Electrical Engineering
Resistance Calculator
⚡ Series & Parallel
Calculate total resistance in series, parallel, and combined circuits.
Circuit Configuration
Circuit Type
Series: R_total = R₁ + R₂ + ... | Parallel: 1/R_total = 1/R₁ + 1/R₂ + ...
Resistor Values
R₁
Ω
First resistor value
R₂
Ω
Second resistor value
R₃
Ω
Third resistor value
R₄
Ω
Fourth resistor value (optional)
R₅
Ω
Fifth resistor value (optional)
Total
0Ω
Total Resistance
0 Ω
series
R₁
0 Ω
R₂
0 Ω
R₃
0 Ω
R₄ / R₅
0 Ω
📊 Detailed Breakdown
| Resistor | Value | Contribution |
|---|
How the formula works
Series: R_total = R₁ + R₂ + R₃ + R₄ + R₅
- Series Circuit: R_total = R₁ + R₂ + R₃ + R₄ + R₅
- Parallel Circuit: 1/R_total = 1/R₁ + 1/R₂ + 1/R₃ + 1/R₄ + 1/R₅
- Combined Circuit: R_total = R₁ + (1/(1/R₂ + 1/R₃)) + (1/(1/R₄ + 1/R₅))
- Enter resistor values in ohms (Ω)
- Values of 0 are ignored in calculations