A liter is one cubic decimeter.
Liters to Fluid ounces Converter — L to fl oz
Convert Liter (L) to Fluid ounce (fl oz) using the exact conversion factor (1 liter = 33.8140227 fluid ounce). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Liters to Fluid ounces converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
A US fluid ounce is 1/128 of a US gallon.
Result = input x 0.001 / 2.95735296e-5.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Liters to Fluid ounces
Liter and Fluid ounce appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Liter is typically associated with standard volume unit for liquids worldwide, including in the US for beverages and fuel labeling in some contexts, while Fluid ounce is typically associated with united States (beverage, nutrition labeling).
Formula
fluid ounces = liters × 33.8140227018
This factor comes from each unit's defined relationship to the category's base unit: 1 liter equals 0.001 base units, and 1 fluid ounce equals 0.0000295735295625 base units, so dividing one by the other gives the direct liter-to-fluid ounce factor of 33.8140227018.
Simple example
1 L × 33.8140227 = 33.8140227 fl oz
1 liter = 33.8140227 fluid ounces.
Real-world example
10 L × 33.8140227 = 338.140227 fl oz
10 liters = 338.140227 fluid ounces.
Conversion table
| Liter (L) | Fluid ounce (fl oz) |
|---|---|
| 1 L | 33.8140227 fl oz |
| 5 L | 169.0701135 fl oz |
| 10 L | 338.140227 fl oz |
| 25 L | 845.3505675 fl oz |
| 50 L | 1,690.701135 fl oz |
| 100 L | 3,381.40227 fl oz |
Reverse conversion: Fluid ounce to Liter
33.8140227 fl oz × 0.02957352956 = 0.9999999999 L
33.8140227 fluid ounces = 0.9999999999 liters.
liters = fluid ounces × 0.0295735295625
For a page dedicated to this direction, see Fluid ounce to Liter.
Liter vs. Fluid ounce
| Aspect | Liter | Fluid ounce |
|---|---|---|
| Family | Non-SI metric unit accepted for use with SI | US customary unit |
| Typical use | Beverage, fuel, and liquid product packaging worldwide | US beverage container sizing (soda, water bottles) |
| Where it's used | Standard volume unit for liquids worldwide, including in the US for beverages and fuel labeling in some contexts | United States (beverage, nutrition labeling) |
Understanding the Liter
Liter (L) measures volume. A liter is defined as exactly one cubic decimeter (0.001 cubic meters). It is classified as a Non-SI metric unit accepted for use with SI.
Where it's used: Standard volume unit for liquids worldwide, including in the US for beverages and fuel labeling in some contexts
Uses of the Liter today
- Beverage, fuel, and liquid product packaging worldwide
- Cooking and recipe measurement in metric countries
- Laboratory and scientific volume measurement
History of the Liter
The liter was introduced with the French metric system in 1795, originally defined as the volume of one kilogram of pure water at its freezing point — tying volume, mass, and the meter together.
Between 1901 and 1964, the liter was briefly redefined as the volume of exactly one kilogram of water at its maximum density (about 4 °C), which made it very slightly larger than a cubic decimeter. It was redefined back to exactly one cubic decimeter in 1964, the definition still used today.
Historical origin. Liter was not the invention of a single named person; it developed through the process described above.
Understanding the Fluid ounce
Fluid ounce (fl oz) measures volume. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. It is classified as a US customary unit.
Where it's used: United States (beverage, nutrition labeling)
Uses of the Fluid ounce today
- US beverage container sizing (soda, water bottles)
- US nutrition and medication dosing labels
History of the Fluid ounce
The US fluid ounce follows from the same English wine-gallon system as the rest of the US liquid volume units, defined as a consistent fraction of the gallon.
Historical origin. Fluid ounce was not the invention of a single named person; it developed through the process described above.
Liter — sources
- BIPM SI Brochure — Non-SI units accepted for use with SI — Current cubic-decimeter definition of the liter.
Fluid ounce — sources
- NIST Handbook 44, Appendix C — General tables of units including the US fluid ounce definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many fluid ounces are in 1 liter?
1 liter equals 33.8140227 fluid ounces, using the exact defined conversion factor rather than an estimate.
How do I convert liter to fluid ounce?
Multiply the liter value by 33.8140227. The converter above does this instantly to whatever precision you set.
How do I convert fluid ounce back to liter?
Use the reverse factor: 1 fluid ounce equals 0.0295735296 liters. You can also use the swap control in the converter above to flip the direction instantly.
What is a liter?
Liter (L) measures volume. A liter is defined as exactly one cubic decimeter (0.001 cubic meters). It is classified as a Non-SI metric unit accepted for use with SI.
What is a fluid ounce?
Fluid ounce (fl oz) measures volume. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. It is classified as a US customary unit.
Is the liter to fluid ounce conversion exact?
Yes. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Where is the liter still used today?
Standard volume unit for liquids worldwide, including in the US for beverages and fuel labeling in some contexts