Milliwatts to Megawatts Converter
Enter the power in milliwatts below to convert it to megawatts.
Convert Milliwatts to Megawatts
Enter a value in milliwatts (mW) to convert to megawatts (MW).
Milliwatt to Megawatt Conversion Table
Table showing various milliwatt measurements converted to megawatts. Click any preset value or arrow to load it into the converter.
| Milliwatts (mW) | Megawatts (MW) |
|---|---|
| 1 mW | 1e-9 MW |
| 10 mW | 0.00000001 MW |
| 100 mW | 0.0000001 MW |
| 1,000 mW | 0.000001 MW |
| 10,000 mW | 0.00001 MW |
| 100,000 mW | 0.0001 MW |
| 1,000,000 mW | 0.001 MW |
| 5,000,000 mW | 0.005 MW |
| 10,000,000 mW | 0.01 MW |
| 25,400,000 mW | 0.0254 MW |
How to Convert Milliwatts to Megawatts
To convert milliwatts to megawatts, multiply the power by the following conversion ratio: 1e-9 megawatts/milliwatt.
Since one milliwatt is equal to 1e-9 megawatts, you can use this simple formula to convert:
The power in megawatts is equal to the power in milliwatts multiplied by 1e-9.
For example, here's how to convert 5 milliwatts to megawatts using the formula above.
How Many Megawatts Are in a Milliwatt?
There are 1e-9 megawatts in a milliwatt, which is why we use this value in the formula above.
Our milliwatt to megawatt calculator automatically converts your power measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Milliwatts and megawatts are both units used to measure power. Keep reading to learn more about each unit.
What Is a Milliwatt?
A milliwatt is a unit of power equal to 1/1,000 of a watt (0.001 W). One-thousandth of a Watt. [1]
The milliwatt is classified as a metric and SI-compatible unit of power. Milliwatts can be abbreviated as mW; for example, 1 milliwatt can be written as 1 mW.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the milliwatt (mW) a convenient decimal multiple of the watt (W).
In practice, milliwatts (mW) are widely used across fine-tolerance laboratory, analytical, and micro-scale power measurements within SI metric workflows, engineering documentation, and technical data sheets.
What Is a Megawatt?
A megawatt is a unit of power equal to 1,000,000 watts (W), the base unit for power. Equal to 1,000,000 Watts (1,000 kW). [2]
The megawatt is classified as a metric and SI-compatible unit of power. Megawatts can be abbreviated as MW; for example, 1 megawatt can be written as 1 MW.
In the metric system, "mega" is the standard SI prefix for millions, or 10⁶. This makes the megawatt (MW) a convenient decimal multiple of the watt (W).
In practice, megawatts (MW) are widely used across large-scale industrial, bulk, and macro-level power specifications within SI metric workflows, engineering documentation, and technical data sheets.
When converting power between milliwatts (mW) and megawatts (MW), keep full floating-point precision (1 mW = 1e-9 MW; 1 MW = 1,000,000,000 mW) during intermediate calculations and round only the final megawatt figure to match your instrument tolerance.
More Milliwatt & Megawatt Conversions
Need to calculate in the opposite direction? Use our megawatts to milliwatts calculator to switch your starting unit immediately. You can also explore related tools such as converting megawatts to milliwatts, converting watts to horsepower (hp), or converting horsepower (hp) to watts.
Convert from Milliwatts
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Power & Radiant Flux))·Power Metrology Standard — Milliwatts (mW) to Megawatts (MW)
- [2]NIST CUU SpecificationNIST CUU (Derived SI Unit: Watt (W))·Unit Specifications: Milliwatt (mW) & Megawatt (MW)
- [3]BIPM ReferenceBIPM (SI Brochure (9th Ed.) — Power)·Conversion Factors & Mathematical Basis (mW to MW)