Current Divider Calculator
How a total current splits between two parallel branches.
What is Current Divider?
When a current reaches two parallel resistances it splits between them in proportion to their conductance, so the smaller resistor carries the larger share. It is the mirror image of the voltage divider and the rule people reverse, which is why the page names which branch carries the most current next to the numbers rather than leaving it to be worked out.
How it works
Each branch's current is the total scaled by the *other* branch's resistance over the sum, so R1 and R2 appear crossed over — that is the whole trick. Both branches sit across the same voltage, which is why the parallel equivalent resistance and the voltage across the pair fall out of the same numbers. The dissipation in each resistor is reported as well, because the branch carrying the most current is the branch running hot.
- Enter your input. Type or paste your input into the field above — the tool responds instantly.
- Review the result. Output updates live as you type. Everything runs entirely in your browser.
- Copy or download. Use the Copy button to grab the result, or Download to save it as a file.
Examples
Realistic sample
Type or paste any realistic input — the tool computes the result locally and instantly.
Common mistakes
Expecting a server round-trip
Nothing is uploaded — every tool in this category runs entirely in your browser.