Current Divider Calculator

Calculate branch currents in a parallel resistor circuit using the current divider rule.

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Input Values

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Parallel Circuit Diagram

It →I1 ↓R1I2 ↓R2← It

Quick Guide

The Current Divider Rule:

In a parallel circuit, the current splits between branches. The amount of current flowing through any branch is inversely proportional to its resistance. Current takes the path of least resistance.

Key Rules:

  • Total Current (It) = I1 + I2
  • Voltage across all parallel branches is equal (V = I1×R1 = I2×R2)
  • The smaller resistor always carries the larger current
  • If R1 = R2, the current splits equally (I1 = I2 = It/2)