Series and parallel resistor calculator
Build a two-to-ten resistor network and calculate its equivalent resistance.
Formula
Series: Req = R1 + R2 + …
Parallel: 1/Req = 1/R1 + 1/R2 + …
A zero-ohm parallel branch gives zero equivalent resistance. Example: 1 kΩ + 2 kΩ = 3 kΩ; 1 kΩ || 2 kΩ ≈ 666.667 Ω. All tools