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Series/Parallel Resistors

FREE

Circuit Resistance Calculator

Basic

Resistor Values

R1:Ω
R2:Ω
R3:Ω

Quick Presets:

Circuit Diagram

R1R2R3

Calculation Result

Total Series Resistance

650.00 Ω
Rt = R1 + R2 + R3 + ...

Calculation Steps

Series Configuration: Rt = R1 + R2 + R3 + ...

Rt = 100 + 220 + 330

Rt = 650.000 Ω

Series vs Parallel

Series Connection:
R_total = R₁ + R₂ + R₃ + ...
  • • Same current through all resistors
  • • Voltage divides across resistors
  • • Total resistance increases
Parallel Connection:
1/R_total = 1/R₁ + 1/R₂ + ...
  • • Same voltage across all resistors
  • • Current divides between resistors
  • • Total resistance decreases