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Series and Parallel Resistor Calculator

Enter several resistor values (comma separated) to compute the series total (sum) and parallel total (reciprocal of the sum of reciprocals), shown with a circuit diagram.

Input

Enter resistor values separated by commas and choose the connection type to compute the equivalent resistance. Both series and parallel are calculated at once.

ohm

Example: 100, 220, 330. Spaces also work as separators.

Connection type

Choose which connection type to highlight as the main result.

Result

Series equivalent resistance

650ohm

Parallel equivalent resistance

56.896552 ohm

Number of resistors

3

100220330Series: 650 ohm

The series total is the sum of each resistor: R = R1 + R2 + … + Rn (ohm).

How it works

  • Series total is the simple sum of each resistor: R=R1+R2+…+Rn (ohm).
  • Parallel total is the reciprocal of the sum of reciprocals: 1/R=1/R1+1/R2+…+1/Rn (ohm).
  • The series total is at least the largest resistor, while the parallel total is at most the smallest resistor.
  • Resistor values can be entered as any number of comma or space separated values.
  • All resistor values must be positive (greater than zero).

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