Voltage Divider Calculator


Formulas:
  • \( V_{\text{out}} = \frac{R_2}{R_1 + R_2} \times V_{\text{in}} \)
  • \( V_{\text{in}} = V_{\text{out}} \times \frac{R_1 + R_2}{R_2} \)
  • \( R_1 = R_2 \times \left( \frac{V_{\text{in}}}{V_{\text{out}}} - 1 \right) \)
  • \( R_2 = R_1 \times \frac{V_{\text{out}}}{V_{\text{in}} - V_{\text{out}}} \)
  • \( I_{\text{total}} = \frac{V_{\text{in}}}{R_1 + R_2} \)
Where:
  • Vin is the source voltage, measured in volts (V).
  • R1 is the resistance of the 1st resistor, measured in Ohms (Ω).
  • R2 is the resistance of the 2nd resistor, measured in Ohms (Ω).
  • Vout is the output voltage, measured in volts (V).
Voltage Divider Diagram
Result:
Blank
Enter values for any three of the parameters and
click "Calculate" to find the remaining parameter.