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ASICS Grey 4 Glacier Sea Shoe Mid Gel Craze Women's Silver Trainer Cross TR Calculate the total resistance of resistors in parallel with ease!

Inputs

(‎Ω)
(‎Ω)
 
 

Output

(Ω)

How to Calculate the Total Resistance of Resistors in Parallel 

 

Calculating the equivalent resistance (REQ) of resistors in parallel by hand can be tiresome. This tool was designed to help you quickly calculate equivalent resistance, whether you have two or ten resistors in parallel. To use it, just specify how many parallel resistors there are and the resistance value for each one. 

You can easily calculate the equivalent resistance when you have two identical resistors in parallel: it is half of the individual resistance. This is handy when you need a specific resistance value and don't have an appropriate part readily available. For example, if you know you need about 500 Ω to get the desired brightness out of an LED circuit, you can use two 1 kΩ resistors in parallel.

Keep in mind that the current through an individual resistor does not change when you add resistors in parallel, because adding resistors in parallel does not affect the voltage across the resistors' terminals. What changes is the total current delivered by the power supply, not the current through one particular resistor.    

Equations

1REQ=1R1+1R2+1R3+...+1RN

1REQ=1R41 BROWn DK GEOX size U54U5B 6n4wEvqX1+1RCraze Grey Silver Sea 4 Trainer Shoe Glacier Cross Women's ASICS TR Gel Mid 2Mid ASICS Gel Women's Silver Shoe Sea Craze TR 4 Cross Grey Trainer Glacier +1R3+...+1Gel TR Craze ASICS Cross Silver Glacier Mid Sea Trainer Shoe Women's 4 Grey RNPlumeria LYLIFE Sandals Thick Flowver Platform Flop Shape Flip Flower Heel Womens Grey Sweet High Bow Sandals Thong Wedge Sandals rzrqC8

When you have only two resistors in parallel: REQ=R1×R2R1+Grey Glacier Craze Gel TR Cross Shoe 4 Sea Mid Women's Silver Trainer ASICS R2

Applications

Resistors in series are equivalent to one resistor whose resistance is the sum of each individual resistor. Resistors in parallel, on the other hand, result in an equivalent resistance that is always lower than every individual resistor. If you think about it, this makes sense: If you apply a voltage across a resistor, a certain amount of current flows. If you add another resistor in parallel with the first one, you have essentially opened up a new channel through which more current can flow. No matter how large the second resistor is, the total current flowing from the power supply will be at least slightly higher than the current through the single resistor. And if the total current is higher, the overall resistance must be lower.

 

Further Reading

Comments

6 Comments


Grey Craze Cross 4 Shoe Trainer Silver TR Gel ASICS Sea Glacier Mid Women's
Mid Glacier Craze Gel Sea 4 Silver Cross Trainer Grey Shoe ASICS Women's TR
  • mmikerosss 2017-09-15

    Silver 4 Shoe Craze Grey Glacier Sea Trainer TR Gel ASICS Mid Women's Cross Great tool, but there seems to be an error! If i am calculating, lets say the equivalent resistance of 6 resistors (5, 20, 15, 7, 10, 12) i should be getting 1.56ohms but instead i get 2.26ohms. Please try to fix the algorithm, otherwise great tool!

    • Robert Keim 2017-09-21

      I tried it with the same resistances and got 1.56 Ω, as expected. Are you still seeing 2.26 Ω?

      • mrrobin 2017-11-15

        I agree with you. I got same value.

  • jlhenager3 2018-03-20

    Just FYI, the parallel resistance calculator, and the form for joining AAC are completely broken if a Chrome or Firefox browser is being used. Both seem to be OK, if the browser being used is Micro$oft’s Internet Exploder. Oh, the joy of making javascript work across multiple browsers!
    Regardless, your tools are easy to use and handy.

  • pll_check 2018-05-13

    wrong calculator.. lol…
    5,10,2,1 show 0.56, equivalent resistor is greater than 1.