File:Ink Saver Main Charger Splatling Chart.png

Formula
B = % change due to Ink Saver (Main) = / (200 / 3)

C = ink consumption per full charge = [base consumption] &times; (1 &minus; B)

Number of full charges = 100 / C

Round the final result down to a whole number, because there is never a fraction of a shot.