Calculate the total equivalent resistance of resistors connected in parallel.
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Calculation Results
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About this calculator
Overview
Connecting resistors in parallel provides multiple paths for electric current to flow. The total resistance of the circuit decreases as more resistors are added.
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Pro Tips
Total resistance is always less than the smallest individual resistor.
The formula is 1/R_total = 1/R1 + 1/R2 + ... + 1/Rn.
If all resistors are the same value (R), the total is simply R/n.
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Fun Facts
"Parallel circuits are used in home wiring so each appliance receives the full voltage."
"The total current is the sum of currents through each branch: I_total = I1 + I2 + ..."
"The inverse of resistance is called conductance, measured in Siemens (S). G_total = G1 + G2 + ..."
