Convert OZ to Litre Accurately

The exact conversion factor between US fluid ounces and litres is: 1 fluid ounce = 0.0295735295625 litres.

Conversely, 1 litre = 33.8140227018 fluid ounces. For most practical purposes, these values are often rounded to 1 fl oz = 0.03 L or 1 L = 33.81 fl oz, but our converter uses the full precision.

"Litre" and "liter" are two spellings of the same unit of volume measurement:

• Litre: The international standard spelling used in most countries worldwide
• Liter: The American English spelling used primarily in the United States

Both refer to exactly the same volume: 1 cubic decimeter (1000 cubic centimeters). This converter uses the international spelling "litre" but recognizes both variations.

Yes, there is a significant difference between US and UK fluid ounces:

• 1 US fluid ounce = 0.0295735 litre
• 1 UK fluid ounce = 0.0284131 litre
• This represents about a 4% difference between the two units

This converter uses US fluid ounces, which are commonly used in the United States and for most international recipes. If you need UK fluid ounce conversions, look for a converter specifically labeled for imperial units.

The variation in volume measurement systems stems from historical, cultural, and political factors:

• Metric system (litres, millilitres): Used by most countries globally, based on decimal units for easy conversion
• US customary system (fluid ounces, gallons): Derived from older British units but with distinct definitions
• Imperial system (UK fluid ounces, gallons): Used in some Commonwealth countries, with different values than US units

The metric system is the international standard for science, medicine, and most trade, but US customary units remain common in the United States for everyday measurements.

Fluid ounce to litre conversion is commonly needed in:

• Following international recipes using metric measurements
• Understanding product sizes when shopping for imported goods
• Complying with airline regulations for carry-on liquids (typically 100ml-1L)
• Calculating ingredient quantities for large-scale cooking or baking
• Comparing product sizes and values when shopping
• Understanding medical dosages or scientific measurements