UTILLAB
Home
About
Β© Copyright 2026Β UtilLab
About usPrivacy Policy

Kilowatt [kW] to Milliwatt [mW] Converter

Quick Reference

1 Kilowatt (kW) = 1000000 Milliwatt (mW)

1 Milliwatt (mW) = 1.0000e-6 Kilowatt (kW)

How to Convert Kilowatt to Milliwatt

1 kW = 1000000 mW
1 mW = 0.000001 kW

To convert Kilowatt to Milliwatt, multiply the value by 1000000. To convert Milliwatt back to Kilowatt, divide by 1000000.

Example: convert 10 kW to mW:
10 kW = 10 x 1000000 = 10000000 mW

↔ Convert Milliwatt to Kilowatt

Kilowatt

Definition: A kilowatt (kW) is a unit of power equal to one thousand (10Β³) watts. It is a multiple of the base unit, the watt, in the International System of Units (SI).

History/origin: The watt is named in honor of Scottish inventor James Watt. The kilowatt, as a decimal multiple of the watt, was derived as a larger unit for measuring significant amounts of power.

Current use: Kilowatts are used to measure the power consumption of appliances, electric motors, and industrial equipment. It is also used to measure the power output of generators and engines.

Milliwatt

Definition: A milliwatt (mW) is a unit of power equal to one thousandth (10⁻³) of a watt. It is a subunit of the base unit, the watt, in the International System of Units (SI).

History/origin: The watt is named in honor of Scottish inventor James Watt. The milliwatt, as a decimal multiple of the watt, was naturally derived as a smaller, more convenient unit for measuring smaller powers.

Current use: Milliwatts are used to measure small power levels in electronic circuits, audio equipment, and wireless communication devices. It's used where power consumption is low.

Kilowatt to Milliwatt Conversion Table

Kilowatt [kW]Milliwatt [mW]
1 kW1000000 mW
2 kW2000000 mW
5 kW5000000 mW
10 kW10000000 mW
20 kW20000000 mW
50 kW50000000 mW
100 kW100000000 mW
200 kW200000000 mW
500 kW500000000 mW
1000 kW1000000000 mW

Common pairs of Power

Watt

Watt to MilliwattWatt to KilowattWatt to MegawattWatt to Gigawatt

Milliwatt

Milliwatt to WattMilliwatt to KilowattMilliwatt to MegawattMilliwatt to Gigawatt

Kilowatt

Kilowatt to WattKilowatt to MilliwattKilowatt to MegawattKilowatt to Gigawatt

Megawatt

Megawatt to WattMegawatt to MilliwattMegawatt to KilowattMegawatt to Gigawatt

Gigawatt

Gigawatt to WattGigawatt to MilliwattGigawatt to KilowattGigawatt to Megawatt

Kilowatt [kW] to Milliwatt [mW] Converter

To convert Kilowatt to Milliwatt, enter your value in the kW field above and the result in mW will appear instantly. You can also use the conversion factor shown in the table on this page to calculate manually. The formula is always the same: multiply your kW value by the fixed conversion ratio to get the equivalent in mW.
Our Kilowatt to Milliwatt converter uses standardized conversion factors defined by international scientific and metrological organizations. All calculations are performed with full floating-point precision. You can also choose how many decimal places to display in the result, so you get exactly the level of detail you need.
Yes, absolutely. Simply swap the source and destination units in the converter β€” select mW as your input unit and kW as your output unit. The same precision and standardized conversion factor applies in both directions.
Converting between Kilowatt and Milliwatt comes up regularly in engineering, scientific research, construction, and everyday tasks that involve measurements from different unit systems. Our converter eliminates the risk of manual calculation errors and saves time whenever you need to switch between these two units.
Yes, the Kilowatt to Milliwatt converter is completely free. No account or registration is required, and there are no usage limits. It works on any device β€” smartphones, tablets, and desktop computers β€” directly in your browser.
Kilowatt and Milliwatt are both units used to measure the same physical quantity, but they belong to different measurement systems or represent different scales. The mathematical relationship between them is fixed and constant, which is what makes accurate conversion possible. Scroll up to see the exact conversion factor, formula, and a reference table for common values.