# Total Resistance of Series, Parallel Circuit

Find the combined resistance of multiple resistors connected in series or parallel configurations.

Calculate the total resistance in a circuit using this online calculator. In a series circuit, the total resistance is obtained by summing up the individual resistor values. In a parallel circuit, the total resistance is determined by adding up the reciprocals of the resistor values and taking the reciprocal of the sum.

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R_1 = \frac{V_t}{I_t}

R_2 = \frac{V_{t2}}{P_t}

R_3 = \frac{P_t}{I_{t2}}

**Where:**

- R
_{1}= Total Resistance by V_{t}and I_{t} - R
_{2}= Total Resistance by V_{t}and P_{t} - R
_{3}= Total Resistance by P_{t}and I_{t} - V
_{t}= Total Voltage - I
_{t}= Total Current - P
_{t}= Total Power