Parallel Resistance Calculator (Multiple)
Combine up to four parallel resistors into one equivalent value.
Result
How to use
- Enter your values in the fields above.
- Press Calculate to see your result instantly.
- Use the Share button to copy a link to your result.
About this calculator
Resistors wired in parallel all share the same voltage but split the current, so their combined resistance follows 1/R_total = 1/R1 + 1/R2 + 1/R3 + 1/R4 — and the total is always smaller than the smallest individual resistor, since adding a parallel path always makes it easier for current to flow.
This calculator also reports total conductance (the reciprocal of resistance, in siemens), which is often easier to work with since conductances in parallel simply add. Electronics designers use parallel combinations to hit resistor values that aren't sold off the shelf, or to split current across multiple components — like paralleling shunt resistors in a current-sensing circuit.
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