Voltage Divider Calculator Online - Indiafix

VOLTAGE DIVIDER TOOL

Voltage Divider Calculator

Input Voltage (V_in): V mV kV

Resistor 1 (R₁): Ω kΩ MΩ

Resistor 2 (R₂): Ω kΩ MΩ

Output Voltage (V_out): V mV kV

Results:

Additional Parameters:

Tolerance Analysis:

% %

✅ Standard Voltage Divider Formula

When two resistors $R_1$ and $R_2$ are connected in series across a voltage source $V_{in}$, the voltage across $R_2$ (called $V_{out}$) is:

$$V_{out} = V_{in} \times \frac{R_2}{R_1 + R_2}$$

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📘 Explanation:

1. $V_{in}$: Input voltage applied across both resistors.

2. $R_1$: Resistor connected to the input side.

3. $R_2$: Resistor connected to ground (or output side).

4. $V_{out}$: Voltage measured across $R_2$ — this is the divided voltage.

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🔄 Rearranged Forms (if you're solving for other variables):

1. To find $V_{in}$:

   $$V_{in} = V_{out} \times \frac{R_1 + R_2}{R_2}$$

2. To find $R_1$:

   $$R_1 = \left( \frac{V_{in}}{V_{out}} - 1 \right) \times R_2$$

3. To find $R_2$:

   $$R_2 = \frac{V_{out} \times R_1}{V_{in} - V_{out}}$$