Resistive Divider Output Voltage
Use this resistive divider output voltage tool when you have measured values for vin, r top, r bottom. It applies a transparent mathematical relationship to those values to return an answer in V. Unlike a prediction or recommendation, this is a calculation from your inputs. Assumes the output is unloaded. Enter a different scenario to see how this particular quantity changes; check the assumptions before using it in a project.
How to use this calculator
- Use exact measurements and consistent units for vin, r top, r bottom.
- Enter each quantity; blank, nonnumeric and out-of-range inputs are not accepted.
- Compare the reported V quantity against your own data and the limitations below.
Formula for Resistive Divider Output Voltage
V = vin*r_bottom/(r_top+r_bottom). Inputs are expressed in the units shown by the labels.
- This uses a direct electrical relationship and does not retrieve remote data, forecasts or individual account information.
- Assumes the output is unloaded.
Worked examples
Worked example — Resistive Divider Output Voltage
Enter Vin = 12, R top = 10000, R bottom = 4700.
Apply vin*r_bottom/(r_top+r_bottom).
Calculated value: approximately 3.836735 V.
Understanding the result
The example produces about 3.836735 V; this is a mathematical output for the example inputs, not an observed result for your project.
Assumes the output is unloaded.
Important notes
Assumes the output is unloaded.
Use values from the same measurement period or physical system. The result is in V and is not a guarantee of capacity, safety, ranking or revenue.
Frequently asked questions
What does Resistive Divider Output Voltage calculate?
It converts vin, r top, r bottom into a quantity measured in V using the stated formula.
Which assumption matters most?
Assumes the output is unloaded.
How can I check this output?
Recalculate the worked example from the input quantities, confirm units and compare with direct measurements where available. This calculator does not fetch live data.
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Related explanations
Learn the method behind the number or compare the terminology before using the calculator.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.