Convert Pounds to Ounces Instantly
Use this Pounds to Ounces converter to change weight from pounds (lb) into ounces (oz) instantly. Enter any whole, fractional or decimal pound value to see ounces, grams and kilograms, or switch to the reverse calculator when your starting measurement is already in ounces.
Convert pounds to ounces, reverse ounces to pounds, combine pounds with extra ounces, or convert one weight across common US customary and metric units.
Enter pounds to calculate the equivalent number of ounces plus useful metric mass values.
Decimals are supported, such as 0.25, 1.5 or 12.75 lb.
Reverse the conversion by dividing ounces by 16.
Enter a mixed weight such as 3 lb 8 oz and convert it into total ounces, decimal pounds, grams and kilograms.
Enter one weight value and choose its starting unit to convert among pounds, ounces, kilograms and grams.
Converting pounds to ounces is straightforward because the avoirdupois system uses a fixed relationship: 1 pound equals exactly 16 ounces. To convert pounds to ounces, multiply the pound value by 16. This rule works for whole pounds, fractions and decimal values.
For example, 3 pounds contains 48 ounces because 3 × 16 = 48. A smaller value such as 0.5 pound contains 8 ounces. A decimal value such as 2.75 pounds contains 44 ounces.
Example: 2.5 lb × 16 = 40 oz.
Example: 64 oz ÷ 16 = 4 lb.
The pound and ounce used on this page are the common avoirdupois units used for everyday weight in the United States and in many commercial contexts. In this system, one pound contains 16 ounces. The international avoirdupois pound is also defined as exactly 0.45359237 kilogram.
Use this pounds to ounces chart for quick reference. Every value uses the exact 16-ounce-per-pound relationship.
| Pounds (lb) | Ounces (oz) | Grams (g) | Kilograms (kg) |
|---|---|---|---|
| 0.0625 lb | 1 oz | 28.3495 g | 0.02835 kg |
| 0.125 lb | 2 oz | 56.6990 g | 0.05670 kg |
| 0.25 lb | 4 oz | 113.3981 g | 0.11340 kg |
| 0.5 lb | 8 oz | 226.7962 g | 0.22680 kg |
| 0.75 lb | 12 oz | 340.1943 g | 0.34019 kg |
| 1 lb | 16 oz | 453.5924 g | 0.45359 kg |
| 1.5 lb | 24 oz | 680.3886 g | 0.68039 kg |
| 2 lb | 32 oz | 907.1847 g | 0.90718 kg |
| 2.5 lb | 40 oz | 1,133.9809 g | 1.13398 kg |
| 3 lb | 48 oz | 1,360.7771 g | 1.36078 kg |
| 4 lb | 64 oz | 1,814.3695 g | 1.81437 kg |
| 5 lb | 80 oz | 2,267.9619 g | 2.26796 kg |
| 10 lb | 160 oz | 4,535.9237 g | 4.53592 kg |
| 20 lb | 320 oz | 9,071.8474 g | 9.07185 kg |
| 50 lb | 800 oz | 22,679.6185 g | 22.67962 kg |
| 100 lb | 1,600 oz | 45,359.237 g | 45.35924 kg |
0.25 × 16 = 4 oz.
1.5 × 16 = 24 oz.
3.75 × 16 = 60 oz.
12 × 16 = 192 oz.
If you are working with a fraction, convert it to a decimal or multiply the fraction directly. For example, three-quarters of a pound is 0.75 lb, and 0.75 × 16 = 12 oz. One-eighth of a pound is 0.125 lb, which equals 2 oz.
The ordinary pound and ounce belong to the avoirdupois system. The system divides one pound into 16 equal ounces, so the relationship is exact and does not require an approximate conversion factor. This makes lb-to-oz calculations especially simple compared with conversions between customary and metric units.
When converting to metric mass, the exact international avoirdupois pound is 453.59237 grams. Dividing that by 16 gives 28.349523125 grams per avoirdupois ounce. These exact relationships allow a calculator to move consistently among pounds, ounces, grams and kilograms.
Think of one pound as sixteen equal one-ounce portions. The total weight stays the same; only the unit used to express it changes.
A pounds to ounces conversion is useful whenever a larger customary weight needs to be expressed in a smaller unit. Cooking, grocery packaging, shipping, parcel handling, pet supplies, home projects and product specifications may use either pounds or ounces. Converting everything into one unit makes comparison easier.
For example, a 2.25-pound package weighs 36 ounces. A 7.5-pound item weighs 120 ounces. If two product labels use different units, converting pounds to ounces allows a direct comparison without guessing.
Pounds (lb) and ounces (oz) are customary units of weight commonly used in the United States. Grams (g) and kilograms (kg) are metric mass units used internationally. One pound contains exactly 16 avoirdupois ounces and equals exactly 453.59237 grams, while one kilogram equals 1,000 grams.
If your measurement is already metric, use our Kilograms to Pounds, Kilograms to Grams or Grams to Kilograms tools. To reverse the main conversion, see Ounces to Pounds.
Fractions of a pound use the same ×16 formula. Half a pound equals 8 ounces, one quarter pound equals 4 ounces, three quarters of a pound equals 12 ounces and one eighth pound equals 2 ounces. These common fractions are especially useful in food, package and household measurements.
For less familiar fractions, either convert the fraction to a decimal or multiply it by 16 directly. For example, 5/8 lb × 16 = 10 oz. If a digital scale displays 1.375 lb, multiplying 1.375 by 16 gives 22 oz.
To reverse the conversion, divide the number of ounces by 16. For example, 24 oz ÷ 16 = 1.5 lb; 40 oz ÷ 16 = 2.5 lb; and 100 oz ÷ 16 = 6.25 lb. If you prefer mixed units, the whole-number part is the pounds and the remainder can be expressed as ounces.
For example, 58 oz equals 3.625 lb. In mixed form, 48 oz makes 3 whole pounds and 10 oz remains, so the same weight can be written as 3 lb 10 oz.
For lb → oz, multiply by 16. Divide by 16 only for oz → lb.
Fluid ounces measure volume. Ounces on this page measure weight/mass.
Precious metals use troy ounces, which are not the same as avoirdupois ounces.
Keep full precision when converting pounds or ounces into grams or kilograms.
An avoirdupois ounce (oz) measures weight or mass, while a fluid ounce (fl oz) measures volume. They are different physical quantities and cannot be converted directly without knowing the density of the substance. For example, 16 ounces by weight is exactly one pound, but 16 US fluid ounces is a volume equal to one US pint.
For standards and official conversion information, see the NIST SI Units – Mass resources and NIST Guide to the SI, Appendix B conversion factors. These references document relationships between customary and SI units used for accurate mass conversion.
Continue with related converters including Ounces to Pounds, Kilograms to Pounds, Pounds to Kilograms, Kilograms to Grams and Grams to Kilograms. Keeping measurements in a consistent unit is useful when comparing product weights, recipes, shipping data and material quantities.
Quick answers about pounds, ounces and everyday weight conversion.