Resistor Calculator
Series resistances add; parallel resistance is the reciprocal of the sum of reciprocals.
This calculator is free to use. Enable JavaScript to enter your values and see a result instantly.
How it works
Series resistances add; parallel resistance is the reciprocal of the sum of reciprocals.
Worked example
100 Ω and 200 Ω in series total 300 Ω.
Keep in mind
Results are estimates; check the assumptions for your situation.