Ohm's Law Calculator

The tool used to calculate the relationship between voltage, amperage and resistance in a circuit, enter any 2 values to get other values and press the calculate button

Ohms Law Calculator

Ohm's law calculation formula

Voltage V in volts (V) divided by resistance R in ohms (Ω) gets current I in amps (A):

- I = V / R


- I = 60V / 20Ω = 3A

The power P in watts (W) is equal to the voltage V in volts (V) times the current I in amps (A):

- P = V × I


- P = 60V × 3A = 180W