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Voltage Divider Calculations

Enter 3 values to get the 4th value:

Our voltage divider calculator is a tool used to determine the output voltage of a voltage divider circuit, a simple circuit consisting of two resistors in series.

The formula for calculating the output voltage (Vout) in a voltage divider is:

V out = V in × R2/R1+R2

Where:

V in is the input voltage.

R1 is the resistance of the first resistor.

R2 is the resistance of the second resistor.

This formula calculates the voltage drop across the second resistor (R2), giving the circuit's output voltage.

Can a voltage divider calculator be used for both DC and AC circuits?

Yes, but with limitations. For DC circuits, it's straightforward. For AC circuits, the calculator only works for resistive elements, not for capacitive or inductive loads, as these introduce phase shifts and frequency-dependent behaviors.

How accurate is a voltage divider calculator?

The accuracy is generally high for ideal resistors in DC circuits. However, real-world factors like resistor tolerance, temperature effects, and load impacts can introduce errors.

Are there limitations to using a voltage divider calculator?

Yes. It assumes ideal resistors and does not account for real-world factors like non-linear loads, frequency-dependent behavior in AC circuits, or the impact of connected loads on the divider.

Can a voltage divider calculator help in designing a circuit?

Yes, it's a useful tool for preliminary design, particularly in determining resistor values for achieving specific voltage levels in a circuit. However, complex designs require more comprehensive analysis.