What is the Voltage Divider Calculator?
The voltage divider calculator is a free online tool that helps you work out voltage divider quickly and accurately. It uses the standard formula Vout = Vin x R2 / (R1 + R2) and shows the result instantly as you type, along with a full breakdown so you can see exactly how the answer was reached.
How to use this calculator
- Enter the input voltage.
- Enter R1 and R2.
- See the output voltage.
Formula used
Vout = Vin x R2 / (R1 + R2)Explanation of each input
- Input voltage (V) โ the input voltage used in the calculation.
- R1 (ohm) โ the r1 used in the calculation.
- R2 (ohm) โ the r2 used in the calculation.
Understanding your result
- Output voltage โ the calculated output voltage in V.
Step-by-step calculation
For the example values 12V, R1 1k, R2 2k:
- Apply the formula:
Vout = Vin x R2 / (R1 + R2) - Substitute the values: 12x2000/3000
- Result: 8 V
Worked example
| Inputs | 12V, R1 1k, R2 2k |
|---|---|
| Working | 12x2000/3000 |
| Result | 8 V |
Benefits and practical uses
This calculator saves you time and reduces errors when you need voltage divider. It is useful for students, professionals and anyone who wants a fast, reliable answer without manual calculation. Results update instantly, work in your browser and can be copied or shared in one click.
Assumptions and limitations
- No load current drawn from the output.
Frequently asked questions
What is a voltage divider?
Two series resistors that split an input voltage into a smaller output.
Disclaimer: Results are provided for general information. Please verify important figures independently.