Parallel Resistance Calculation Formula
1/Rtotal = 1/R1 + 1/R2 + ... +
1/Rn
Take the reciprocal to get the total resistance.
Simplified Parallel Resistance Formulas
For specific scenarios, simpler calculation methods apply:
1. When all resistors have the same value (R) and quantity (n):
Rtotal = R / n
2. For two resistors:
Rtotal = R1 × R2 / (R1 + R2)
Parallel resistors form a common node by sharing both ends, treated as a single unit. They are widely used in electronics design, hardware debugging, and maintenance for setting specific resistance values and current division.
In such circuits, all resistors share the same voltage. The total current is the sum of individual currents, and the total resistance is lower than any single resistor's value.
Parallel Resistor Calculator
Enter R1~R2 to calculate total resistance