# Watts / Volts / Amps / Ohms calculator

Use this calculator to determine Watts (W), Volts (V), Amps (A), and Ohms (Ω).

It's designed for DC power, voltage, current, and resistance calculations.

Just input any two values, and the tool will compute the others. Click 'Calculate' to get results.

Enter 2 values to get the other values and press the Calculate button:

### Ohms calculations

The resistance R in ohms (Ω) is equal to the voltage V in volts (V) divided by the current I in amps (A):

The resistance R in ohms (Ω) is equal to the squared voltage V in volts (V) divided by the power P in watts (W):

The resistance R in ohms (Ω) is equal to the power P in watts (W) divided by the squared current I in amps (A):

### Amps calculations

The current I in amps (A) is equal to the voltage V in volts (V) divided by the resistance R in ohms (Ω):

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

The current I in amps (A) is equal to the square root of the power P in watts (W) divided by the resistance R in ohms (Ω):

### Volts calculations

The voltage V in volts (V) is equal to the current I in amps (A) times the resistance R in ohms (Ω):

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

The voltage V in volts (V) is equal to the square root of the power P in watts (W) times the resistance R in ohms (Ω):

### Watts calculation

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

The power P in watts (W) is equal to the squared voltage V in volts (V) divided by the resistance R in ohms (Ω):

The power P in watts (W) is equal to the squared current I in amps (A) times the resistance R in ohms (Ω):

How does the Watts/Volts/Amps/Ohms calculator work?

This calculator uses the relationships between power (Watts), voltage (Volts), current (Amps), and resistance (Ohms) in electrical circuits. Input any two known values, and the calculator will determine the other two for you, simplifying electrical calculations.