In order to calculate the total daily bather load the following formula should be used:

25 to 50% of instantaneous bather load x 12

Example (instantaneous bather load of 110):

27.5 x 12 = 330

55 x 12 = 660

daily bathing load: 330 to 660

Pool operators should only go to the upper end of this range if they are confident that the pool plant system can handle it and maintain good water quality. If in doubt, the advice would be to stay in the bottom half of the range.