Voltage Divider Calculator

Use the voltage divider calculator to calculate or check a result with a clear formula and simple explanation.

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Input Voltage (V_in):

Resistor 1:

Resistor 2:

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Output Voltage (V_out):

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How it works

Formula: Vout = Vin × R2 ÷ (R1 + R2)

Check the input values and units before relying on the result, especially when the calculation is used for study or practical work.

Frequently Asked Questions FAQ

What is the Voltage Divider Calculator used for?

The Voltage Divider Calculator helps you work through a common science or engineering calculation using the values you provide.

What formula is used?

The calculation follows the standard relationship shown on this page: Vout = Vin × R2 ÷ (R1 + R2)

What inputs should I check first?

Check every value, unit, and measurement before calculating. A correct formula can still produce a misleading result when the inputs use incompatible units.

Can I use this calculator for study?

Yes. It can be useful for checking examples, homework, lab preparation, and general learning. It is still a good idea to understand the steps behind the result.

Why can rounding affect the answer?

Intermediate rounding can slightly change a final result. Keeping extra precision during the calculation and rounding at the end usually gives a more consistent answer.

Should I verify important results?

Yes. For technical, laboratory, or safety-related work, verify the result against the relevant textbook, specification, measurement method, or qualified professional.

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