Series Resistance Calculator Formula
Understand the math behind the series resistance calculator. Each variable explained with a worked example.
Formulas Used
Total Resistance
total_resistance = r1 + r2 + r3Variables
| Variable | Description | Default |
|---|---|---|
r1 | Resistor 1(Ω) | 100 |
r2 | Resistor 2(Ω) | 220 |
r3 | Resistor 3 (0 if unused)(Ω) | 330 |
How It Works
Series Resistance
Resistors in series carry the same current, and their resistances add directly.
Formula
R_total = R1 + R2 + R3 + ...
The total resistance is always greater than the largest individual resistor.
Worked Example
Three resistors in series: 100, 220, and 330 ohms.
r1 = 100r2 = 220r3 = 330
- 01R_total = R1 + R2 + R3
- 02R_total = 100 + 220 + 330
- 03R_total = 650 Ω
Ready to run the numbers?
Open Series Resistance Calculator