Parallel Voltage Calculator

Calculate voltage, current, and power in parallel circuits. In parallel circuits, voltage is the same across all branches while current divides based on resistance.

Parallel Circuit

                    I1      I2      I3
                    โ†“       โ†“       โ†“
    Vs โ”€โ”€โ”ฌโ”€โ”€โ”€ R1 โ”€โ”€โ”€โ”ฌโ”€โ”€โ”€ R2 โ”€โ”€โ”€โ”ฌโ”€โ”€โ”€ R3 โ”€โ”€โ”€โ”ฌโ”€โ”€โ”€ GND
         โ”‚          โ”‚          โ”‚          โ”‚
         โ”‚          V          V          V
         โ”‚          โ”‚          โ”‚          โ”‚
         โ””โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ดโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”ดโ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”˜
         
    V1 = V2 = V3 = Vs (Same voltage across all branches)
    Itotal = I1 + I2 + I3 (Currents add up)

Supply Voltage

Parallel Branches

About Parallel Circuits

In a parallel circuit, components are connected across common points, creating multiple paths for current flow. Each branch operates independently at the same voltage.

Key Characteristics:

  • Same Voltage: All branches have the same voltage as the source
  • Current Division: Current divides inversely proportional to resistance
  • Independent Operation: Each branch operates independently
  • Lower Total Resistance: Equivalent resistance is always less than the smallest branch resistance

Applications:

  • Household electrical wiring
  • Car headlights and taillights
  • Computer circuits
  • Battery charging systems

Advantages:

  • If one branch fails, others continue to work
  • Each device gets full supply voltage
  • Devices can be controlled independently