average amount of h2o per day
Calculate the Amount of Water You Use in a Day The average person uses between 80 to 100 gallons of water per day. You may be thinking, âThere is no way I use that much water.â Try calculating the amount of water you use in one day!Use the chart titled Water Usage Chart.ivide that number by 7 (because there are 7 days in a week) to find the average amount of water used per day. Not all activities that use water are listed. If you use water in an activity that is not listed, try to measure the amount of water you used or make an estimate of the amount.