Fluid Ounces to Liters
An instant fluid ounces-to-liters converter, with the formula and a reference table below.
| Fluid Ounces | Liters |
|---|---|
| 1 fl oz | 0.029574 L |
| 2 fl oz | 0.059147 L |
| 3 fl oz | 0.088721 L |
| 5 fl oz | 0.147868 L |
| 10 fl oz | 0.295735 L |
| 25 fl oz | 0.739338 L |
| 50 fl oz | 1.478676 L |
| 100 fl oz | 2.957353 L |
How to use
- Enter a value in the Fluid Ounces field.
- The Liters figure appears immediately — no button to press.
- Typing in the Liters field converts back to Fluid Ounces the same way.
- Use the reference table for the values that come up most often.
Fluid Ounces to Liters formula
Converting fluid ounces to liters is a single multiplication by 0.0295735296.
L = fl oz × 0.0295735296
Why this factor: the fluid ounce and the liter are both defined against the liter, so dividing one definition by the other gives 0.0295735296 directly. Both definitions are set out in full below.
To go the other way, divide by 0.0295735296 — or use the Liters to Fluid Ounces converter, which is the same calculation reversed.
Worked example
Start with 8 fl oz. Multiply by 0.0295735296 to get 0.236588 L.
8 fl oz × 0.0295735296 = 0.236588 L
The converter above does this for any value you type, in either direction.
What is a fluid ounce?
A US fluid ounce is a small liquid volume, one eighth of a cup.
Definition: Exactly one 128th of a US liquid gallon, so exactly 29.5735295625 milliliters.
Where it is used: Beverage cans and bottles, cosmetics, and small liquid quantities in the US.
Worth knowing: Measures volume, not weight — a fluid ounce of water weighs about 1.04 avoirdupois ounces. The imperial fluid ounce is 28.41 mL.
What is a liter?
A liter is the everyday metric unit of volume, equal to the space in a 10 cm cube.
Definition: Exactly one cubic decimeter, so exactly 0.001 cubic meter. Accepted for use with SI but not an SI unit itself.
Where it is used: Fuel, beverages, engine displacement, and recipe volumes across the metric world.
Fluid Ounces vs Liters
The fluid ounce is a US customary unit while the liter is a metric unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many liters are in a fluid ounce?
One fluid ounce equals 0.0295735296 liters.
What is the formula to convert fluid ounces to liters?
Multiply the number of fluid ounces by 0.0295735296. To reverse it, divide by 0.0295735296 instead.
How do I convert liters back to fluid ounces?
Divide by 0.0295735296, which is the same as multiplying by 33.8140227.
How many liters are in 10 fluid ounces?
10 fl oz works out to 0.295735 L.
Is there anything to watch out for with fluid ounces?
Measures volume, not weight — a fluid ounce of water weighs about 1.04 avoirdupois ounces. The imperial fluid ounce is 28.41 mL.
How is the fluid ounce defined?
Exactly one 128th of a US liquid gallon, so exactly 29.5735295625 milliliters.