# Watts-volts-amps-ohms free online calculator

Watts (W) - volts (V) - amps (A) - ohms (Ω) calculator.

Calculates power / voltage / current / resistance.

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

 Resistance (R): ohms (Ω) kiloohms (kΩ) megaohms (MΩ) Current (I): microamps (μA) milliamps (mA) amps (A) kiloamps (kA) megaamps (MA) Voltage (V): microvolts (μV) millivolts (mV) volts (V) kilovolts (kV) megavolts (MV) Power (P): microwatts (μW) milliwatts (mW) watts (W) kilowatts (kW) megawatts (MW)

### 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):

Ohm's law »

Currently, we have around 1976 calculators, conversion tables and usefull online tools and software features for students, teaching and teachers, designers and simply for everyone.