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Voltage Divider Calculator

Logic & Formula

Splits a source voltage (Vin) into a smaller output (Vout) based on the resistor ratio.

Vout = Vin × R2R1 + R2
Source Input
?
The total voltage provided by your battery or power supply.
V
Resistor 1
Ω
Resistor 2
Ω
Calculated Result

Output Voltage (Vout)

0.00 V
66.6%
0% 25% 50% 75% 100%
Standard Pair Finder (E24)
?
Enter your desired Vout. We'll find the closest resistor pairs from the E24 series (ISO 60063, ±5%).
V

Enter a target voltage to find matching resistor pairs.