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Series and Parallel Resistance — result sheet
Equivalent resistance of a resistor list in series or parallel.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Series R = sum; parallel 1/R = sum(1/R_i).
Series resistances simply add. Parallel combines conductances, so the result is always smaller than the smallest branch.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Resistances (ohms) — 1-1,000 positive values.
- Connection — 2 choices
Worked example
| Input | Value |
|---|---|
| Resistances (ohms) | 10, 20, 30 |
| Connection | series |
60 ohms series; 5.45 ohms parallel.
Assumptions and limits
- Ideal ohmic resistors, DC.
- All values positive.
- At most 1,000 resistors.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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