Series Circuit Calculator
Calculate total resistance, current, and voltage drops in a series circuit with up to three resistors.
V
Ω
Ω
Ω
Total Resistance
600.00 Ω
Circuit Current0.0200 A
Voltage across R12.000 V
Voltage across R24.000 V
Voltage across R36.000 V
Total Resistance vs Supply Voltage
Series Circuit Analysis
In a series circuit every component carries the same current. Resistances add directly.
Formulas
R_total = R1 + R2 + R3
I = V / R_total
V_Rn = I x Rn
The sum of all voltage drops equals the supply voltage (Kirchhoff's Voltage Law).
Example Calculation
12 V supply with 100, 200, 300 ohm resistors in series.
- 01R_total = 100 + 200 + 300 = 600 ohms
- 02I = 12 / 600 = 0.02 A
- 03V_R1 = 0.02 x 100 = 2.0 V
- 04V_R2 = 0.02 x 200 = 4.0 V
- 05V_R3 = 0.02 x 300 = 6.0 V
- 06Check: 2 + 4 + 6 = 12 V
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Ohm's Law Guide
A complete guide to Ohm's Law. Learn the relationship between voltage, current, and resistance, with practical examples, the power triangle, and circuit analysis tips.