MAXScanner electronics calculator
Voltage Divider Calculator — Output, Loaded Divider & Current
Calculate unloaded or loaded voltage-divider output, source current, equivalent lower resistance and resistor/load power from explicit circuit values.
Results
Output 6 V
Divider source current 0.6 mA
R1 power 0.0036 W
R2 power 0.0036 W
Load: open circuit
Effective lower resistance 10,000 Ω
Formula and assumptions
Rlower = R2 || RL; Vout = Vin × Rlower/(R1+Rlower); I = Vin/(R1+Rlower).
12 V with R1=10 kΩ and R2=10 kΩ gives 6 V unloaded.
- DC steady-state resistive network.
- A zero load means no external loading branch.
Frequently asked questions
Why does a load reduce output voltage?
The load sits in parallel with the lower resistor, reducing its equivalent resistance.
Does this include resistor power?
Yes. The runtime reports R1 and R2 power and, when a load is entered, load power.