How to convert US fluid ounces to litres
One US fluid ounce equals 0.029574 litres, so multiply the number of US fluid ounces by 0.029574:
L = US fl oz × 0.029574
US fl oz = L ÷ 0.029574 (1 L = 33.814 US fl oz)
Example: 12 US fl oz → 12 × 0.029574 = 0.354882 L.
Going the other way, divide by 0.029574, or multiply by 33.814; the litres to US fluid ounces converter does it for you.
Everyday values
| US fluid ounces | Litres | For example |
|---|---|---|
| 12 US fl oz | 0.354882 L | a soda can |
| 16.9 US fl oz | 0.499793 L | a 500 ml bottle |
| 33.8 US fl oz | 0.999585 L | one litre |
| 64 US fl oz | 1.8927 L | half a gallon |
| 128 US fl oz | 3.7854 L | one US gallon |
When you need this conversion
Divide US fluid ounces by 33.814 to get litres. Large drink containers in the US are labelled in fluid ounces, gallons or both.
US fluid ounce to litre conversion table
| US fl oz | L | US fl oz | L |
|---|---|---|---|
| 4 US fl oz | 0.118294 L | 44 US fl oz | 1.3012 L |
| 8 US fl oz | 0.236588 L | 48 US fl oz | 1.4195 L |
| 12 US fl oz | 0.354882 L | 52 US fl oz | 1.5378 L |
| 16 US fl oz | 0.473176 L | 56 US fl oz | 1.6561 L |
| 20 US fl oz | 0.591471 L | 60 US fl oz | 1.7744 L |
| 24 US fl oz | 0.709765 L | 64 US fl oz | 1.8927 L |
| 28 US fl oz | 0.828059 L | 68 US fl oz | 2.011 L |
| 32 US fl oz | 0.946353 L | 72 US fl oz | 2.1293 L |
| 36 US fl oz | 1.0647 L | 76 US fl oz | 2.2476 L |
| 40 US fl oz | 1.1829 L | 80 US fl oz | 2.3659 L |
About the units
- US fluid ounce (US fl oz): 1/128 of a US gallon, about 29.57 millilitres.
- Litre (L): one cubic decimetre (1,000 cm³).
Both are units of volume. The conversion factor comes from the exact definitions above, so the calculator is exact; results are only rounded for display (up to six significant digits).
Frequently asked questions
How many litres are in one US fluid ounce?
One US fluid ounce is 0.029574 litres. One litre is 33.814 US fluid ounces.
How do I convert US fluid ounces to litres?
Multiply the value in US fluid ounces by 0.029574. To go back, divide by 0.029574.
What is 12 US fl oz in litres?
12 US fl oz = 0.354882 L.
What is 16.9 US fl oz in litres?
16.9 US fl oz = 0.499793 L.
Sources
- NIST Special Publication 811 (2008), Guide for the Use of the International System of Units (SI), Appendix B: conversion factors.
- NIST Handbook 44 (2024), Appendix C: General tables of units of measurement.
Last reviewed 5 October 2026. Results are estimates; see our disclaimer.