This calculator helps you to compute Voltage, Current, Resistance, Power and wattage rating of a resistor in an electronic circuit. This calculator needs a minimum of two inputs to calculate the results. All the fields except Power can be used as input.
**Voltage, Current, Resistance : Input/Output, Power: Output.
You can also determine the necessary wattage rating of a resistor to use in a circuit using this calculator. As a rule of thumb use resistor which has wattage rating twice the actual power dissipation in it.
FORMULAS:
This calculator uses variations of Ohms law to calculate results
To determine voltage
V = IR
To determine Current
I = V / R
To determine resistance
R = V / I
To calculate power
P = VI