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Ohm's Law Calculator

Ohm's Law describes the electrical behavior of conductors and insulation so it's often used in cable testing. This calculator is designed to help you learn more about the interaction of voltage, current, and resistance.

Ohm's Law describes one possible relationship between voltage and current. The law is written mathmatically as:

    V = I * R,     I = V / R,     or     R = V / I.

Where V is voltage, I is current, and R is resistance. Ohm's Law says the voltage across a resistance is proportional to the current flowing through that resistance.

On this calculator you:
    1) Enter any two of three values (V, I, and R),
    2) Click "Calculate",
    3) The third value will be displayed in the Ohm's Law Calculation Result section.

Other Calculator Pages:


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Soople's Calculator Page

Ohm's Law Calculator for HV Testing

Ohm's Law Calculator -- Javascript is required

  
Voltage   (V)

V = I x R

 
 
Current   (I)

I = V / R


Resistance   (R)

R = V / I

 

Ohm's Law Calculation Result:
    ____ will cause
    ____ to flow through
    ____
    (The power dissapated in the resistance is ____)

     
 Calculations you've done so far:

Note: This general purpose calculator can generate combinations of voltage and current that are not practical in normal cable testing applications. If the calculation shows voltages or currents that are out of the specified range for a cable tester then you know the tester doesn't measure the resistance with the current or voltage you've selected. Don't Panic.

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