conversions
How Many Ounces in a Liter
Last updated: May 31, 2026
Written by Blake Boege
An ounces-in-a-liter conversion translates metric volume to customary volume. A standard liter is equivalent to approximately 33.814 US fluid ounces (each US fluid ounce being 29.57 mL) or 35.195 Imperial fluid ounces (each Imperial fluid ounce being 28.41 mL). This is commonly used in beverage portioning, chemistry, and shipping.
Find out how many fluid ounces are in a liter under the US customary and British Imperial standards. Use our simple converter to switch units instantly.
Quick Answer
Find the exact number of US or Imperial fluid ounces in a liter and convert between liters and ounces instantly.
How Many Ounces in a Liter?
There are approximately 33.814 fluid ounces in a US liter.
In the Imperial system (UK), there are approximately 35.195 fluid ounces in a liter.
Liquid Measurement System
Formula: 1 Liter ≈ 33.814 US fl oz
US Liters to Ounces
| Liters (L) | US Fluid Ounces |
|---|---|
| 0.25 L | 8.45 fl oz |
| 0.5 L | 16.91 fl oz |
| 1 L | 33.81 fl oz |
| 2 L | 67.63 fl oz |
| 5 L | 169.07 fl oz |
Imperial Liters to Ounces
| Liters (L) | UK Fluid Ounces |
|---|---|
| 0.25 L | 8.80 fl oz |
| 0.5 L | 17.60 fl oz |
| 1 L | 35.20 fl oz |
| 2 L | 70.39 fl oz |
| 5 L | 175.98 fl oz |
Examples
1 Liter (US)
33.814 fl oz
1 Liter (Imperial)
35.195 fl oz
2 Liters (US)
67.628 fl oz
How it works
To convert liters to fluid ounces, multiply the number of liters by the appropriate conversion factor:
US Customary System
1 Liter ≈ 33.814 fl oz
Imperial System (UK)
1 Liter ≈ 35.195 fl oz
Comparing Volume Systems: Metric vs. US vs. Imperial
The liter is a metric unit of volume, defined as exactly 1,000 cubic centimeters. In the US, recipes and beverage containers generally use the US Customary system.
Because a US fluid ounce (29.57 mL) is larger than an Imperial fluid ounce (28.41 mL), a liter actually converts into a smaller number of ounces under the US system than it does under the Imperial system.
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Frequently asked questions
A 2-liter bottle contains approximately 67.628 US fluid ounces (2 × 33.814) or 70.39 Imperial fluid ounces.
Historically, the US and British systems defined their gallons differently. A US fluid ounce is defined relative to the US gallon (1/128th of a gallon), making it approximately 29.57 mL. An Imperial fluid ounce is defined relative to the Imperial gallon (1/160th of a gallon), making it approximately 28.41 mL.
Yes. Fluid ounces measure liquid volume (space), while dry ounces measure weight (mass) using a scale. A liter of different liquids (like honey vs. water) will weigh different amounts of dry ounces due to density variations.
16 US fluid ounces is equal to approximately 0.473 liters (half a US quart or one pint).
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