0z to Litres Converter
Convert ounces to liters (oz to liter) instantly with a single input. Whether you are calculating 40 oz to liters (40 oz in litres), checking liquid volume for cooking, or using our oz to ml converter, results update live as you type.
0z to Litres Converter
Calculator
Definition
An ounce (oz) in liquid measurement means a fluid ounce, a volume unit used in US customary units and the Imperial system. A litre (also spelled liter) is a metric volume unit equal to 1,000 millilitres. Need to convert directly to millilitres? Use our 0z to mL converter.
1 US fluid ounce = 0.0295735 litres. 1 litre = 33.814 US fluid ounces.
How It Works
Three simple steps to convert fluid ounces to litres with perfect accuracy.
Enter Your Value
Type any fluid ounce value into the converter. Supports whole numbers and decimals.
Apply the Formula
Our engine multiplies by the precise conversion factor: 1 fl oz = 0.0295735 L.
Get Your Result
Your litre value appears instantly. Copy it or explore the conversion table for more.
Ounces to Litres Conversion Formula
The math behind every oz to litres conversion — and how to do it by hand.
Formula for converting oz to litres
The conversion formula uses a single fixed factor. One US fluid ounce equals exactly 0.0295735295625 litres. This number comes from the international definition of the litre and the legal definition of the US fluid ounce.
Whether you're doing a volume conversion for a school assignment or a cooking measurement, this same factor applies every time.
How to convert ounces to litres manually
That's all there is to it. No complex math, no multi-step process. You multiply by one number. For a rough mental estimate: 34 fluid ounces is close to 1 litre, and 68 fluid ounces is close to 2 litres.
Common Ounce to Litre Conversions Table
A ready-made conversion chart for the most searched oz to litres values. Click any row to fill the converter.
| Fluid Ounces (fl oz) | Litres (L) | Millilitres (mL) | Context | |
|---|---|---|---|---|
| 1 fl oz | 0.029574 L | 29.6 mL | Single fluid ounce | |
| 8 fl oz | 0.236588 L | 236.6 mL | 1 cup | |
| 12 fl oz | 0.354882 L | 354.9 mL | Standard soda can | |
| 16 fl oz | 0.473176 L | 473.2 mL | 1 US pint / water bottle | |
| 16.9 fl oz | 0.499793 L | 499.8 mL | Standard water bottle (500 mL) | |
| 24 fl oz | 0.709765 L | 709.8 mL | Tall beverage container | |
| 25.4 fl oz | 0.751168 L | 751.2 mL | Wine bottle (750 mL) | |
| 32 fl oz | 0.946353 L | 946.4 mL | 1 US quart | |
| 33.81 fl oz | 0.999999 L | 1000 mL | ≈ 1 litre exactly | |
| 40 fl oz | 1.182941 L | 1182.9 mL | Large water bottle | |
| 64 fl oz | 1.892706 L | 1892.7 mL | ½ US gallon | |
| 67.63 fl oz | 1.999999 L | 2000 mL | 2-litre soda bottle | |
| 128 fl oz | 3.785412 L | 3785.4 mL | 1 US gallon |
Understanding Volume Conversions
Everything you need to know about converting between fluid ounces and litres.
The conversion formula uses a single fixed factor. 1 US fluid ounce = 0.0295735295625 litres. This number comes from the international definition of the litre (1 cubic decimetre) and the legal definition of the US fluid ounce (1/128 of a US gallon).
To convert, multiply your fluid ounce value by 0.0295735. For example, 32 fl oz × 0.0295735 = 0.946353 litres — nearly one litre. To reverse (litres to ounces), multiply the litre value by 33.814.
A US fluid ounce equals approximately 29.5735 mL, while an Imperial fluid ounce (UK) equals approximately 28.4131 mL. The Imperial fluid ounce is about 4% smaller than the US version.
This means a "16 oz" drink in the US (473 mL) would be labelled differently in the UK system. Our converter uses the US fluid ounce by default — the most commonly searched standard worldwide.
Fluid ounces measure volume, while ounces (oz) measure weight/mass. They are entirely different units sharing the same name.
For water at room temperature, 1 fluid ounce weighs roughly 1 ounce — but this is a coincidence. For heavier liquids like honey or lighter ones like oil, the weight and volume diverge. Our converter works exclusively with fluid ounces (volume).
0z-to-litre conversions come up constantly. Cooking: American recipes use fluid ounces, but metric kitchens use litres and millilitres. Travel: TSA allows 3.4 oz (100 mL) containers — that's 0.1 litres. For millilitre measurements, try our 0z to mL converter.
International Support: Converting ounces to litres is also available in Spanish (Español), Russian (Русский), German (Deutsch), French (Français), Polish (Polski), Japanese (日本語), Arabic (العربية), Turkish (Türkçe), and Bulgarian (Български).
Frequently Asked Questions
Answers to the most common oz to litres questions.
To convert ounces to liters (oz to liter), multiply your US fluid ounce value by 0.0295735. For example, 40 oz × 0.0295735 ≈ 1.183 liters. If you need milliliters instead, try our oz to ml converter.
40 oz to liters (40 oz in litres) is approximately 1.183 liters (1,182.94 mL) — just over 1 full liter, a standard size for large hydration flasks and water bottles.
There are about 33.814 US fluid ounces in 1 litre. If you're using Imperial fluid ounces (UK), 1 litre contains roughly 35.195 fluid ounces.
No. 32 US fluid ounces equals about 0.946 litres — roughly 5% less than a full litre. You need 33.814 fluid ounces for exactly 1 litre.
No. 24 US fluid ounces equals about 0.710 litres (710 millilitres) — about 71% of a full litre.
8 US fluid ounces equals about 0.2366 litres (237 millilitres) — the same as 1 standard US cup.
64 US fluid ounces equals about 1.893 litres — half a US gallon and close to many daily hydration targets.
2 litres equals about 67.628 US fluid ounces. A standard 2-litre soda bottle holds this amount.
3 litres equals about 101.442 US fluid ounces — useful for tracking daily hydration.
8 litres equals about 270.512 US fluid ounces — slightly more than 2 US gallons (256 oz).