Fluid Ounces to Litres Converter
Convert US fluid ounces to litres — 33.814 fl oz make one litre. Results update as you type; exact factors shown.
One US fluid ounce is 0.0296 litres — see the exact factor, not a rounded rule of thumb.
How the fluid ounces to litres converter works
Volumes convert through the litre (exactly 1 dm³). The US gallon is exactly 3.785411784 L (231 cubic inches); the imperial gallon is exactly 4.54609 L. A US fluid ounce is 29.5735 mL, an imperial fluid ounce 28.4131 mL; a US pint is 16 US fl oz, an imperial pint 20 imperial fl oz.
Australia is fully metric under the National Measurement Act 1960; imperial units appear only in trade with the US and in older documents.
Common volume conversions
| From | To | Units |
|---|---|---|
| 8 US fl oz | 0.2366 L | US fluid ounces to litres |
| 12 US fl oz | 0.3549 L | US fluid ounces to litres |
| 16 US fl oz | 0.4732 L | US fluid ounces to litres |
| 16.9 US fl oz | 0.4998 L | US fluid ounces to litres |
| 20 US fl oz | 0.5915 L | US fluid ounces to litres |
| 24 US fl oz | 0.7098 L | US fluid ounces to litres |
| 32 US fl oz | 0.9464 L | US fluid ounces to litres |
| 33.814 US fl oz | 1 L | US fluid ounces to litres |
| 40 US fl oz | 1.1829 L | US fluid ounces to litres |
| 64 US fl oz | 1.8927 L | US fluid ounces to litres |
| 100 US fl oz | 2.9574 L | US fluid ounces to litres |
| 128 US fl oz | 3.7854 L | US fluid ounces to litres |
Units in this converter and their exact factors
| Unit | Symbol | One unit in litres |
|---|---|---|
| millilitre | mL | 0.001 litre |
| litre | L | 1 litre |
| cubic metre | m³ | 1,000 litre |
| teaspoon (metric) | tsp | 0.005 litre |
| tablespoon (metric) | tbsp | 0.015 litre |
| cup (metric) | cup | 0.25 litre |
| US fluid ounce | US fl oz | 0.0295735296 litre |
| US cup | US cup | 0.2365882365 litre |
| US pint | US pt | 0.473176473 litre |
| US gallon | US gal | 3.785411784 litre |
| imperial fluid ounce | imp fl oz | 0.0284130625 litre |
| imperial pint | imp pt | 0.56826125 litre |
| imperial gallon | imp gal | 4.54609 litre |
| cubic foot | ft³ | 28.316846592 litre |
FAQFrequently asked questions about volume conversion
How many litres is 16.9 fl oz?
Half a litre — the standard bottled-water size.
How many fl oz in a litre?
33.814 US.
What is 128 fl oz?
One US gallon, which is 3.785 litres.
Which fluid ounce is this?
The US customary one, 29.574 mL.
How do I convert quickly?
Divide by about 34, or by 30 for a rough millilitre count.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Measurement Institute (NMI) — Australia's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.