This page is a web application that design circuits of resistors.
Use this utility to find the optimum set of resistors for a circuit of resistors from the resistor sequence.

Voltage Divider

Voltage Divider2

Parallel and Series of two Resistors

Equivalent Resistor Ra

Parallel

Series

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The Ra is resistance to place in parallel and in series of two resistors to create a non standard resistance.
This tool find the optimum set of resistors R1,R2 and R3,R4 for a desired Ra value.

Calcurate for resistances to divide a voltage (to branch a current)

Equivalent Resistor Ra

Parallel

Series

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Three More resistors circuit is often combined to divide a voltage (to branch a current).
This tool find the optimum set of R1,R2…RN resistors for a desired Ra value from a close resistor value as even as combining resistances.