Resistor Divider Output CalculatorFree online science calculator — instant results, no sign-up
Find unloaded output voltage of a two-resistor divider.
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About the Resistor Divider Output Calculator
Find unloaded output voltage of a two-resistor divider. Idealized model using the displayed units; not an engineering safety specification. Confirm the assumptions before using measured data. No output loading; at least one resistor must be positive.
- Input voltage
- Enter input voltage in V. Accepted minimum: -1000000.0.
- Top resistor
- Enter top resistor in Ω. Accepted minimum: 0.
- Bottom resistor
- Enter bottom resistor in Ω. Accepted minimum: 0.
Formula and method
Result = voltage * bottom / (top + bottom) [V]
- voltageInput voltage (V)
- topTop resistor (Ω)
- bottomBottom resistor (Ω)
Find unloaded output voltage of a two-resistor divider. Substitute the variables using the units defined above. Idealized model using the displayed units; not an engineering safety specification. Confirm the assumptions before using measured data. No output loading; at least one resistor must be positive.
Worked example
These are the calculator's starting values and the results it actually produces for them.
Inputs
- Input voltage12 V
- Top resistor1000 Ω
- Bottom resistor2000 Ω
Results
- Result8 V
How to use the Resistor Divider Output Calculator
- 1Enter input voltage in V.
- 2Check top resistor, bottom resistor.
- 3Read the V result and compare the stated assumptions with your situation.
Reading your result
Find unloaded output voltage of a two-resistor divider. The displayed quantity is V. A negative value, when the formula permits one, describes the direction of the difference—not a positive gain.
Limitations
Idealized model using the displayed units; not an engineering safety specification. Confirm the assumptions before using measured data. No output loading; at least one resistor must be positive. Numeric results are rounded for display; the calculation does not establish that your chosen inputs represent a realistic or permitted scenario.
Common questions
Which units does Resistor Divider Output require?+
Input voltage: V; Top resistor: Ω; Bottom resistor: Ω. Do not mix incompatible units.
What assumptions matter for Resistor Divider Output?+
Idealized model using the displayed units; not an engineering safety specification. Confirm the assumptions before using measured data. No output loading; at least one resistor must be positive.
How should I check a Resistor Divider Output result?+
Use the formula above with the shown starting inputs and compare the worked example generated from the tool. Check the original measurements and terms before using the figure.
Does the calculator save my information?+
Calculations run in your browser. While signed in, inputs and results are automatically recorded in account history; saving a result creates a separate saved record.
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Results are estimates for informational purposes and are not financial, medical or legal advice.