Fluid Ounces to Pounds Conversion Calculator
Enter the volume in fluid ounces below to calculate the weight in pounds.
Result: Pounds
1 fl oz = 0 lb 1.043168 oz
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How to Convert Fluid Ounces to Pounds
Since fluid ounces are a unit of volume and pounds are a unit of mass, which are different physical quantities, we need to know one more physical quantity of the ingredient or substance to convert between them. In this case, we need to account for the density of the substance whenever we do a conversion.
Therefore, to convert between fluid ounces and pounds of an ingredient or substance, we must either multiply or divide by its density, depending on which direction we are performing the conversion.
Fluid Ounces to Pounds Formula
To convert a measurement in fluid ounces to pounds, multiply the volume by the density of the ingredient, substance, or material. Note that in order for this to work, the density must be in pounds per fluid ounce (lb/fl oz).
If the density is given in grams per milliliter (g/mL), then first divide the density by 15.3379 to convert to lb/fl oz.
For a density given in g/mL, you can use this simple formula to convert:
pounds = fluid ounces × density / 15.3379
Thus, the weight in pounds is equal to the volume in fluid ounces times the density (in g/mL) of the ingredient or material divided by 15.3379.
For example, here's how to convert 5 fluid ounces to pounds for an ingredient with a density of 0.7 g/mL.
pounds = 5 fl oz × 0.7 g/mL / 15.3379 = 0.2282 lb
Fluid Ounce to Pound Conversion Table
| Volume in Fluid Ounces: | Weight in Pounds of: | ||||
|---|---|---|---|---|---|
| Water | Milk | Cooking Oil | All Purpose Flour | Granulated Sugar | |
| 1 fl oz | 0.065 lb | 0.067 lb | 0.057 lb | 0.034 lb | 0.055 lb |
| 2 fl oz | 0.13 lb | 0.134 lb | 0.115 lb | 0.069 lb | 0.11 lb |
| 3 fl oz | 0.196 lb | 0.201 lb | 0.172 lb | 0.103 lb | 0.165 lb |
| 4 fl oz | 0.261 lb | 0.269 lb | 0.229 lb | 0.138 lb | 0.22 lb |
| 5 fl oz | 0.326 lb | 0.336 lb | 0.287 lb | 0.172 lb | 0.276 lb |
| 6 fl oz | 0.391 lb | 0.403 lb | 0.344 lb | 0.207 lb | 0.331 lb |
| 7 fl oz | 0.456 lb | 0.47 lb | 0.402 lb | 0.241 lb | 0.386 lb |
| 8 fl oz | 0.522 lb | 0.537 lb | 0.459 lb | 0.276 lb | 0.441 lb |
| 9 fl oz | 0.587 lb | 0.604 lb | 0.516 lb | 0.31 lb | 0.496 lb |
| 10 fl oz | 0.652 lb | 0.672 lb | 0.574 lb | 0.345 lb | 0.551 lb |
| 11 fl oz | 0.717 lb | 0.739 lb | 0.631 lb | 0.379 lb | 0.606 lb |
| 12 fl oz | 0.782 lb | 0.806 lb | 0.688 lb | 0.414 lb | 0.661 lb |
| 13 fl oz | 0.848 lb | 0.873 lb | 0.746 lb | 0.448 lb | 0.717 lb |
| 14 fl oz | 0.913 lb | 0.94 lb | 0.803 lb | 0.483 lb | 0.772 lb |
| 15 fl oz | 0.978 lb | 1.007 lb | 0.861 lb | 0.517 lb | 0.827 lb |
| 16 fl oz | 1.043 lb | 1.074 lb | 0.918 lb | 0.552 lb | 0.882 lb |
| 17 fl oz | 1.108 lb | 1.142 lb | 0.975 lb | 0.586 lb | 0.937 lb |
| 18 fl oz | 1.174 lb | 1.209 lb | 1.033 lb | 0.621 lb | 0.992 lb |
| 19 fl oz | 1.239 lb | 1.276 lb | 1.09 lb | 0.655 lb | 1.047 lb |
| 20 fl oz | 1.304 lb | 1.343 lb | 1.147 lb | 0.69 lb | 1.102 lb |
When to Convert Fluid Ounces to Pounds
Fluid ounces and pounds are both commonly used to measure cooking ingredients.
