A micro-amp is a measure of current. Power in Watts is a function of the current and voltage. Impossible to answer your question without knowing the voltage. For example, 1 uA (micro-amp) x 10 Volts...
1 million
a gigawatt is equal to one billion watts, therefore a gigawatt is equal to one million kilowatts.
"mega-" = one million, so 1 megawatt = 1 000 000 watts. So 10 mW = 10 000 000 W.
1kW = 1000W 50kW = 50000W