Pounds to Ounces: 1 lb equals 16 oz. To convert pounds to ounces, multiply by 16 (oz = lb × 16). For example, 10 lb = 160 oz.
How to Convert Pounds to Ounces
To convert from pounds to ounces, multiply the value by 16. The conversion is linear, meaning doubling the input doubles the output.
Conversion Formula
- Pounds to Ounces:
oz = lb × 16 - Ounces to Pounds:
lb = oz ÷ 16
Pounds to Ounces Conversion Chart
| Pounds (lb) | Ounces (oz) |
|---|---|
| 0.1 | 1.6 |
| 0.25 | 4 |
| 0.5 | 8 |
| 1 | 16 |
| 2 | 32 |
| 3 | 48 |
| 5 | 80 |
| 10 | 160 |
| 20 | 320 |
| 25 | 400 |
| 50 | 800 |
| 100 | 1600 |
| 250 | 4000 |
| 1000 | 16000 |
Understanding the Units
What is a Pound?
The pound (avoirdupois) equals exactly 0.45359237 kilograms by the 1959 international yard and pound agreement.
From the Latin libra pondo ("pound by weight"), source of the abbreviation lb.
Common contexts: health, shipping, cooking (US).
What is an Ounce?
The avoirdupois ounce equals exactly 28.349523125 grams, or 1/16 of a pound.
Common contexts: cooking (US), postage, precious metals.
Real-World Reference Points
| Item | Pounds (lb) | Ounces (oz) |
|---|---|---|
| A loaf of bread | 1.5 | 24 |
| A bowling ball (max) | 16 | 256 |
| A standard US bag of flour | 5 | 80 |
How to Convert Pounds to Ounces
To convert pounds to ounces, multiply by 16. One avoirdupois pound is defined as exactly 16 ounces in the US customary and Imperial systems.
Conversion Formula
- Pounds to Ounces: oz = lb × 16
- Ounces to Pounds: lb = oz ÷ 16
Common Conversions
| Pounds | Ounces | Mixed |
|---|---|---|
| 0.25 | 4 | 4 oz |
| 0.5 | 8 | 8 oz |
| 0.75 | 12 | 12 oz |
| 1 | 16 | 1 lb 0 oz |
| 1.5 | 24 | 1 lb 8 oz |
| 2 | 32 | 2 lb 0 oz |
| 2.5 | 40 | 2 lb 8 oz |
| 3 | 48 | 3 lb 0 oz |
| 3.5 | 56 | 3 lb 8 oz |
| 5 | 80 | 5 lb 0 oz |
| 7.5 | 120 | 7 lb 8 oz |
| 8 | 128 | 8 lb 0 oz |
| 12 | 192 | 12 lb 0 oz |
| 15 | 240 | 15 lb 0 oz |
| Pounds | Ounces | Mixed | Grams |
|---|---|---|---|
| 1.75 | 28 | 1 lb 12 oz | 793.8 |
| 3.5 | 56 | 3 lb 8 oz | 1587.6 |
| 7 | 112 | 7 lb 0 oz | 3175.1 |
| 17.5 | 280 | 17 lb 8 oz | 7937.9 |
| 35 | 560 | 35 lb 0 oz | 15875.7 |
Common Items by Weight
| Item | Ounces | Pounds |
|---|---|---|
| AA battery | ~1 oz | 0.06 lb |
| Slice of bread | ~1 oz | 0.06 lb |
| Stick of butter | 4 oz | 0.25 lb |
| Baseball | ~5 oz | 0.31 lb |
| Can of soda (12 fl oz) | ~13 oz | 0.81 lb |
| Basketball | ~22 oz | 1.38 lb |
| Bag of sugar (small) | 64 oz | 4 lb |
| Bag of flour | 80 oz | 5 lb |
| Gallon of water | ~133 oz | 8.34 lb |
| Bowling ball (avg) | ~208 oz | 13 lb |
Understanding the Units
What Is a Pound?
The pound (lb) is a unit of mass in the Imperial and US customary systems. One avoirdupois pound is defined as exactly 0.45359237 kilograms. The abbreviation "lb" comes from the Latin libra, a Roman unit of weight roughly equal to 328.9 grams. Today the pound is used widely in the United States, the United Kingdom (alongside metric), and a few other countries for everyday weighing.
What Is an Ounce?
The ounce (oz) is 1/16 of an avoirdupois pound, equal to approximately 28.3495 grams. The word derives from the Latin uncia, meaning "one-twelfth" — a reference to the original Roman division of the libra into 12 unciae. In the modern avoirdupois system the pound was redivided into 16 ounces, but the name stuck. Do not confuse the mass ounce with the fluid ounce (fl oz), which measures volume.
Pounds and Ounces in Cooking
American recipes commonly specify ingredients in ounces or pounds. Butter is sold in 4 oz sticks (¼ lb each), flour bags are typically 5 lb (80 oz), and produce scales at the grocery store display weight in decimal pounds. When scaling recipes you'll frequently convert between the two — for instance, doubling a recipe calling for 6 oz of cheese means you need 12 oz, or ¾ lb.
Related cooking converters: cups of butter to sticks, ounces of butter to grams, and ounces to grams.
Brief History
The pound and ounce trace back to ancient Rome. The Roman libra pondo ("a pound by weight") gave English the word "pound" while its abbreviation "lb" comes from libra. The uncia, one-twelfth of a libra, eventually became the English "ounce."
During the Middle Ages, various European pound standards emerged. English merchants gradually adopted a 16-ounce pound — the avoirdupois pound — for trade goods, because 16 divides cleanly into halves, quarters, and eighths, making mental arithmetic at the market stall far easier than the older 12-ounce system.
The modern avoirdupois pound was fixed internationally on 1 July 1959 by the International Yard and Pound Agreement, signed by the United States, United Kingdom, Canada, Australia, New Zealand, and South Africa. It defined the pound as exactly 0.453 592 37 kilograms, ending minor national variations that had persisted for centuries.