Resistors in Parallel Calculator
Enter 2–8 resistor values and instantly get total equivalent resistance, current draw, and current through each resistor.
Resistor Values
Enter to calculate total and branch currents.
Results
Equivalent R
—
Ω
Total Current
—
mA
Total Power
—
mW
Branch Currents
| Resistor | Value (Ω) | Current (mA) | Power (mW) |
|---|
Add at least two resistors to see results.
Summary
Enter 2–8 resistor values and instantly get total equivalent resistance, current draw, and current through each resistor.
How it works
- Enter resistance values (in ohms) for each resistor — add 2 to 8 resistors.
- The tool computes 1/R_total = 1/R1 + 1/R2 + ... + 1/Rn, then inverts to get R_total.
- Optionally enter a supply voltage to calculate total current (I = V / R_total).
- Branch current through each resistor is I_n = V / R_n (same voltage across all branches).
- Results update instantly as you type.
Use cases
- Find the equivalent resistance of a parallel resistor bank in a circuit.
- Calculate branch currents when a known voltage is applied across a parallel network.
- Verify that a parallel combination meets a target resistance requirement.
- Quickly check power dissipation across individual resistors.
- Teach or demonstrate parallel-circuit fundamentals.
Frequently Asked Questions
Last updated: 2026-06-11 ·
Reviewed by Nham Vu