Water Bottle Math › 20 oz
How Many 20 oz Water Bottles Are in a Gallon?
The quick answer, a chart for every common water goal, and a calculator for yours.
20 oz6.4 bottlesmake one US gallon (128 fl oz) · about 6½
How many 20 oz bottles for common goals
| Goal | Bottles | In plain words |
|---|---|---|
| a gallon | 6.4 bottles | about 6½ |
| half a gallon | 3.2 bottles | about 3¼ |
| 64 oz | 3.2 bottles | about 3¼ |
| 100 oz | 5 bottles | exactly 5 |
| 2 liters | 3.38 bottles | about 3½ |
| 3 liters | 5.07 bottles | about 5 |
| 8 cups (8 oz each) | 3.2 bottles | about 3¼ |
| 120 oz | 6 bottles | exactly 6 |
Your own goal
How the maths works
Divide your goal in fluid ounces by the bottle size. One US gallon is 128 fl oz and one liter is 33.81 fl oz. Round up if you want to be sure you hit the goal.
Questions
How many 20 oz water bottles make a gallon?
6.4 bottles. A US gallon is 128 fl oz, and 128 ÷ 20 = 6.4.
How many 20 oz bottles are 64 oz?
3.2 bottles.
How much water should I drink a day?
It varies with body size, activity, climate and health. The US National Academies suggest about 3.7 liters of total water a day for men and 2.7 for women, including water from food. Your doctor can advise you.