Series Resistor Calculator

series resistor

Resistor is a passive electronic component that very commonly seen in electronic circuits. As the name suggests, It is designed to resist/restrict the flow of electric current. Resistor is quantized by its resistance value, measured in ohms (Ω) which comes in various types / sizes / shape.

Even though the primary purpose of adding a resistor within a circuit is to control the flow of current, we can configure resistor in various ways to create a complicated circuit. Which can be used in wide range of applications:

  • DAC – Digital to Analog Converter
  • Voltage Dividers
  • Current Limiters
  • Load Balancing
  • Sensing / Feedback Circuit
  • Biasing semiconductors

When resistors are connected in series, they create a sequential path for the flow of current. So, the total resistance of the resistors in series will be equal to the sum of the individual resistances. Use the below calculator to calculate the series resistance, just by giving the number of resistors in series with their respective resistance values, and this calculator will provide you with the total resistance.

Understanding Series Resistance:

Voltage Distribution: Different criteria apply to the voltage across each resistor linked in series than to the series current. The potential differences across resistors R1, R2, and R3 add up to the total supply voltage across the resistors. With the biggest voltage across the largest resistor, the voltage distribution is proportionate to the resistor values. 

Current: All of the resistors in a series resistor circuit share the same current. The total resistance and the total voltage applied across the circuit determine the same amount of current that flows through each resistor. 

Power: Each resistor in a series circuit uses power in proportion to the voltage across it and its resistance. The sum of the powers used by all of the resistors determines the overall power used by the circuit. 

Example: Consider three resistors, R1 = 10Ω, R2 = 20Ω, and R3 = 30Ω, connected in series. The total or equivalent resistance, RT would be: RT = R1 + R2 + R3 = 10Ω + 20Ω + 30Ω = 60Ω.

Note : Don’t end with comma ( , )

Enter Resistance of All Resistors (E.g: 1,3,2,6,8,9,10,5)


\[ R = R_1 + R_2 + R_3 + R_4 + . . . \]

where :

  • R=Total Resistance
  • R1,R2,R3…=Each Resistance Value

Any questions? Drop them here!