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Ohm's Law Calculator
Online ohm's law calculator: calculates voltage / current / resistance / power.
Enter 2 values to get the other values and press the Calculate button:
Resistance 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):
Current 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):
Voltage calculations
The the voltage V in volts (V) is equal to the current I in amps (A) times the resistance R in ohms (Ω):
The the voltage V in volts (V) is equal to the power P in watts (W) divided by the current I in amps (A):
The 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):
Power calculation
The the power P in watts (W) is equal to the voltage V in volts (V) times the current I in amps (A):
The 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 the power P in watts (W) is equal to the squared current I in amps (A) times the resistance R in ohms (Ω):
See also
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