How many water bottles is a gallon?
One US gallon fills four 32 oz bottles, eight 16 oz bottles, or about 7.57 bottles of 16.9 oz. It depends on your bottle size鈥攁nd whether you mean a US or Imperial gallon.
Convert gallons to your bottle size
1 US gallon is about 7.57 bottles of 16.9 US fl oz: 7 full bottles plus about 286.9 ml in another.
Partial bottles are rounded for display. Use the capacity printed on your bottle. This is a volume conversion, not a daily drinking target.
One gallon in common water bottle sizes
A US gallon is exactly 128 US fluid ounces (3,785.411784 ml). An Imperial gallon is 4,546.09 ml, so it needs more bottles of the same size.
| Capacity | US gallon | Imperial gallon |
|---|---|---|
| 500 ml | 7.57 | 9.09 |
| 16.9 US fl oz | 7.57 | 9.1 |
| 20 US fl oz | 6.4 | 7.69 |
| 24 US fl oz | 5.33 | 6.41 |
| 32 US fl oz | 4 | 4.8 |
| 40 US fl oz | 3.2 | 3.84 |
| 64 US fl oz | 2 | 2.4 |
| 128 US fl oz | 1 | 1.2 |
Do you need seven or eight 16.9 oz bottles?
Seven full bottles hold 118.3 US fl oz, leaving 9.7 US fl oz to reach a US gallon. You need part of an eighth bottle. Eight full bottles hold 135.2 US fl oz, which is 7.2 US fl oz more than a gallon.
If you are buying sealed bottles to have at least a gallon available, buy eight. If you are measuring exactly a gallon, use seven plus the remaining amount. The converter separates full bottles from the remainder.
How many 500 ml bottles make a gallon?
A US gallon is about 7.57 bottles of 500 ml: seven full bottles plus 285.4 ml. An Imperial gallon is about 9.09 bottles: nine full bottles plus 46.1 ml. A bottle labeled 16.9 US fl oz is close to 500 ml, but the rounded labels are not identical.
How to calculate it yourself
Bottle equivalents = gallon volume 梅 bottle capacity, with both expressed in the same unit. For a 24 US fl oz bottle and a US gallon: 128 梅 24 = 5.33 bottles, or five full bottles plus 8 US fl oz.
Does a gallon mean a daily water target?
No. This page measures volume. For the separate question of intake, read daily water references and their limits. Do not turn a container size into a personal prescription.
Compare other amounts
- 2 liters in bottles
- Water bottle sizes: ml, liters and US ounces
- Daily references and bottle converter
Conversion reference: NIST Guide to the SI, conversion factors. Calculations use fixed volume conversions; displayed values are rounded.