Parallel Resistance Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the two resistor values.
- Press Calculate.
How it works
Two resistors in parallel = (R1 × R2) ÷ (R1 + R2). The total is always less than the smaller one.
Worked example
4 Ω and 4 Ω. = 2 Ω.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.