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Parallel Resistor Calculator

R(total) = 1/(R1 + R2 + R3 + ... + Rn)

This calculator can determine the resistance of up to 10 resistors in parallel. Enter resistances into the boxes below and when all values have been input, click on the Calculate button and the result will appear in the box below that button.

As a test, if you input resistances of 3, 9 and 18 ohms, your answer should be 2 ohms.

 
Answer:
For easier readibility, numbers between .001 and 1,000 will not be in scientific notation but will still have the same precision.










 
IMPORTANT:If you have more values to input, click the Reset button (manually clearing the boxes does NOT reset stored values).

This calculator will also solve other math problems. Calculating resistors in parallel is exactly the same as the calculations required for inductors in parallel or for capacitors in series.

 

 
 

 

 
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