The Quick Answer:
1 liter = 33.814 US fluid ounces

As you can see, it’s not a simple conversion. So for most of us in the U.S., stick with 33.8 ounces per liter, or round up to 34 ounces. In the U.S. you’ll commonly find liquid measurements in ounces or liters, and similarly we offer Rambler® Bottles sized in ounces, and Yonder® in mL.
What Is a Liter?
A liter (L) is a metric unit of volume commonly used to measure liquids. It is part of the International System of Units (SI) and is widely used worldwide, especially in countries that follow the metric system.
How Much Is a Liter?
A liter is equivalent to:
- 1,000 milliliters (mL)
- 4.226 cups (U.S.)
- 2.11 pints (U.S.)
- 1.057 quarts (U.S.)
Common Uses for Liters
Liters are often used to measure:
- Beverages – Bottled water, soda, and milk are commonly sold in liters.
- Cooking & Recipes – Many recipes outside the U.S. use liters instead of quarts or gallons.
- Fuel Measurement – Gasoline is often measured in liters outside the United States.
- Science & Medicine – Precise liquid measurements in chemistry and healthcare.
Since the liter is a metric measurement, it may not be as intuitive for those more familiar with the U.S. customary system, which uses ounces, pints, quarts, and gallons. That’s why conversions like liters to ounces are so useful!
What Is an Ounce?
The term ounce (oz) can refer to two different units of measurement: fluid ounces (fl oz) for liquids and ounces (oz) for weight. In this post, we’re specifically talking about fluid ounces, which measure volume.
How Much Is a Fluid Ounce?
A fluid ounce is a small unit of volume used mainly in the United States and the United Kingdom, but the measurement differs slightly between the two systems:
