diff --git a/docs/source/api/adc.rst b/docs/source/api/adc.rst
index 1947fdcf990..7e8265afb8f 100644
--- a/docs/source/api/adc.rst
+++ b/docs/source/api/adc.rst
@@ -48,8 +48,8 @@ This function will return analog value in millivolts.
 analogReadResolution
 ^^^^^^^^^^^^^^^^^^^^
 
-This function is used to set the resolution of ``analogRead`` return value. Default is 12 bits (range from 0 to 4096) 
-for all chips except ESP32S3 where default is 13 bits (range from 0 to 8192). 
+This function is used to set the resolution of ``analogRead`` return value. Default is 12 bits (range from 0 to 4095) 
+for all chips except ESP32S3 where default is 13 bits (range from 0 to 8191). 
 When different resolution is set, the values read will be shifted to match the given resolution.
 
 Range is 1 - 16 .The default value will be used, if this function is not used.
@@ -205,4 +205,4 @@ Here is an example of how to use the ADC.
 .. literalinclude:: ../../../libraries/ESP32/examples/AnalogRead/AnalogRead.ino
     :language: arduino
 
-Or you can run Arduino example 01.Basics -> AnalogReadSerial.
\ No newline at end of file
+Or you can run Arduino example 01.Basics -> AnalogReadSerial.