Calculation
Vout = Vin · R₂/(R₁ + R₂)
Vout = Vin·R₂/(R₁+R₂); a connected load changes the ratio.
Kirchhoffsche Regeln
Voltage divider with two resistors
Vout = Vin·R₂/(R₁+R₂); a connected load changes the ratio.
MINTSI
02
Result
Select a target and calculate.
Understand the inputs
- Output voltage Vout — Tap voltage across R₂ without load.
- Input voltage Vin — Supply voltage across the series pair.
- Upper resistor R₁ — Resistance between Vin and the tap.
- Lower resistor R₂ — Resistance between tap and reference potential.
Example
12 V with 1 kΩ/(1.4 kΩ+1 kΩ) gives 5 V.
Assumptions and limits
Unloaded divider; source and load resistance are excluded.
Sources