Total Resistance Calculator - Series and Parallel Combination - OneSDR

This tool calculates the total resistance of a series and parallel combination of resistor values.

Enter the series and parallel resistor values in two separate input fields separated by commas.

Series and Parallel Resistance Combination Formula

R_parallel = (1/R₁ + 1/R₂ + 1/R₃+…. + 1/R_n)^-1

R_series = R₁ + R₂ + R₃+…. + R_n

R_total = R_parallel + R_series

Consider three resistors in parallel: 1 Ω, 3 Ω, and 5 Ω and two resistors in series: 1 Ω and 2 Ω

The total parallel resistance R_parallel = 0.652 Ω

The total series resistance R_series = 3 Ω

The total effective resistance R_total = 3.652 Ω