Voltage Divider Calculator
UNLOADED CIRCUIT ANALYSIS
Vin
R1
Vout
R2
Parameters
V
Output Voltage
4.00 V
Voltage Drop R1 8.00 V
Total Resistance (Rt) 15 kΩ
Attenuation Ratio 0.333
Vout = Vin × [ R2 / (R1 + R2) ]
12 × [ 5 / (10 + 5) ] = 4 V
Common Divider Rules
Ratio Shortcuts
Condition
Vout Result
R1 = R2
Vin ÷ 2
R1 = 2 × R2
Vin ÷ 3
R1 = 3 × R2
Vin ÷ 4
R1 = 9 × R2
Vin ÷ 10