour values alongside their kilowatt-hour equivalents:

Examples

Example 1: One megawatt-hour to kilowatt-hours

Convert 1 MWh to kilowatt-hours by multiplying by 1,000:

$1 \text{ MWh} \times 1000 = 1000 \text{ kWh}$

So a single megawatt-hour is exactly one thousand kilowatt-hours.

Example 2: Kilowatt-hours back to megawatt-hours

A facility records 2,000 kWh of consumption and wants the figure in megawatt-hours. Divide by 1,000:

$2000 \text{ kWh} \div 1000 = 2 \text{ MWh}$

The 2,000 kWh therefore equals 2 MWh.

Example 3: A larger plant output

A small generating unit produces 50 MWh during a day. To express this in the units shown on a domestic meter, multiply by 1,000:

$50 \text{ MWh} \times 1000 = 50000 \text{ kWh}$

That is 50,000 kilowatt-hours of energy.

Example 4: Megawatt-hours to joules

To see how large a megawatt-hour is in SI base energy units, convert 1 MWh to joules:

$1 \text{ MWh} \times 3{,}600{,}000{,}000 = 3{,}600{,}000{,}000 \text{ J}$

One megawatt-hour equals 3.6 billion joules (3.6 gigajoules).

Notes

• The conversion factor between MWh and kWh is exactly 1,000, with no rounding involved.
• Megawatt-hours are typically used for utility-scale quantities, while kilowatt-hours appear on household bills, so choosing the right unit keeps reports readable.
• Do not confuse energy units (MWh, kWh) with power units (MW, kW). Power is the rate of energy use; energy is power multiplied by time.
• Because the relationship is a clean power of ten, you can convert by hand simply by shifting the decimal point three places.

Frequently asked questions

How many kilowatt-hours are in a megawatt-hour?

There are exactly 1,000 kilowatt-hours in one megawatt-hour, because one megawatt equals one thousand kilowatts.

How do I convert kilowatt-hours to megawatt-hours?

Divide the number of kilowatt-hours by 1,000. For example, 2,000 kWh divided by 1,000 gives 2 MWh.

What is the difference between a megawatt-hour and a megawatt?

A megawatt (MW) is a unit of power, the rate at which energy is produced or used. A megawatt-hour (MWh) is a unit of energy, the amount delivered when one megawatt runs for one hour.

How many joules are in a megawatt-hour?

One megawatt-hour equals 3,600,000,000 joules, which is 3.6 gigajoules. This comes from multiplying 1,000,000 watts by 3,600 seconds.

Is the conversion between MWh and kWh exact?

Yes. Both units are defined within the same metric system, so the factor of 1,000 is exact and introduces no rounding error.

Can I convert MWh to other energy units with this tool?

Yes. Each field lets you choose joules, kilojoules, or megajoules in addition to megawatt-hours and kilowatt-hours, so you can move between these units in a single step. To go the other direction, you can also use our kilowatt-hours to megawatt-hours converter.