Ounce to Pound Conversion Calculator: Free Online Tool
Convert ounces to pounds with our free online weight converter.
Ounce to Pound Calculator
How to Use the Calculator:
- Enter the value you want to convert in the 'From' field (Ounce).
- The converted value in Pound will appear automatically in the 'To' field.
- Use the dropdown menus to select different units within the Weight category.
- Click the swap button (⇌) to reverse the conversion direction.
How to Convert Ounce to Pound
Converting Ounce to Pound involves multiplying the value by a specific conversion factor, as shown in the formula below.
Formula:
1 Ounce = 0.0625 poundsExample Calculation:
Convert 5 ounces: 5 × 0.0625 = 0.3125 pounds
Disclaimer: For Reference Only
These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.
Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.
What is a Ounce and a Pound?
The ounce (oz) is a unit of mass used in the British imperial and United States customary systems of measurement. The most common type today is the international avoirdupois ounce, defined as exactly 1/16 of an avoirdupois pound, or approximately 28.35 grams.
The pound (avoirdupois) is a unit of mass used in the imperial and US customary systems. It is defined as exactly 0.45359237 kilograms.
Note: The Ounce is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Pound belongs to the imperial/US customary system.
History of the Ounce and Pound
The term "ounce" derives from the Roman "uncia", which was one-twelfth of the Roman pound. Its value varied throughout history and regions. The avoirdupois ounce became standardized in the English-speaking world for general trade.
Originates from the Roman 'libra'. The avoirdupois pound became the standard for commerce in England and was later adopted in the US.
Common Uses for ounces and pounds
Explore the typical applications for both Ounce (imperial/US) and Pound (imperial/US) to understand their common contexts.
Common Uses for ounces
- Cooking & Recipes: Standard unit in the US for measuring food ingredients like flour, sugar, spices, and non-liquid items in recipes.
- Packaged Foods: Used for labeling the net weight of many packaged food products (e.g., cereal boxes, canned goods, snacks).
- Postal Services: Used for determining the weight and cost of letters and small parcels, especially in the US.
- Deli & Groceries: Common unit for measuring small portions of items like cheese, deli meats, and specialty foods.
- Precious Metals: Often used to measure the weight of gold, silver, and other precious metals in jewelry and bullion.
Common Uses for pounds
- Body Weight: The primary unit for measuring human body weight in the United States, United Kingdom, and Canada, commonly seen on personal scales.
- Food & Groceries (US/UK): Standard unit for selling and pricing produce (e.g., apples, potatoes by the pound), meat, cheese, and deli items. Recipe ingredients are often measured in pounds or ounces.
- General Weight: Used for everyday weight measurements in non-scientific contexts in the US/UK, such as package weight for domestic shipping or luggage weight.
- Specific Applications: Sometimes used in technical fields like measuring tire pressure (pounds per square inch, PSI - though PSI is pressure, not mass) or fishing line strength (lb-test).
Frequently Asked Questions
Questions About Ounce (oz)
How many ounces are in a pound?
There are 16 avoirdupois ounces (oz) in 1 pound (lb).
Is an ounce the same as a fluid ounce?
No. The ounce (oz) measures mass/weight, while the fluid ounce (fl oz) measures volume.
Where is the ounce commonly used?
It is primarily used in the United States for everyday measurements, and to some extent in the UK and Canada, though metric units are more prevalent globally.
About Pound (lb)
What measurement system uses pounds?
The pound (lb) is a key unit in the imperial and US customary measurement systems.
Where is the pound commonly used?
Primarily in the United States, United Kingdom, and Canada for everyday measurements like body weight and groceries.
How many ounces are in a pound?
There are exactly 16 avoirdupois ounces (oz) in 1 avoirdupois pound (lb).
Conversion Table: Ounce to Pound
| Ounce (oz) | Pound (lb) |
|---|---|
| 1 | 0.063 |
| 5 | 0.313 |
| 10 | 0.625 |
| 25 | 1.563 |
| 50 | 3.125 |
| 100 | 6.25 |
| 500 | 31.25 |
| 1,000 | 62.5 |
All Weight Conversions
Other Units from Weight
- Kilogram (kg)
- Gram (g)
- Milligram (mg)
- Stone (st)
- Ton (metric) (t)
- Ton (US) (ton)
- Ton (UK) (long ton)
- Microgram (µg)
- Carat (ct)
- Slug (sl)
- Troy Ounce (oz t)
- Pennyweight (dwt)
- Grain (gr)
- Dram (dr)
- Quintal (q)
- Atomic Mass Unit (u)
- Pavan (India) (pavan)
- Kati (India) (kati)
- Masha (India) (masha)
- Dina (India) (dina)
- Pras (India) (pras)
- Lota (India) (lota)