OZ to Liters Converter

How to convert fluid ounces to liters

1 fluid ounce = 0.0295735296 liters. To convert fluid ounces to liters, divide by 33.8140227 (or multiply by 0.0295735296). A US fluid ounce is 1/128 of a US gallon, exactly 29.5735295625 ml. A liter is one cubic decimeter (1,000 cm³).

Worked examples

• 16 fluid ounces = 0.473176 L (16 ÷ 33.814023)
• 32 fluid ounces = 0.946353 L (32 ÷ 33.814023)
• 64 fluid ounces = 1.89271 L (64 ÷ 33.814023)

Where this conversion comes up

Fluid ounces are used for drink cans, baby bottles, cosmetics and US recipes; liters for bottled drinks, engine size and fuel outside the US. Common for water bottles and hydration goals: a 32 oz bottle is 0.95 L and 64 fl oz is just under 2 L.

Quick estimate

Divide by 34 to get liters (close: 33.8 fl oz = 1 L).

Common mistakes

• Multiplying instead of dividing. A liter is larger than a fluid ounce, so the number of liters must come out smaller: 16 fluid ounces = 0.473176 L.
• Mixing fluid ounces with weight ounces. A fluid ounce is a volume (29.57 ml); an ounce on a kitchen scale is a weight (28.35 g). A cup of flour is 8 fl oz by volume but only about 4.25 oz by weight.
• Using the imperial (UK) unit. This page uses US measures. An imperial gallon is 4.546 L (20% more than a US gallon), an imperial pint 568 ml and an imperial fluid ounce 28.41 ml.
• Rounding too early. Keep the full factor until the last step; rounding 0.0296 to 0.03 first puts large values noticeably off.

Going the other way? Use the liters to oz converter. Related volume converters: ml to oz, oz to ml, liters to gallons, gallons to liters, liters to quarts, quarts to liters.