📊 ESP32 ADC Voltage Calculator
Convert ESP32 ADC raw values (0–4095) to voltage with attenuation support.
1.650
Volts (V)
Max Voltage
3.300 V
Step Size
0.806 mV
Raw Value
2048
Resolution
12-bit
💡 ESP32 ADC Formula:
Attenuation Reference:
ADC_0db = 1.1V max · ADC_2_5db = 1.5V max · ADC_6db = 2.2V max · ADC_11db = 3.3V max
Voltage = (RawADC × MaxVoltage) / MaxRawAttenuation Reference:
ADC_0db = 1.1V max · ADC_2_5db = 1.5V max · ADC_6db = 2.2V max · ADC_11db = 3.3V max
Quick Reference Table
| Raw Value | ADC_0db (1.1V) | ADC_2_5db (1.5V) | ADC_6db (2.2V) | ADC_11db (3.3V) |
|---|
📖 Learn more about ESP32 ADC pins, ADC1 vs ADC2, and Wi-Fi conflicts.
Interactive Pinout Tool