Daily Fluid Intake Total

How it is calculated

This is a straight sum of three fields, all in millilitres: total = water + coffee/tea + other drinks. The millilitre total is rounded to a whole number and the litre figure is total ÷ 1000, rounded to two decimals. A field left empty counts as nothing, so you can fill in only one or two; the tool gives no result only when all three are empty. A negative amount in any field gives no result. There is no conversion of ounces or cups and no weighting of drinks: a mL of coffee, soup or juice counts the same as a mL of water. The tool does not compare the total with any target, so you judge it against your own goal.

Common mistakes

• Entering cups, glasses or fluid ounces as if they were millilitres. A 250 mL cup entered as 1 adds almost nothing.
• Counting the same drink twice, for example putting a tea into both the coffee/tea and other fields.
• Forgetting water from food, such as soup or fruit, which the tool only counts if you add its volume yourself in the other field.
• Entering the litre value in a millilitre field: 2 means 2 mL, so type 2000 for two litres.
• Reading a high total as automatically healthy. A very large number can also come from a typing slip, and alcohol or sugary drinks count the same as water here.