Output voltage
Vout = Vin x R2 / (R1 + R2)
Electrical calculator
Voltage Divider Calculator
Find Vout using Vin, R1, and R2.
Calculator
Enter values
Results update automatically as you type.
Result
About this calculator
How it works
A voltage divider uses two resistors in series to produce a fraction of the input voltage at the midpoint.
Formulas
Formulas used
Divider current
I = Vin / (R1 + R2)
Guide
How to use this calculator
- Choose the mode or component type if the calculator provides one.
- Enter known values and select the units beside each input.
- Read the highlighted result first, then use the table for supporting calculated values.
Reference
What the results mean
Output voltage
The divided voltage at the midpoint of the two resistors.
Divider current
The current through the resistor chain.
FAQ
Voltage Divider Calculator questions
Can I use different units?
Yes. Select the unit beside each input. The calculator converts values internally before solving.
Are the results suitable for final design?
Use results for education, screening, and early design checks. Verify final work against standards, datasheets, and project requirements.
Why does the result update automatically?
The calculator listens for input changes and recalculates as soon as enough valid values are available.
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