Physics

Resistors in Parallel Calculator

Find total resistance of resistors in parallel.

Parameters Live Compute
Calculated Output
Total resistance (Ω) 50
Formula: 1/R = 1/R1 + 1/R2 + 1/R3
Step-by-Step Breakdown
1. Values used:
2. R1 = 100 Ω
3. R2 = 100 Ω
4. R3 = 0 Ω
5.
6. Total resistance = 50Ω
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Parallel resistance is always less than the smallest resistor.

The math behind it

1/R_total = 1/R1 + 1/R2 + … Leave unused resistors at 0.

Worked Example

100 ∥ 100 → 50 Ω.

Frequently Asked Questions

Two equal resistors?

Parallel total is half of one.

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