Voltage Divider Calculator
Calculate output voltage, or find R1/R2 values for a target output.
// Vout = Vin × R2 / (R1 + R2) — choose what to solve for
▸ show formulas
Vout = Vin × R2 / (R1 + R2)
R2 = R1 × Vout / (Vin − Vout)
R1 = R2 × (Vin − Vout) / Vout
R2 = R1 × Vout / (Vin − Vout)
R1 = R2 × (Vin − Vout) / Vout
voltage dividerR1R2Voutbias