Four 20 Ω Resistors in Parallel
Four equal 20 Ω resistors wired in parallel yield 5 Ω.
How to use this tool
- Enter resistor r₁, resistor r₂, resistor r₃ (optional) and resistor r₄ (optional) in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your parallel resistance and the full breakdown beneath it.
Four identical resistors in parallel always give one quarter of the individual resistance value.
Frequently asked questions
- Why is parallel resistance always less than any individual resistor?
- Adding a parallel path gives current more routes to flow, increasing total conductance (1/R). Higher conductance = lower resistance.
- What is the formula for exactly two resistors in parallel?
- R = R₁ × R₂ / (R₁ + R₂). Quick shortcut: two equal 10 Ω resistors in parallel give 5 Ω.