Pounds to Ounces Converter
Enter the weight in pounds below to convert it to ounces.
Convert Pounds to Ounces
Enter a value in pounds (lb) to convert to ounces (oz).
Pound to Ounce Conversion Table
Table showing various pound measurements converted to ounces. Click any preset value or arrow to load it into the converter.
How to Convert Pounds to Ounces
To convert pounds to ounces, multiply the weight by the following conversion ratio: 16 ounces/pound.
Since one pound is equal to 16 ounces, you can use this simple formula to convert:
The weight in ounces is equal to the weight in pounds multiplied by 16.
For example, here's how to convert 2.5 pounds to ounces using the formula above.
How Many Ounces Are in a Pound?
There are 16 ounces in a pound, which is why we use this value in the formula above.
Our pound to ounce calculator automatically converts your weight measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Pounds and ounces are both units used to measure weight. Keep reading to learn more about each unit.
What Is a Pound?
A pound is a unit of weight equal to 0.4535924 kilograms (kg), the base unit for weight. Imperial and US Customary unit defined legally as exactly 0.45359237 kg. [1]
The pound is classified as a US customary and imperial unit of weight. Pounds can be abbreviated as lb; for example, 1 pound can be written as 1 lb.
When working with pounds (lb) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, pounds (lb) are widely used across standard weight applications within US customary and imperial workflows, engineering documentation, and technical data sheets.
What Is an Ounce?
An ounce is a unit of weight equal to 0.0283495 kilograms (kg), the base unit for weight. Equal to 1/16 of a pound (approx. 28.3495 grams). [2]
The ounce is classified as a US customary and imperial unit of weight. Ounces can be abbreviated as oz; for example, 1 ounce can be written as 1 oz.
When working with ounces (oz) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, ounces (oz) are widely used across standard weight applications within US customary and imperial workflows, engineering documentation, and technical data sheets.
When converting weight between pounds (lb) and ounces (oz), keep full floating-point precision (1 lb = 16 oz; 1 oz = 0.0625 lb) during intermediate calculations and round only the final ounce figure to match your instrument tolerance.
More Pound & Ounce Conversions
Need to calculate in the opposite direction? Use our ounces to pounds converter (oz to lb) to switch your starting unit immediately. You can also explore related tools such as converting grams to ounces, converting kilograms to ounces, or converting pounds to kilograms.
Convert from Pounds
Weight and volume require ingredient density (g/mL). Choose a USDA FoodData Central verified ingredient below:
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Mass)·Mass & Weight Metrology Standard — Pounds (lb) to Ounces (oz)
- [2]NIST HB 44 SpecificationNIST HB 44 (NIST Handbook 44 (Current Ed.))·Unit Specifications: Pound (Avoirdupois) (lb) & Ounce (oz)
- [3]BIPM ReferenceBIPM (SI Base Unit: Kilogram (kg))·Conversion Factors & Mathematical Basis (lb to oz)