100 US fl oz to US gal — 100 US fluid ounces in US gallons
Exact 100 ÷ 128 = 0.78125
2 litres 957 millilitres
100 US fluid ounces in other units
| Millilitres | 2,957.35 | mL |
|---|---|---|
| Litres | 2.957353 | L |
| Cubic metres | 0.002957352956 | m³ |
| US teaspoons | 600 | tsp |
| US tablespoons | 200 | tbsp |
| US cups | 12.5 | US cup |
| US pints | 6.25 | US pt |
| US quarts | 3.125 | US qt |
| US gallons | 0.78125 | US gal |
| Imperial fluid ounces | 104.084273 | imp fl oz |
| Imperial pints | 5.204214 | imp pt |
| Imperial gallons | 0.65052671 | imp gal |
| Cubic feet | 0.10443793 | ft³ |
| Cubic inches | 180.46875 | in³ |
| Oil barrels | 0.01860119 | bbl |
US fl oz to US gal at a glance
| US fluid ounces | US gallons |
|---|---|
| 1 US fl oz | 0.0078125 US gal |
| 2 US fl oz | 0.015625 US gal |
| 3 US fl oz | 0.0234375 US gal |
| 5 US fl oz | 0.0390625 US gal |
| 10 US fl oz | 0.078125 US gal |
| 20 US fl oz | 0.15625 US gal |
| 25 US fl oz | 0.1953125 US gal |
| 50 US fl oz | 0.390625 US gal |
| 100 US fl oz | 0.78125 US gal |
| 250 US fl oz | 1.953125 US gal |
| 500 US fl oz | 3.90625 US gal |
| 1,000 US fl oz | 7.8125 US gal |
How to convert US fluid ounces to US gallons
Multiply by 0.0078125 — one US fluid ounce is 0.0078125 US gallons. That factor is exact: it comes from the definition of the units rather than from a measurement, so it will not change and does not need rounding.
Working 100 ÷ 128 = 0.78125
What these units are
The US fluid ounce and the US gallon are covered in the volume unit guide, along with every other unit on this page.
Questions
How many US gallons are in a US fluid ounce?
One US fluid ounce is 0.0078125 US gallons. This figure is exact — it comes from the definition of the unit, not a measurement.
What is 100 US fluid ounces in US gallons?
100 US fluid ounces is 0.78125 US gallons. The working is 100 ÷ 128 = 0.78125.
Is a gallon the same in the US and the UK?
No. A US gallon is 3.785411784 litres; an Imperial gallon is 4.54609 litres. The Imperial one is about 20% larger, which is why US and UK fuel economy figures for the same car look different.
Which pint does a recipe mean?
Follow the recipe's origin. A US pint is 16 US fluid ounces, roughly 473 mL. An Imperial pint is 20 Imperial fluid ounces, roughly 568 mL. A British pint of milk is noticeably more than an American one.
Can I convert litres to kilograms here?
Not directly — that depends on what you are measuring. Volume becomes mass only once you know the density. Water is the convenient case: one litre is almost exactly one kilogram. Oil, flour and alcohol are all lighter.
Why is a US cup not 250 mL?
The US legal cup is 240 mL and the customary cup used in recipes is about 236.6 mL. The round 250 mL cup is the Australian and metric standard. In baking the gap is enough to notice.