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Conversion - Watts, Amps, Voltage

Calculations of volts, amps, watts and power are easily explained using Ohms Law. Ohms Law is the relationship of any DC circuit. Us the image on the right displays the relationships.

Now you can use our easy to use Ohms Law Calculator.

The calculations are simple. The main to consider when calculating is if the measurements that you are using are all in the correct formats. The Ohms Law Calculator we provided will help you with that. The decimal being in the wrong place during a conversion could cause issues in your results or even in your equipment and or device that you are applying it to. Always double check your work.

Ohm's Law Formula Chart. Displaying the formulas for Resistance, Power, Voltage and Current.
Converting Watts to Amps - If you know Watts and Volts
The conversion of Watts to Amps is governed by the equation Amps = Watts/Volts (I = W/V)
Example: 10W/5V = 2A
Converting Watts to Volts - If you know Watts and Amps
The conversion of Watts to Volts is governed by the equation Volts = Watts/Amps (V = W/I)
Example 100W/10A = 10V
Example: 48W/12A = 4V
Converting Amps to Watts - If you know Amps and Volts
The conversion of Amps to Watts is governed by the equation Watts = Amps x Volts (W = I ยท V)
Example: 1A * 110V = 110W
Converting Amps to Volts - If you know Volts and Wattage is fixed
The conversion of Amps to Volts is governed by the equation Amps = Watts/Volts (I = W/V)
Example: 48W / 12A = 4V
Converting Volts to Watts - If you know Amps and Watts
The conversion of Volts to Watts is governed by the equation Watts = Amps x Volts (V = W/I)
Example: 1.5A * 12V = 18W
Converting Volts to Amps- If you know Volts and Wattage is fixed
The conversion of Volts to Amps is governed by the equation Volts = Watts/Amps (V = W/I)
Example: 120W/110V = 1.09A
Legend
W - Watts
I - Amps (ampere)
V - Volts