Free Parallel Resistance Calculator
Calculate total resistance of resistors connected in parallel: 1/R_total = 1/R1 + 1/R2.
Ω
Ω
Total Resistance
66.6667 Ω
Total Resistance vs Resistor 1
Parallel Resistance
Resistors in parallel share the same voltage, and the reciprocals of their resistances add.
Formula
1/R_total = 1/R1 + 1/R2 + ...
For two resistors: R_total = (R1 * R2) / (R1 + R2)
The total is always less than the smallest individual resistor.
Example Calculation
Two resistors in parallel: 100 Ω and 200 Ω.
- 011/R = 1/100 + 1/200 = 0.01 + 0.005 = 0.015
- 02R = 1 / 0.015 = 66.67 Ω
- 03Or: R = (100 * 200) / (100 + 200) = 20000 / 300 = 66.67 Ω
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