Fluid Ounces to Pounds & Ounces Conversion Calculator
Enter the volume in fluid ounces below to calculate the weight in pounds.
Result in Pounds:
1 fl oz = 0 lb 1.043175556496 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 15.3378 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 / 15.3378
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 15.3378.
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 / 15.3378 = 0.2282 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.
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 | 0.065198 lb | 0.067154 lb | 0.057375 lb | 0.03449 lb | 0.045965 lb |
| 2 fl oz | 0.130397 lb | 0.134309 lb | 0.114749 lb | 0.06898 lb | 0.09193 lb |
| 3 fl oz | 0.195595 lb | 0.201463 lb | 0.172124 lb | 0.10347 lb | 0.137895 lb |
| 4 fl oz | 0.260794 lb | 0.268618 lb | 0.229499 lb | 0.13796 lb | 0.18386 lb |
| 5 fl oz | 0.325992 lb | 0.335772 lb | 0.286873 lb | 0.17245 lb | 0.229825 lb |
| 6 fl oz | 0.391191 lb | 0.402927 lb | 0.344248 lb | 0.20694 lb | 0.27579 lb |
| 7 fl oz | 0.456389 lb | 0.470081 lb | 0.401623 lb | 0.24143 lb | 0.321754 lb |
| 8 fl oz | 0.521588 lb | 0.537235 lb | 0.458997 lb | 0.27592 lb | 0.367719 lb |
| 9 fl oz | 0.586786 lb | 0.60439 lb | 0.516372 lb | 0.31041 lb | 0.413684 lb |
| 10 fl oz | 0.651985 lb | 0.671544 lb | 0.573747 lb | 0.3449 lb | 0.459649 lb |
| 11 fl oz | 0.717183 lb | 0.738699 lb | 0.631121 lb | 0.37939 lb | 0.505614 lb |
| 12 fl oz | 0.782382 lb | 0.805853 lb | 0.688496 lb | 0.41388 lb | 0.551579 lb |
| 13 fl oz | 0.84758 lb | 0.873008 lb | 0.745871 lb | 0.44837 lb | 0.597544 lb |
| 14 fl oz | 0.912779 lb | 0.940162 lb | 0.803245 lb | 0.48286 lb | 0.643509 lb |
| 15 fl oz | 0.977977 lb | 1.0073 lb | 0.86062 lb | 0.51735 lb | 0.689474 lb |
| 16 fl oz | 1.0432 lb | 1.0745 lb | 0.917994 lb | 0.55184 lb | 0.735439 lb |
| 17 fl oz | 1.1084 lb | 1.1416 lb | 0.975369 lb | 0.58633 lb | 0.781404 lb |
| 18 fl oz | 1.1736 lb | 1.2088 lb | 1.0327 lb | 0.62082 lb | 0.827369 lb |
| 19 fl oz | 1.2388 lb | 1.2759 lb | 1.0901 lb | 0.65531 lb | 0.873334 lb |
| 20 fl oz | 1.304 lb | 1.3431 lb | 1.1475 lb | 0.6898 lb | 0.919298 lb |
| 21 fl oz | 1.3692 lb | 1.4102 lb | 1.2049 lb | 0.72429 lb | 0.965263 lb |
| 22 fl oz | 1.4344 lb | 1.4774 lb | 1.2622 lb | 0.75878 lb | 1.0112 lb |
| 23 fl oz | 1.4996 lb | 1.5446 lb | 1.3196 lb | 0.79327 lb | 1.0572 lb |
| 24 fl oz | 1.5648 lb | 1.6117 lb | 1.377 lb | 0.82776 lb | 1.1032 lb |
| 25 fl oz | 1.63 lb | 1.6789 lb | 1.4344 lb | 0.86225 lb | 1.1491 lb |
| 26 fl oz | 1.6952 lb | 1.746 lb | 1.4917 lb | 0.89674 lb | 1.1951 lb |
| 27 fl oz | 1.7604 lb | 1.8132 lb | 1.5491 lb | 0.93123 lb | 1.2411 lb |
| 28 fl oz | 1.8256 lb | 1.8803 lb | 1.6065 lb | 0.96572 lb | 1.287 lb |
| 29 fl oz | 1.8908 lb | 1.9475 lb | 1.6639 lb | 1.0002 lb | 1.333 lb |
| 30 fl oz | 1.956 lb | 2.0146 lb | 1.7212 lb | 1.0347 lb | 1.3789 lb |
| 31 fl oz | 2.0212 lb | 2.0818 lb | 1.7786 lb | 1.0692 lb | 1.4249 lb |
| 32 fl oz | 2.0864 lb | 2.1489 lb | 1.836 lb | 1.1037 lb | 1.4709 lb |
| 33 fl oz | 2.1516 lb | 2.2161 lb | 1.8934 lb | 1.1382 lb | 1.5168 lb |
| 34 fl oz | 2.2167 lb | 2.2833 lb | 1.9507 lb | 1.1727 lb | 1.5628 lb |
| 35 fl oz | 2.2819 lb | 2.3504 lb | 2.0081 lb | 1.2072 lb | 1.6088 lb |
| 36 fl oz | 2.3471 lb | 2.4176 lb | 2.0655 lb | 1.2416 lb | 1.6547 lb |
| 37 fl oz | 2.4123 lb | 2.4847 lb | 2.1229 lb | 1.2761 lb | 1.7007 lb |
| 38 fl oz | 2.4775 lb | 2.5519 lb | 2.1802 lb | 1.3106 lb | 1.7467 lb |
| 39 fl oz | 2.5427 lb | 2.619 lb | 2.2376 lb | 1.3451 lb | 1.7926 lb |
| 40 fl oz | 2.6079 lb | 2.6862 lb | 2.295 lb | 1.3796 lb | 1.8386 lb |
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