For cooking applications, most chefs suggest measuring dry ingredients by weight rather than volume to improve accuracy in the measurements.[1] The density of dry ingredients can vary for a variety of reasons, such as compaction and clumping.
The best way to ensure an accurate conversion is to use a scale. When a scale is not available, a calculator like the one above is a good way to estimate the volume to weight conversion.
Another useful application of weight and volume conversions is chemistry. When performing chemical reactions by combining separate chemicals to produce a new chemical, one must know the exact amount of each chemical to add in order to maximize the yield of the reaction.
It is common to mix powdered chemicals with liquid, or aqueous, chemicals, and this is where it becomes very useful to convert between weights and volumes.[2]
A third application of weight and volume conversions is when shipping freight when calculating the volumetric weight for cargo and packages. Trucks, ships, and airplanes are limited in the amount of weight or volume they can transport, so if one of those quantities is known, but the limitation is on the other, then it becomes necessary to convert between the two so as not to overload the shipping vehicle.
Keep reading to learn more about each unit of measure.
What Is a Fluid Ounce?
The US fluid ounce is a unit of volume equal to 1/16 of a pint or 1/8 of a cup. The fluid ounce is sometimes referred to as just an "ounce" but should not be confused with the unit of weight. One fluid ounce is equal to approximately 29.5735 milliliters, but in nutrition labeling, one fluid ounce is rounded to exactly 30 milliliters.[3]
The fluid ounce is a US customary unit of volume. Fluid ounces can be abbreviated as fl oz, and are also sometimes abbreviated as oz fl. For example, 1 fluid ounce can be written as 1 fl oz or 1 oz fl.
Learn more about fluid ounces.
What Is a Pound?
Pounds are a widely used unit of weight in the United States. The National Bureau of Standards approved the international definition of the pound for use in the United States in 1959 after an agreement between six nations referred to as the International Yard and Pound Agreement.[4]
One pound is equal to 16 ounces, or 0.45359237 kilograms. In the avoirdupois or apothecaries' systems, one pound is equal to 7,000 grains.[5]
The pound is a US customary and imperial unit of mass. A pound is sometimes also referred to as a common ounce. Pounds can be abbreviated as lb (plural lbs), and are also sometimes abbreviated as lbm or #. For example, 1 pound can be written as 1 lb, 1 lbm, or 1 #, and 2 pounds can be written as 2 lbs.
A pound is also frequently referred to as a unit of weight. While technically, a pound is a measure of mass, and weight is actually a measure of force, the two are equivalent as long as we are performing our calculations on Earth.
For example, an object with a mass of 1 pound weighs 1 pound on Earth, but only weighs one-sixth of that on the moon, yet still has the same mass.
Learn more about pounds.
References
- National Institute of Standards & Technology, Culinary Measurement Tips, https://www.nist.gov/pml/owm/culinary-measurement-tips
- CK-12 Foundation, Introductory Chemistry (CK-12) - 12.6: Mass-Volume Stoichiometry, https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/12%3A_Stoichiometry/12.06%3A_Mass-Volume_Stoichiometry
- U.S. Food & Drug Administration, Guidance for Industry: Guidelines for Determining Metric Equivalents of Household Measures, https://www.fda.gov/regulatory-information/search-fda-guidance-documents/guidance-industry-guidelines-determining-metric-equivalents-household-measures
- National Bureau of Standards, Refinement of Values for the Yard and Pound, U.S. Department of Commerce, July 1, 1959, https://www.nist.gov/system/files/documents/2017/05/09/frn-59-5442-1959.pdf
- Encyclopædia Britannica, Avoirdupois weight, https://www.britannica.com/science/avoirdupois-weight