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〽️ Voltage Divider Calculator
Calculate output voltage or find resistor values for a two-resistor divider.
Find V
out
Find R2
Find Output Voltage
Vin
R1
Vout
R2
Vout = Vin × R2 / (R1 + R2)
Input Voltage (Vin)
R1
R2
⚠ Please enter all three values.
Calculate
Clear
Results
Find R2 for a Target Vout
Vin
R1
Vout
R2
R2 = R1 × Vout / (Vin − Vout)
Input Voltage (Vin)
Target Vout
R1
⚠ Check your values — Vout must be less than Vin.
Calculate
Clear
Results