The Series / Parallel Resistance Calculator totals any number of resistors and reports both the series and the parallel equivalent at once, so the two topologies can be compared directly.
Series / Parallel Resistance Calculator
Total up to eight resistors in series or parallel, see both equivalents at once, and get current, power and the per-resistor share from a supply voltage.
Network
Resistor values
Supply (optional)
Results
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series total
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parallel total
Notes
About Series / Parallel Resistance Calculator
Features
- Add as many resistor rows as needed
- Series total
- Parallel equivalent
- Both shown at the same time
- Count of resistors included
How to Use
- Add a row per resistor.
- Enter each resistance in ohms.
- Read the series and parallel totals.
Examples
Example: two 10 ohm resistors -> 20.000 ohms in series and 5.000 ohms in parallel.
Benefits
- Avoids reciprocal errors in parallel networks
- Side-by-side totals make the topology choice obvious
Frequently Asked Questions
What does this calculator do?
Total up to eight resistors in series or parallel, see both equivalents at once, and get current, power and the per-resistor share from a supply voltage.
Is my data stored?
No. Everything runs in your browser; nothing is uploaded, saved or logged.