Calculate the total equivalent resistance of resistors connected in parallel. In parallel circuits, the voltage across each resistor is the same.
Enter your values below
First resistor value.
Second resistor value.
Optional third resistor. Leave blank to ignore.
How this calculator works
In a parallel circuit, the reciprocal of total resistance equals the sum of the reciprocals of individual resistances. Total resistance is always less than the smallest resistor.
Common questions about this calculator
These calculators are for educational and informational purposes only. While we strive for accuracy, results should be verified for critical applications. Always consult authoritative sources for engineering or scientific work.
