# Current Divider Rule

**URL:** <https://forumautomation.com/t/current-divider-rule/14510>\
**Category:** Electrical\
**Tags:** basic\
**Created:** [October 16, 2026, 12:07pm UTC](https://forumautomation.com/t/current-divider-rule/14510 "2026-10-16T12:07:06Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Rabert](https://forumautomation.com/user_avatar/forumautomation.com/rabert/32/6784_2.png) [@Rabert](https://forumautomation.com/u/Rabert)\
**Post date:** [October 16, 2026, 12:07pm UTC](https://forumautomation.com/t/current-divider-rule/14510/1 "2026-10-16T12:07:06Z")

</div>

## Current Divider Rule

The **[Current Divider Rule](https://forumelectrical.com/current-divider-calculator/)** is used to calculate how the total current is distributed among parallel branches.

In a parallel circuit, the voltage across each branch remains the same, while the current divides inversely according to the branch resistance. A branch with lower resistance carries more current, whereas a branch with higher resistance carries less current.

 ![1](https://cdn.forumautomation.com/original/2X/9/9a7216513d9a3aa2c54d4cb59845245fc7e85542.jpeg)

Formula:

I₁ = Iₛ × R₂ / (R₁ + R₂)

I₂ = Iₛ × R₁ / (R₁ + R₂)

Where:

- Iₛ = Total supply current
- I₁, I₂ = Branch currents
- R₁, R₂ = Resistance values

Total Current:

Iₛ = I₁ + I₂