Convert pounds (lb) to ounces (oz) instantly using our free online weight converter. Enter any weight in pounds to calculate its equivalent in ounces, along with the exact conversion formula, step-by-step calculation, and a helpful reference table.
1 pound = 16 ounces
To convert pounds (lb) to ounces (oz), multiply the weight in pounds by 16. For example, 10 lb × 16 = 160 oz.
One international avoirdupois pound contains exactly 16 avoirdupois ounces. This fixed relationship makes converting between pounds and ounces straightforward.
The conversion factor is exact, so an exact decimal input needs no rounding.
Half a pound equals 8 ounces, while a quarter pound equals 4 ounces. Use the calculator above to convert whole numbers or decimals.
Common whole-pound and fractional-pound conversions, calculated using the exact factor of 16.
| Pounds (lb) | Ounces (oz) |
|---|---|
| 0.0625 lb | 1 oz |
| 0.125 lb | 2 oz |
| 0.25 lb | 4 oz |
| 0.5 lb | 8 oz |
| 0.75 lb | 12 oz |
| 1 lb | 16 oz |
| 1.5 lb | 24 oz |
| 2 lb | 32 oz |
| 2.5 lb | 40 oz |
| 3 lb | 48 oz |
| 4 lb | 64 oz |
| 5 lb | 80 oz |
| 10 lb | 160 oz |
| 15 lb | 240 oz |
| 20 lb | 320 oz |
| 25 lb | 400 oz |
| 50 lb | 800 oz |
| 100 lb | 1,600 oz |
A pound is a unit of mass commonly used in the United States and in other contexts that use customary or imperial measurements. The international avoirdupois pound equals exactly 0.45359237 kilograms.
Pounds are frequently used for body weight, groceries, packaged products, and shipping. The standard symbol is lb; “lbs” is common informally.
An avoirdupois ounce is a smaller unit of mass equal to exactly 28.349523125 grams.
Ounces are used for food portions, small packages, and cooking ingredients. Both units measure mass in the avoirdupois system; one pound is 16 times as large as one ounce.
Recipes and food labels often express pounds as fractions. Multiply the decimal equivalent of the fraction by 16.
A package weighing 1¼ pounds has a mass of 1.25 × 16 = 20 oz. Use the fractional-pound presets in the calculator for a quick conversion.
An ounce (oz) measures mass. A fluid ounce (fl oz) measures volume.
Converting fluid ounces to pounds requires the substance’s density. US and imperial fluid ounces also differ in volume. This calculator converts avoirdupois weight ounces.
Multiply by 8, then double the result: 7 × 8 = 56, and 56 × 2 = 112. Therefore, 7 lb = 112 oz.
Remembering that half a pound is 8 ounces and a quarter pound is 4 ounces also makes everyday conversions easier.
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Conversion reference: National Institute of Standards and Technology (NIST), Handbook 44, Appendix C, General Tables of Units of Measurement.