This is an addon for Blender that let's you calculate the amount of time needed to render an entire animation.
You have to input the time it takes to render 1 frame or 3 in advanced mode and the addon will calculate the time needed.
Features:
-Simple mode: Only one input, less accurate output
-Advanced mode: Multiple inputs, more accurate output
-Shows total time
-Shows remainig frames
-Shows remaining time
-Shows the estimated finishing time
-Shows progression