Voltage divider
Voltage divider: use voltage, upper resistor r₁, lower resistor r₂. Review the formula, worked example and calculation steps.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
Vout = Vin × R₂/(R₁+R₂)
Variables & units
- Voltage
- V · minimum 0.000001, maximum 1000000000000
- Upper resistor R₁
- Ω · minimum 0, maximum 1000000000000
- Lower resistor R₂
- Ω · minimum 0.000001, maximum 1000000000000
Worked example
Change the supplied example values to match your circuit.
Assumptions
Ideal unloaded resistive divider. Loading and tolerances affect the actual voltage.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
Use the default input values to find the answer. The reset icon restores those values.
Calculated on your device. Your latest 100 calculations stay in this browser.