Resistors in Series / Parallel Calculator

Enter resistor values and calculate equivalent resistance for series and parallel connections.

Choose series or parallel.
Comma-separated. You can use decimals (e.g., 4.7).
Series: Rₑq = R₁ + R₂ + …
Parallel: 1/Rₑq = 1/R₁ + 1/R₂ + …
Units: ohms (Ω).