US Fluid Ounces to Liters (fl oz to L)
1 US fluid ounce equals 0.02957352956 liters (rounded).
How to convert US fluid ounces to liters
To convert US fluid ounces to liters, multiply the number of US fluid ounces by 0.02957352956. The factor is rounded to 10 significant digits. To go the other way, multiply liters by 33.8140227 (rounded).
liters = US fluid ounces × 0.02957352956
Example: 10 US fluid ounces = 0.2957352956 liters.
Pints, quarts, gallons and fluid ounces differ between the US and the UK. Units are labeled 'US' or 'imperial' to avoid confusion.
About these units
US Fluid Ounce (fl oz)
One 128th of a US gallon, 29.5735 mL. Not the same as the weight ounce, and about 4% larger than the imperial fluid ounce.
Fluid ounce began as an attempt to link volume to weight: the volume occupied by one ounce of some substance, such as wine in England or water in Scotland. Definitions varied by region and by liquid. When Britain defined its imperial gallon in 1824 as the space of ten pounds of water, the imperial fluid ounce came out so that an ounce of water weighs about one avoirdupois ounce. The US fluid ounce followed a different path and comes from the older wine gallon.
The US fluid ounce is exactly 1/128 of a US gallon, 29.5735295625 milliliters, about 4 percent bigger than the imperial one at 28.4130625 milliliters. American nutrition labels use yet another figure, treating one fluid ounce as 30 milliliters, a convenient rounding for serving sizes. The name is a trap, because a fluid ounce measures space while a weight ounce measures mass. A US fluid ounce of water weighs a bit more than an ounce of weight, while a fluid ounce of honey weighs considerably more.
1 US fluid ounce = 0.02957352956 liters (approximately).
Sources: Wikipedia: Fluid ounce; NIST SP 811, Appendix B.8: conversion factors for volume; 21 CFR 101.9: nutrition labeling household measures
Liter (L)
One cubic decimeter (1,000 cm³). The everyday metric unit of volume for drinks, fuel and cooking.
The liter was born in revolutionary France. In 1795 it was introduced as a republican unit and defined as one cubic decimeter, while the gram was tied to a cubic centimeter of water. The name comes from the older French litron, itself descended from a Byzantine Greek unit of weight, not volume. A small revision of the decimeter in 1798 left the first liter about 1.000974 of today's cubic decimeter, and in 1879 the international metric authorities adopted the liter with the symbol l.
The liter then took a strange detour. In 1901 it was redefined as the space taken up by one kilogram of pure water at its densest, which made it about 1.000028 cubic decimeters, and that muddled definition lasted until 1964, when it was restored to exactly one cubic decimeter. A capital L was added as an alternative symbol in 1979 because a lowercase l is easy to mistake for the digit 1, and NIST says L is the symbol to use in the United States. A liter of water is close to a kilogram, which is why a one-liter bottle feels like a kilo in the hand.
The liter is the reference unit for volume on this site.
Sources: Wikipedia: Litre; NIST Guide to the SI, Chapter 5: units outside the SI
Related conversions
- Liters to US fluid ounces (reverse)
- US fluid ounces to milliliters
- US fluid ounces to US gallons
- US fluid ounces to US cups
- US fluid ounces to cubic meters
- US fluid ounces to cubic centimeters
- US fluid ounces to US quarts
- US fluid ounces to US pints
- US fluid ounces to US tablespoons
- US fluid ounces to US teaspoons
- US fluid ounces to metric cups
- US fluid ounces to metric tablespoons
- US fluid ounces to metric teaspoons
- Milliliters to liters
- US gallons to liters
- US cups to liters
- Cubic meters to liters
- Cubic centimeters to liters
- US quarts to liters
- US pints to liters
- US tablespoons to liters
- US teaspoons to liters
- Metric cups to liters
- Metric tablespoons to liters
- Metric teaspoons to liters
See all volume units.