Volts and Amps are different units and can't be compared as you suggest.
12
12 milliamp is 12 thousandths of an amp or 0.0012
50,000 mV
900,000 Volts. That is Nine Hundred Thousand volts.
6200 millivolts = 0.0062 kilovolts.
1000 microamps = 1 milliamp
1 amp = 1000 milliamp, so 1 milliamp = (1/1000) amps = 0.001 amps
To convert wattage to kilovolts, you typically need more information. Wattage is a measure of power, while kilovolts are a measure of voltage. The conversion will involve using the formula P (watts) = V (volts) x I (current), where V is the voltage in kilovolts. By rearranging the formula to solve for V, you can convert wattage to kilovolts if you know the current as well.
1000 milli (meaning 1/1000) ampere does equal one ampere
550, as 1 kV = 1000V
0.8 amps is equivalent to 800 milliamps.
2 amps mili means 1,000