This question already has an answer here:
I am trying to calculate EVI from sentinel2 image using ArcMap and I used the following equation
(2.5* (NIR/10000-red/10000))/(NIR/10000+(6*red/10000)- (7.5*blue/10000)+1)
but I get very weird result and not ranging from -1 to +1.
Can anyone help me on this issue?