Rechner

Voltage Divider Calculator

Calculate output voltage, find R1 or R2 for any voltage divider — includes load effects, E24 standard resistor matching, and circuit diagrams

Parameters

10 kΩ

10 kΩ

Output Voltage
6.000 V
Ratio: 50.00% of Vin
R1
10 kΩ
R2
10 kΩ
Current
0.60 mA
Total Power
7.2 mW
Vin = 12VR110 kΩVout6.000VR210 kΩGND

Formulas

Output Voltage
Vout = Vin × R2 / (R1 + R2)
With Load
R2_eff = R2 ∥ R_load = R2×R_L/(R2+R_L)
Current
I = Vin / (R1 + R2_eff)

Common Voltage Divider Configurations

VinVoutR1R2Use Case
5V3.3V5.1 kΩ10 kΩ5V → 3.3V logic level
12V5V14 kΩ10 kΩ12V → 5V ADC reference
12V2.5V38 kΩ10 kΩBattery monitor ADC input
24V3.3V62 kΩ10 kΩ24V industrial → MCU
9V5V8.2 kΩ10 kΩ9V battery → 5V sense

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