Use this free online calculator to convert Watt to Milliwatt instantly. This power conversion tool provides accurate results for all your measurement needs.

Quick Reference

1 Watt = 1000.00 Milliwatt

1 Milliwatt = 1.000e-3 Watt

Watt to Milliwatt Conversion Formula

To convert Watt to Milliwatt, multiply by 1000.00.

Milliwatt = Watt × 1000.00

Watt = Milliwatt × 1.000e-3

To convert Milliwatt back to Watt, divide by 1000.00 (or multiply by 1.000e-3).

About These Units

About Watt

The watt is the SI unit of power. Power is the rate at which work is done, or (equivalently) the rate at which energy is expended. One watt is equal to a power rate of one joule of work per second of time. This unit is used both in mechanics and in electricity, so it links the mechanical and electrical units to one another. In mechanical terms, one watt equals about 0.001 341 02 horsepower (hp) or 0.737 562 foot-pound per second (lbf/s). In electrical terms, one watt is the power produced by a current of one ampere flowing through an electric potential of one volt. The name of the unit honors James Watt (1736-1819), the British engineer whose improvements to the steam engine are often credited with igniting the Industrial Revolution.

About Milliwatt

The milliwatt is a common unit of power equal to 0.001 watt.

Watt to Milliwatt Conversion Table

Watt	Milliwatt	Milliwatt	Watt
0.1	100.0000	0.1	1.000e-4
0.5	500.0000	0.5	5.000e-4
1	1000.00	1	1.000e-3
2	2000.00	2	2.000e-3
5	5000.00	5	5.000e-3
10	10000.00	10	0.010000
20	20000.00	20	0.020000
25	25000.00	25	0.025000
50	50000.00	50	0.050000
100	100000.00	100	0.100000
250	250000.00	250	0.250000
500	500000.00	500	0.500000
1000	1000000.00	1000	1.0000

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