According to the University of North Carolina, there are 33.8140226 fluid ounces in one standard liter. Frequently rounded to 33.81 fluid ounces, the number represents a volume measurement for liquids. Fluid ounces and liters are both liquid volume measurements.
A liter is a little more than one quart (32 fluid ounces) and four liters is a little more than a gallon (four quarts or 128 fluid ounces). So, for simple conversion tables that involve cooking or health care calculations, a measure of 32 fluid ounces generally represents one liter. Similarly, 32 fluid ounces often is acceptable as four cups of liquid, since 8 ounces convert to one cup and 4 cups equal one quart.
Changing fluid ounces to liters is basic multiplication. One fluid ounce is equal to 0.0296 liter. Multiplying the number of fluid ounces by 0.0296 yields the liter conversion.