Power (Watt) Conversion calculator

Enter the value and type of watt and press convert;

Watt to mW, kW, MW, GW, dBm, dBW conversion calculator

Power Converters


Microwatts (µW): 0
Milliwatts (mW): 0
Watts (W): 0
Kilowatts (kW): 0
Megawatts (MW): 0
Gigawatts (GW): 0
decibel milliwatts (dBm): 0

SI unit: Power

Power is the amount of energy transferred or converted per time. Power is the SI derived unit having the symbol as 'W' and it is equal to one joule per second.

1 Watt is defined as,

1W = 1J/1s

J = joule per electric charge
s = second

Volt can also be represented as current flow of one ampere with one volt.

1W = 1A . 1V

Watt conversion standard table:

Name Symbol Conversion
Microwatts µW 10-6 W
Milliwatts mW 10-3 W
Watts W -
Kilowatts kW 103 W
Megawatts MW 106 W
Gigawatts GW 109 W

Voltage to Watt conversion

The power in Watts can be derived from volts and from amperes.

W = V x A

  • W - watts
  • V - volts
  • A - amperes

  • watts to dBm conversion

    The power P in decibel milliwatts (dBm) can be calculated from watts as below;

    P(dBm) = 10 * log10( PmW/1mW )

    See also: