Resistors In Series
Add up to 10 resistors and instantly get total resistance, current draw, and voltage drop across each resistor.
Resistor Values
Enter to calculate current and voltage drops.
Results
Total Resistance
—
Ω
Current
—
mA
Power (total)
—
mW
Voltage Drops
| Resistor | Value (Ω) | Share (%) | Voltage Drop (V) |
|---|
Add at least one resistor to see results.
Summary
Add up to 10 resistors and instantly get total resistance, current draw, and voltage drop across each resistor.
How it works
- Enter resistance values (in ohms) for each resistor — add up to 10.
- The tool sums all values: R_total = R1 + R2 + ... + Rn.
- Optionally enter a supply voltage to calculate circuit current (I = V / R_total).
- Voltage drop across each resistor is computed as V_n = I × R_n.
- Results update instantly as you type.
Use cases
- Verify a resistor ladder design before breadboarding.
- Calculate current limiting resistors for LED strings.
- Check voltage divider ratios for sensor bias circuits.
- Quickly sum resistor values when exact parts are unavailable.
- Teach or demonstrate series-circuit fundamentals.
Frequently Asked Questions
Last updated: 2026-06-11 ·
Reviewed by Nham Vu