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General Information, Facts & Tables
[Electric Resistance Calculator]

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Overview

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The calculator below can be used to calculate the resistance for up to six resistors in either series or parallel configuration. Enter the resistance values starting at "Resistor #1", and leave a zero "0" in each of the resistor controls not required.

Note! The calculator starts at the top control and works down the list until a zero value is encountered, then performs the calculation. If you enter values in the first, second, and fourth controls, (skipping the third control), the value in the fourth control will not be included in the calculation.

See Also: Open Another, Using the Calculators
 

Formula

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Resistors in Parallel:
The total capacitance is equal to the reciprocal of the sums of the reciprocals of all of the resistors.
RTotal = 1 / (1 / R1 + 1 / R2 + 1 / R3 + 1 / Rn...)
 

Resistors in Series
The total capacitance is equal to the sum of all of the resistors.
RTotal = R1 + R2 + R3 + Rn... 
 

Units

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The base unit of resistance is the ohm (W).
 

Calculator

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Select Calculation Type:
Show all available units

R1 []:

   

R2 []:

 

R3 []:

 

R4 []:

 

R5 []:

 

R6 []:

 

RTotal []:

 

Note! Set unit values prior to calculating.