Potassium in Banana Calculator Potassium in Bananas Bananas Needed for Potassium How much potassium in Bananas? Small Size Banana (~101g) Medium Size Banana (~118g) Large Size Banana (~136g) Cup, sliced (~150g) Custom Weight of Banana (Gram) Calculate Amount of Potassium How Many Bananas Are Needed for a Specific Amount of Potassium? milligram Calculate Amount of Banana The main purpose of this converter is to convert the total amount of potassium in a banana and vice versa. Know how much potassium a banana contains. Leave a Comment Cancel replyCommentName Email Save my name, email, and website in this browser for the next time I comment.