Units
How Many Ounces Are in a Pound?
Published · By Convert & Calculate Everything
A pound is 16 ounces, or 453.592 grams, so an ounce is 28.35 grams. Half a pound is 8 oz and a quarter pound 4 oz. The charts below convert ounces to pounds, grams and kilograms, and explain troy ounces for gold and silver and how ounces differ from fluid ounces.
There are 16 ounces in a pound. One pound is exactly 453.59237 grams, so one ounce is 28.35 grams. Half a pound is 8 oz (226.8 g) and a quarter pound is 4 oz (113.4 g).
These are avoirdupois ounces and pounds, used for food, people and parcels. Gold and silver are weighed in troy ounces, which are about 10% heavier. To convert pounds to kilograms, use the lbs to kg converter.
Ounces to pounds and grams
To turn ounces into pounds, divide by 16: 40 oz ÷ 16 = 2.5 lb, or 2 lb 8 oz. To turn pounds into ounces, multiply by 16.
| Ounces | Pounds | Grams |
|---|---|---|
| 1 oz | 0.0625 lb | 28.35 g |
| 2 oz | 0.125 lb | 56.70 g |
| 4 oz | 0.25 lb | 113.40 g |
| 6 oz | 0.375 lb | 170.10 g |
| 8 oz | 0.5 lb | 226.80 g |
| 10 oz | 0.625 lb | 283.50 g |
| 12 oz | 0.75 lb | 340.19 g |
| 16 oz | 1 lb | 453.59 g |
| 24 oz | 1.5 lb | 680.39 g |
| 32 oz | 2 lb | 907.18 g |
| 48 oz | 3 lb | 1,360.78 g |
| 64 oz | 4 lb | 1,814.37 g |
Pounds to ounces, grams and kilograms
A kilogram is 35.27 ounces, or 2 lb 3.3 oz.
| Pounds | Ounces | Grams | Kilograms |
|---|---|---|---|
| 1/4 lb | 4 oz | 113.4 g | 0.113 kg |
| 1/2 lb | 8 oz | 226.8 g | 0.227 kg |
| 1 lb | 16 oz | 453.6 g | 0.454 kg |
| 2 lb | 32 oz | 907.2 g | 0.907 kg |
| 2.2 lb | 35.2 oz | 997.9 g | 0.998 kg |
| 5 lb | 80 oz | 2,268 g | 2.268 kg |
| 10 lb | 160 oz | 4,536 g | 4.536 kg |
Troy ounces for gold and silver
Precious metals are priced per troy ounce, 31.1035 g, which is 9.7% more than an ordinary ounce (28.3495 g). A troy pound has only 12 troy ounces, so it is lighter than a regular pound: 373.24 g instead of 453.59 g. When you see a gold price “per ounce”, it means per troy ounce.
Ounces and fluid ounces
An ounce (oz) measures weight; a fluid ounce (fl oz) measures volume. A pint of water, 16 fl oz, weighs about 16.7 oz, close to a pound, which gave rise to the saying “a pint’s a pound the world around.” For flour, sugar and other dry ingredients the two differ much more; see how many ounces are in a cup.
Where the pound and ounce come from
The name ounce comes from the Latin uncia, a twelfth, and the abbreviation lb from libra, the Roman pound. The avoirdupois pound of 16 ounces became the standard for trade in England; since 1959 the United States and the Commonwealth define it as exactly 0.45359237 kg.
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Use the free Lbs to Kg Converter
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Step by step: How Many Ounces in a Pound 16 oz and 453.6 Grams
- Start with 1 pound = 16 ounces.
- Multiply pounds by 16 to get ounces: 2.5 lb × 16 = 40 oz.
- Divide ounces by 16 to get pounds: 40 oz ÷ 16 = 2.5 lb.
- For grams, multiply ounces by 28.35 or pounds by 453.6.
Quick reference
t to mg
| t | mg |
|---|---|
| 0.5 t | 500,000,000 mg |
| 1 t | 1,000,000,000 mg |
| 2 t | 2,000,000,000 mg |
| 5 t | 5,000,000,000 mg |
| 10 t | 10,000,000,000 mg |
| 25 t | 25,000,000,000 mg |
| 50 t | 50,000,000,000 mg |
| 100 t | 100,000,000,000 mg |
| 250 t | 250,000,000,000 mg |
| 1,000 t | 1,000,000,000,000 mg |
Accuracy
How we checked this
We compared 4 results from this calculator with values we worked out independently, using exact decimal arithmetic and the published definitions, on October 26, 2026. 4 of 4 matched to the precision shown.
| Input | Independent value | This page | Match |
|---|---|---|---|
| 1 kg → lb | 2.204623 | 2.204623 | Yes |
| 100 g → oz | 3.527396 | 3.527396 | Yes |
| 10 st → kg | 63.502932 | 63.502932 | Yes |
| 1 lb → g | 453.59237 | 453.59237 | Yes |
From the source
NIST Special Publication (SP) 811, Appendix B is an essential source when exact unit conversion factors are needed.
Sources
GOOD TO KNOW
Frequently asked questions
How many ounces are in half a pound?
8 ounces (226.8 g).
How many grams are in a pound?
453.59237 grams exactly, usually rounded to 453.6 g.
How many pounds is 20 ounces?
1.25 pounds, or 1 lb 4 oz.
How many ounces are in a kilogram?
35.274 ounces.
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