Four resistors in parallel calculator

R1 Ω
R2 Ω
R3 Ω
R4 Ω
PT Ω

This tool provides you with the parallel resistor calculator formula, the parallel resistor calculator online tool.

Parallel resistor calculator formula The parallel resistor calculator online calculator can calculate the resistance of 2 to 4 resistors in parallel. The units should be kept consistent in the parallel resistor calculation formula.

Two typical applications of parallel resistors:

1. No suitable resistor: When you can’t find a resistor with a suitable resistance, you can get it by connecting multiple resistors in parallel.

2. The power of the resistor does not meet the requirements: For example, if a 1W 25Ω resistor is needed in the circuit, but it is not available, you can use four 1/2W 100Ω resistors in parallel to replace it. Considering the uniform power distribution, the resistance values of the four resistors should be as consistent as possible.