What is current divider?

In parallel resistors, total current divides inversely proportional to resistance. Lower resistance gets more current. Formula: I1 = Itotal × R2/(R1+R2).

How does current split in parallel?

Current takes path of least resistance. Branch current I = Itotal × Req_other / (R + Req_other), where Req_other is equivalent of all other parallel paths.

Why does lower resistance get more current?

Lower resistance provides easier path. By Ohm's law, I = V/R; same voltage across all branches, so lower R = higher I.

How do I apply current divider with 3+ resistors?

Find equivalent of all other parallel resistors, then use two-resistor formula. Repeat for each branch.

Is voltage same across parallel resistors?

Yes. Voltage is identical across all parallel branches. Current adjusts based on resistance.

Engineering

Current Divider Calculator

Calculate branch current in parallel resistor circuits using current divider rule.

Total Current (A)

R1 (Ω)

R2 (Ω)

Branch Currents

I1—

I2—

Voltage across branches—

Frequently Asked Questions

In parallel resistors, total current divides inversely proportional to resistance. Lower resistance gets more current. Formula: I1 = Itotal × R2/(R1+R2).
Current takes path of least resistance. Branch current I = Itotal × Req_other / (R + Req_other), where Req_other is equivalent of all other parallel paths.
Lower resistance provides easier path. By Ohm's law, I = V/R; same voltage across all branches, so lower R = higher I.
Find equivalent of all other parallel resistors, then use two-resistor formula. Repeat for each branch.
Yes. Voltage is identical across all parallel branches. Current adjusts based on resistance.