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 = 0.065198472281 lb
1 fl oz = 0 lb 1.043175556496 oz

Do you want to convert pounds to fluid ounces?

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.

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.

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.

Fluid Ounce to Pound Conversion Table

Fluid ounce measurements converted to pounds for commonly used cooking and baking ingredients.
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 0.055116 lb
2 fl oz 0.130397 lb 0.134309 lb 0.114749 lb 0.06898 lb 0.110231 lb
3 fl oz 0.195595 lb 0.201463 lb 0.172124 lb 0.10347 lb 0.165347 lb
4 fl oz 0.260794 lb 0.268618 lb 0.229499 lb 0.13796 lb 0.220462 lb
5 fl oz 0.325992 lb 0.335772 lb 0.286873 lb 0.17245 lb 0.275578 lb
6 fl oz 0.391191 lb 0.402927 lb 0.344248 lb 0.20694 lb 0.330693 lb
7 fl oz 0.456389 lb 0.470081 lb 0.401623 lb 0.24143 lb 0.385809 lb
8 fl oz 0.521588 lb 0.537235 lb 0.458997 lb 0.27592 lb 0.440925 lb
9 fl oz 0.586786 lb 0.60439 lb 0.516372 lb 0.31041 lb 0.49604 lb
10 fl oz 0.651985 lb 0.671544 lb 0.573747 lb 0.3449 lb 0.551156 lb
11 fl oz 0.717183 lb 0.738699 lb 0.631121 lb 0.37939 lb 0.606271 lb
12 fl oz 0.782382 lb 0.805853 lb 0.688496 lb 0.41388 lb 0.661387 lb
13 fl oz 0.84758 lb 0.873008 lb 0.745871 lb 0.44837 lb 0.716502 lb
14 fl oz 0.912779 lb 0.940162 lb 0.803245 lb 0.48286 lb 0.771618 lb
15 fl oz 0.977977 lb 1.0073 lb 0.86062 lb 0.51735 lb 0.826734 lb
16 fl oz 1.0432 lb 1.0745 lb 0.917994 lb 0.55184 lb 0.881849 lb
17 fl oz 1.1084 lb 1.1416 lb 0.975369 lb 0.58633 lb 0.936965 lb
18 fl oz 1.1736 lb 1.2088 lb 1.0327 lb 0.62082 lb 0.99208 lb
19 fl oz 1.2388 lb 1.2759 lb 1.0901 lb 0.65531 lb 1.0472 lb
20 fl oz 1.304 lb 1.3431 lb 1.1475 lb 0.6898 lb 1.1023 lb
21 fl oz 1.3692 lb 1.4102 lb 1.2049 lb 0.72429 lb 1.1574 lb
22 fl oz 1.4344 lb 1.4774 lb 1.2622 lb 0.75878 lb 1.2125 lb
23 fl oz 1.4996 lb 1.5446 lb 1.3196 lb 0.79327 lb 1.2677 lb
24 fl oz 1.5648 lb 1.6117 lb 1.377 lb 0.82776 lb 1.3228 lb
25 fl oz 1.63 lb 1.6789 lb 1.4344 lb 0.86225 lb 1.3779 lb
26 fl oz 1.6952 lb 1.746 lb 1.4917 lb 0.89674 lb 1.433 lb
27 fl oz 1.7604 lb 1.8132 lb 1.5491 lb 0.93123 lb 1.4881 lb
28 fl oz 1.8256 lb 1.8803 lb 1.6065 lb 0.96572 lb 1.5432 lb
29 fl oz 1.8908 lb 1.9475 lb 1.6639 lb 1.0002 lb 1.5984 lb
30 fl oz 1.956 lb 2.0146 lb 1.7212 lb 1.0347 lb 1.6535 lb
31 fl oz 2.0212 lb 2.0818 lb 1.7786 lb 1.0692 lb 1.7086 lb
32 fl oz 2.0864 lb 2.1489 lb 1.836 lb 1.1037 lb 1.7637 lb
33 fl oz 2.1516 lb 2.2161 lb 1.8934 lb 1.1382 lb 1.8188 lb
34 fl oz 2.2167 lb 2.2833 lb 1.9507 lb 1.1727 lb 1.8739 lb
35 fl oz 2.2819 lb 2.3504 lb 2.0081 lb 1.2072 lb 1.929 lb
36 fl oz 2.3471 lb 2.4176 lb 2.0655 lb 1.2416 lb 1.9842 lb
37 fl oz 2.4123 lb 2.4847 lb 2.1229 lb 1.2761 lb 2.0393 lb
38 fl oz 2.4775 lb 2.5519 lb 2.1802 lb 1.3106 lb 2.0944 lb
39 fl oz 2.5427 lb 2.619 lb 2.2376 lb 1.3451 lb 2.1495 lb
40 fl oz 2.6079 lb 2.6862 lb 2.295 lb 1.3796 lb 2.2046 lb

References

1. National Institute of Standards & Technology, Culinary Measurement Tips, https://www.nist.gov/pml/owm/culinary-measurement-tips
2. 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
3. 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
4. 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
5. Encyclopædia Britannica, Avoirdupois weight, https://www.britannica.com/science/avoirdupois-weight