Current divider
Calculate, convert and check circuit values in your browser.
Inputs
Results
- I1
- 0.05 A
- I2
- 0.05 A
- Resistance
- 500 Ω
Formula and assumptions
Iₙ = I × (1/Rₙ) / Σ(1/R)
Questions, examples and engineering limits
Calculate branch currents for 2–20 parallel resistors. Verify current conservation and understand why lower resistance draws more current.
Content updated:
How is Current Divider Calculator for Parallel Resistor Branches calculated?
Use Iₙ = Itotal × (1/Rₙ)/Σ(1/R). Calculate branch currents for 2–20 parallel resistors. Verify current conservation and understand why lower resistance draws more current.
Sources: openstax.org [1]
How do I calculate this example: Itotal = 100 mA, R₁ = 1 kΩ, R₂ = 2 kΩ?
I₁ ≈ 66.6667 mA; I₂ ≈ 33.3333 mA. This is a calculated example under the model stated above; it is not a measured component specification.
Which units does Current Divider Calculator for Parallel Resistor Branches use?
A, mA, Ω. Convert prefixes before substituting values; keep the input and output units attached to every number.
Sources: openstax.org [1]
Which parallel branch carries more current?
All branches share voltage. The lower resistance carries more current because I = V/R.
Sources: openstax.org [1]
Should branch currents add to the input current?
Yes, for the modelled node. Small displayed differences can result from rounding each branch separately.
Sources: openstax.org [1]
Can I divide AC current using resistance alone?
Only for resistive branches. With inductors or capacitors, use complex admittances and phase; this tool models positive resistances.
Sources: openstax.org [1]
Answers use the stated model and units. Examples are calculated values, not measurements or component ratings.