conversions
How Many Ounces in a Pound
Last updated: May 31, 2026
Written by Blake Boege
An ounces-in-a-pound conversion page translates weight measurements between pounds and ounces. The standard Avoirdupois system, used for everyday packages and foods, defines 1 pound as exactly 16 ounces. The Troy system, used for precious metals like gold, defines 1 pound as exactly 12 troy ounces.
Convert between pounds and ounces instantly. Learn the difference between standard avoirdupois weight and the troy system used for precious metals.
Quick Answer
Determine how many ounces are in a pound (16 ounces in a standard pound) and convert pounds to ounces instantly.
How Many Ounces in a Pound?
There are 16 ounces in a standard pound.
In the troy weight system used exclusively for precious metals, there are only 12 troy ounces in a pound.
Weight Measurement System
Formula: 1 Pound = 16 Ounces (Avoirdupois)
Pounds to Ounces Reference Table (Avoirdupois)
| Pounds (lb) | Ounces (oz) |
|---|---|
| 1/8 lb | 2 oz |
| 1/4 lb | 4 oz |
| 1/2 lb | 8 oz |
| 3/4 lb | 12 oz |
| 1 lb | 16 oz |
| 2 lb | 32 oz |
| 5 lb | 80 oz |
| 10 lb | 160 oz |
Examples
1/4 Pound
4 oz
1/2 Pound
8 oz
1 Pound
16 oz
How it works
In the standard Avoirdupois weight system used for food, packages, and body weights, a pound is divided into 16 ounces:
Standard Weight Conversion
1 Pound = 16 Ounces
Conversion Formula
Multiply pounds by 16 to get standard ounces. Divide ounces by 16 to get pounds.
Avoirdupois vs. Troy System
Almost all daily weight measurements use the Avoirdupois system. However, gold, silver, platinum, and other precious metals are measured in the Troy system:
| System | Ounces per Pound | Single Ounce in Grams | Total Pound in Grams |
|---|---|---|---|
| Avoirdupois (Standard) | 16 oz | 28.35 g | 453.59 g |
| Troy (Precious Metals) | 12 t oz | 31.10 g | 373.24 g |
Baby and Birth Weights
Newborn birth weights are traditionally announced in both pounds and ounces. For example, a baby weighing 7 pounds 8 ounces is equivalent to exactly 7.5 pounds (since 8 ounces is half of a pound). Our converter assists parents and medical providers in scaling total weights back into precise decimal values.
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Frequently asked questions
There are exactly 8 ounces in a standard half-pound (16 ÷ 2).
The division is historical. The standard Avoirdupois system is based on an old English system that divided a pound of physical goods (wool, grain, metals) into 16 ounces. The word 'ounce' comes from the Latin 'uncia', which refers to a twelfth part, but trade systems evolved to utilize base-16 for easier fractional divisions (halving weights down to 1/2, 1/4, 1/8, and 1/16).
No. A troy ounce is heavier. A standard avoirdupois ounce is approximately 28.35 grams, whereas a troy ounce is approximately 31.10 grams. However, a troy pound contains only 12 troy ounces, making a troy pound (373.24g) lighter than a standard avoirdupois pound (453.59g).
There are exactly 80 ounces in 5 pounds (5 × 16).
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