The most basic calculation is volts multiplied by amps of a circuit for a single phase load.
Divide the watts by the voltage of the circuit.
The formula to calculate the relationship between amps, volts and watts is Volts X Amps = Watts or Volts = Watts / Amps or Amps = Watts / Volts therefore; 200 Watts divided by 1.95 Amps is 102.5641 Volts.
calculate amp usage
Depends on the voltage. AMPS X VOLTS = WATTS 250 Watts at 12 V would be about 21 Amps, while 250 watts at 120 volts would be 2.1 amps.
To calculate the amps, you can use the formula: Amps = Watts / Volts. So, for 2000 watts and 110 volts, 2000 watts / 110 volts equals approximately 18.18 amps.
In normal simple circuits WATTS = VOLTS x AMPS So if you use a 12V car battery 4 amps is 48 Watts American 110V mains 4 amps = 440 Watts English 240V mains 4 amps = 960 Watts
There is no direct conversion between the two. You need to know voltage to calculate amps. This is the equation: P = V * I Where: P = Watts V = Volts I = Amps
Amperage (coulombs/sec sort of like volume) and wattage (power) are independent of each other if you know the voltage you can calculate amps but they are not the same thing. 3000 watts/X volts=amps ex. 3000 watts/110v=27.28 amps
If the wattage of a load is known then the current can be calculated. Watts equals amps times volts. You would use the following formula, Amps = Watts/Volts.
Just multiply. (Note, this assumes no phase difference.) <<>> The formula you are looking for is W = I x E. Watts = Amps x Volts.
The formula you are looking for is I = W/E.
Divide Watts by Volts ; this gives you Amps.
watts Divided by Volts = amps