Parallel Resistance Calculator

The uses of parallel resistance calculators

Number of resistors:
Parallel Resistance in Circuit: Om

If current passes through multiple resistors, I cannot merely add up the resistance or go by the strength of the strongest resistor. A formula must be used to calculate the total resistance of this series of resistors. A parallel resistance calculator allows me to figure out the total resistance without having to make many calculators by hand.

An overview

One should not waste their time calculating the total resistance of a circuit by hand. If I know the resistance of each resistor, I can use an online tool to calculate the total resistance of the series instantly.

If one does not use one of these online tools, the equation for only two resistors is ReQ = R1*R2 / R1+R2.

For more than two, the equation is 1/ReQ = 1/R1 + 1/R2 + 1/R3 + 1/R4 and so on for any number of resistors.

As you can see, adding more resistors in parallel actually decreases the total amount of resistance that the circuit has. If the resistors are in a series, the resistance increases with each resistor added.

If the resistors are in parallel, on the other hand than adding another resistor creates another path that the electricity can flow through.

What other tasks can this calculator solve?

This calculator can also be used to determine the capacitance of capacitors in series rather than the resistance of resistors in parallel. This can be tricky as the units are different. However, I can still use this calculator just as well for capacitors and for resistors as the formula is the same.

Can this calculator calculate more than two resistors?

Yes, any number of resistors can be calculated with this calculator. The mathematical formula works properly for any number of resistors.

The resistor’s features

A resistor is intended to block the flow of electricity in a circuit. A circuit could not work correctly without the presence of resistors and capacitors that prevent and reduce the flow of electricity.

The most important thing about a resistor is its resistance value. Resistors must be manufactured out of many different materials to achieve the desired resistance values.

Some metals are much more resistant than others. Resistors differ from one another in ways that are not limited to their resistance value. Two resistors may differ in their temperature tolerance.

As well, a resistor is judged by its stability. A stable resistor always has the same resistance and does not vary slightly. Some applications require particularly stable resistors that vary as little as possible.

For other tasks, a bit of instability will not do any harm. After a resistor has been heavily used for a long time, it may not continue to have the same resistance value. Resistors also have a maximum amount of electric charge that they can tolerate.

Exposing a resistor to higher current than its maximum will break it. While many applications involve no possibility of a current strong enough to damage resistors, it is a possibility in other applications.

Damon Coleman

Entrepreneur, robotics fan. I have a Diploma in Technical Education, interested in robotics. My favorite platforms are Arduino and Raspberry Pi. Welcome to the world of robotics!

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