Physics Formula
Voltage Divider Formula Formula
Calculates output voltage across a resistor in a voltage divider circuit.
Formula Summary
Voltage Divider Formula
Calculates output voltage across a resistor in a voltage divider circuit.
- Category
- Physics
- Equation
- Vout = Vin × R₂ / (R₁ + R₂)
- Calculator
- Use Voltage Divider Formula Calculator →
Equation
Vout = Vin × R₂ / (R₁ + R₂)
Variables
- Vout = output voltage
- Vin = input voltage
- R₁ = first resistance
- R₂ = second resistance
Units
- Voltage: volts (V)
- Resistance: ohms (Ω)
When To Use This Formula
Use this formula when calculating the output voltage across a resistor in a series voltage divider circuit.
Rearranged Equations
- R₂ = Vout × R₁ / (Vin - Vout)
- Vin = Vout × (R₁ + R₂) / R₂
How to Use This Formula
- Identify the known values from the problem statement.
- Convert all values into compatible units.
- Substitute the values into the equation and calculate the result.
- Check that the final answer has the correct unit and meaning.