Convert Power from Milliwatts to Megawatts (mW to MW)

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Milliwatt to Megawatt Conversion Formula

To convert from Milliwatt (mW) to Megawatt (MW), use the following formula:

Megawatt (MW)

= 11000 × 1106× Milliwatt (mW)

= 1109× Milliwatt (mW)

= 10-9× Milliwatt (mW)


Example

Let's convert 5 Milliwatt (mW) to Megawatt (MW).

Using the formula:

5 × 10-9 = 5× 10-9

Therefore, 5 Milliwatt (mW) is equal to 5× 10-9 Megawatt (MW).

How many milliwatts are in one megawatt? One Megawatt (MW) contains 109 Milliwatts (mW) — the inverse of the factor above. Multiplying by 10-9 takes you from milliwatts to megawatts; multiplying by 109 brings you back.

Put in words: one milliwatt equals 10-9 megawatts, so the milliwatt is the smaller unit of this pair. Converting between them never changes the amount of power being measured — only the size of the unit you count it in.

What is a Milliwatt (mW)?

A milliwatt (mW) is a unit used to measure power.

It is equal to one-thousandth of a watt.

To put it simply, you need 1,000 milliwatts to equal one watt (1 W = 1,000 mW).


What Are Milliwatts Used For?

The milliwatt (mW) is the perfect unit for measuring the small amount of power used by many common electronic devices.

For example, the power of a Wi-Fi signal, the laser in a Blu-ray player, and the tiny LEDs on your electronics are all measured in milliwatts.

Using such small amounts of power is key to making the batteries last longer in your favorite gadgets, including wireless earbuds, smartwatches, and TV remotes.


How Do You Convert Milliwatts? (mW to Watts and dBm)

While the most common conversion is between milliwatts and watts (1,000 mW = 1 W), some technical fields use a different unit.

In telecommunications and fiber optics, power is often measured in dBm (decibels relative to one milliwatt). This scale makes it easier to work with a vast range of power levels.

For reference, 0 dBm is equal to exactly 1 mW.


Why Milliwatts (mW) Are Important for Laser Safety

When it comes to products with lasers, the milliwatt (mW) rating is a critical safety measure.

To prevent eye injuries, regulatory bodies like the FDA classify lasers based on their power output in milliwatts.

For example, handheld laser pointers sold to the public are legally required in most regions to have a power output of less than 5 mW.

This is a clear example of how milliwatt ratings are used to keep consumers safe.

What is a Megawatt (MW)?

A megawatt (MW) is a unit used to measure power.

It's equal to one million watts.

To put it simply, it's a way to describe a huge amount of electricity being used or generated at a single moment.


How Many Homes Can 1 MW Power?

One megawatt (1 MW) can power between 750 and 1,000 homes at any given moment.

This number can change depending on what's running in each home (like air conditioning on a hot day).

It's a helpful estimate used by grid operators to understand how much electricity a community needs.


The Difference: Megawatt (MW) vs. Megawatt-hour (MWh)

It's easy to mix up megawatts (MW) and megawatt-hours (MWh). Here's a simple way to understand the difference between MW vs. MWh:

  • Megawatt (MW) measures power, or how fast energy is being used right now. Think of it as the speed of electricity.
  • Megawatt-hour (MWh) measures energy, or the total amount of electricity used over a period of time. This is the volume of electricity used.

So, a power plant has a capacity measured in MW (how much electricity it can make at once).

In contrast, your electricity bill shows your consumption in MWh (how much you actually used over a month).


How Big is a Megawatt? Real-World Examples

A megawatt is a tremendous amount of power. To understand its scale, here's a look at the capacity of different power sources:

  • Onshore Wind Turbine: 2 to 5 MW
  • Utility-Scale Solar Farm: 50 to 500 MW
  • Modern Nuclear Power Plant: Over 1,000 MW (which is 1 gigawatt or GW)

Milliwatt to Megawatt Conversion Table

Here are some quick reference conversions from Milliwatt (mW) to Megawatt (MW):

MilliwattsMegawatts
0.000001 mW10-15 MW
0.001 mW10-12 MW
0.1 mW10-10 MW
1 mW10-9 MW
2 mW2× 10-9 MW
3 mW3× 10-9 MW
4 mW4× 10-9 MW
5 mW5× 10-9 MW
6 mW6× 10-9 MW
7 mW7× 10-9 MW
8 mW8× 10-9 MW
9 mW9× 10-9 MW
10 mW10-8 MW
20 mW2× 10-8 MW
30 mW3× 10-8 MW
40 mW4× 10-8 MW
50 mW5× 10-8 MW
100 mW10-7 MW
1000 mW10-6 MW
10000 mW10-5 MW