Milliwatts to Kilowatts Converter
Enter the power in milliwatts below to convert it to kilowatts.
Convert Milliwatts to Kilowatts
Enter a value in milliwatts (mW) to convert to kilowatts (kW).
Milliwatt to Kilowatt Conversion Table
Table showing various milliwatt measurements converted to kilowatts. Click any preset value or arrow to load it into the converter.
| Milliwatts (mW) | Kilowatts (kW) |
|---|---|
| 1 mW | 0.000001 kW |
| 10 mW | 0.00001 kW |
| 100 mW | 0.0001 kW |
| 1,000 mW | 0.001 kW |
| 10,000 mW | 0.01 kW |
| 100,000 mW | 0.1 kW |
| 1,000,000 mW | 1 kW |
| 5,000,000 mW | 5 kW |
| 10,000,000 mW | 10 kW |
| 25,400,000 mW | 25.4 kW |
How to Convert Milliwatts to Kilowatts
To convert milliwatts to kilowatts, multiply the power by the following conversion ratio: 0.000001 kilowatts/milliwatt.
Since one milliwatt is equal to 0.000001 kilowatts, you can use this simple formula to convert:
The power in kilowatts is equal to the power in milliwatts multiplied by 0.000001.
For example, here's how to convert 5 milliwatts to kilowatts using the formula above.
How Many Kilowatts Are in a Milliwatt?
There are 0.000001 kilowatts in a milliwatt, which is why we use this value in the formula above.
Our milliwatt to kilowatt calculator automatically converts your power measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Milliwatts and kilowatts 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 Kilowatt?
A kilowatt is a unit of power equal to 1,000 watts (W), the base unit for power. Equal to 1,000 Watts (1 kJ/s). [2]
The kilowatt is classified as a metric and SI-compatible unit of power. Kilowatts can be abbreviated as kW; for example, 1 kilowatt can be written as 1 kW.
In the metric system, "kilo" is the standard SI prefix for thousands, or 10³. This makes the kilowatt (kW) a convenient decimal multiple of the watt (W).
In practice, kilowatts (kW) 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 kilowatts (kW), keep full floating-point precision (1 mW = 0.000001 kW; 1 kW = 1,000,000 mW) during intermediate calculations and round only the final kilowatt figure to match your instrument tolerance.
More Milliwatt & Kilowatt Conversions
Need to calculate in the opposite direction? Use our kilowatts to milliwatts calculator to switch your starting unit immediately. You can also explore related tools such as converting kilowatts to milliwatts, converting horsepower (hp) to kilowatts, or converting megawatts to kilowatts.
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 Kilowatts (kW)
- [2]NIST CUU SpecificationNIST CUU (Derived SI Unit: Watt (W))·Unit Specifications: Milliwatt (mW) & Kilowatt (kW)
- [3]BIPM ReferenceBIPM (SI Brochure (9th Ed.) — Power)·Conversion Factors & Mathematical Basis (mW to kW)