Convert weight and mass units — kilograms, pounds, ounces, grams, tons, stones.
| Unit | Name | Value |
|---|---|---|
| kg | Kilogram | 0.453592 |
| g | Gram | 453.592 |
| mg | Milligram | 453592 |
| t | Metric Ton | 0.000453592 |
| oz | Ounce | 16 |
| st | Stone | 0.071428549 |
The Pound (lb) and the Ounce (oz) are both units of weight & mass. Converting between them is straightforward using the formula above.
Formula: 1 lb = 16 oz
This converter uses internationally recognized conversion factors. All calculations are performed client-side in your browser — no data is sent to any server.
| Pound (lb) | Ounce (oz) | Real-world context |
|---|---|---|
| 0.1 lb | 1.6 oz | |
| 1 lb | 16 oz | loaf of bread |
| 5 lb | 80 oz | bag of flour |
| 10 lb | 160 oz | small dog |
| 100 lb | 1600 oz | child |
1 pound (lb) equals exactly 16 ounces (oz). Use the formula: lb × 16 = oz.
To convert pounds to ounces, multiply your value in pounds by 16. For example, 5 lb × 16 = 80 oz.
100 pounds = 1600 ounces. Calculation: 100 × 16 = 1600.
To convert ounces back to pounds, divide by 16 (or multiply by 0.0625). Example: 10 oz ÷ 16 = 0.625 lb.
Yes. This converter uses the internationally recognised exact conversion factor: 1 lb = 16 oz. All calculations are performed in your browser with no rounding until display.
10 pounds = 160 ounces. Simply multiply by 16.
Converting pounds to ounces is commonly needed for everyday tasks like cooking recipes, body weight tracking, shopping internationally, or shipping parcels where one system uses lb and another uses oz.
The pound (lb) is the primary unit of mass in the US customary and British imperial systems, equal to exactly 453.59237 grams since the International Yard and Pound Agreement of 1959. It is subdivided into 16 ounces. The abbreviation "lb" comes from the Latin libra (scales/balance), while "pound" derives from Latin pondus (weight).
The avoirdupois ounce (oz) equals exactly 28.349523125 grams or 1/16 of an avoirdupois pound. It is widely used in the US and UK for food portions, product packaging, and everyday measurements. Note that the troy ounce (31.1035 g), used for precious metals like gold and silver, is a different and heavier unit than the avoirdupois ounce.
The pound traces its origins to ancient Rome's libra pondo (pound weight, ~329 g). Various standards existed in medieval Europe — Troy, Tower, and merchant pounds — until the avoirdupois pound emerged in 13th–14th century England for general trade. The British Weights and Measures Act 1878 formalised it. The modern definition (453.59237 g) was fixed by the US, UK, Australia, Canada, New Zealand, and South Africa in 1959.
Interesting fact: The word "pound sterling" originally meant one pound (12 troy ounces) of sterling silver. Today's British pound currency takes its name from the unit of mass, not the other way around.
The word "ounce" derives from Latin uncia (a twelfth), originally 1/12 of the Roman pound. The avoirdupois ounce developed in medieval England specifically for the wool trade, creating a 16-ounce pound distinct from the Troy 12-ounce pound. The British Imperial system codified the ounce in 1824. The modern exact definition (28.349523125 g) was set by the 1959 International Yard and Pound Agreement.
Interesting fact: A troy ounce (31.1 g) used for gold is heavier than an avoirdupois ounce (28.35 g) used for food — so an "ounce" of gold contains more metal than an "ounce" of flour. A standard large hen's egg weighs approximately 56–63 grams (about 2 oz).