Ounce to Pound Converter
Weight · unit-converter
Convert Ounce to Pound with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use gram-based factors (international avoirdupois pound and metric definitions). The full Weight Converter also includes carat, grain, and US/UK hundredweight.
Calculator
From: Ounce (oz)
To: Pound (lb)
About Ounce
The avoirdupois ounce is 1/16 of an avoirdupois pound (about 28.35 g). Cooking and postal weights often use ounces.
About Pound
The international avoirdupois pound is exactly 0.45359237 kg. It is the standard pound for weight in the US and for many trade weights.
How to convert ounces to pounds
1 ounce is equal to 0.0625 pound:
1 oz = (28.349523125 g ÷ 453.59237 g) lb = 0.0625 lb
1 ounce = 1/16 pound (avoirdupois).
Each ounce is defined as 28.349523125 g and each pound as 453.59237 g, so one oz equals 28.349523125 ÷ 453.59237 lb = 0.0625 lb.
Let w(oz) be the numeric value of the same mass measured in Ounce (oz), and w(lb) the value in Pound (lb). Then:
w(lb) = w(oz) × (28.349523125 / 453.59237)
Equivalently, divide by how many oz fit into one lb (grams per lb divided by grams per oz):
w(lb) = w(oz) ÷ 16
Or: pound = ounce ÷ 16
Examples
Example #1: Convert 20 oz to pound
20 oz = 20 oz × (28.349523125/453.59237) lb = 1.25 lb
20 oz = 20 oz ÷ 16 = 1.25 lb
Example #2: Convert 50 oz to pound
50 oz = 50 oz × (28.349523125/453.59237) lb = 3.125 lb
50 oz = 50 oz ÷ 16 = 3.125 lb
Summary
To convert Ounce to Pound, multiply the value in oz by the ratio of grams per oz divided by grams per lb. Equivalently: value_lb = value_oz × (28.349523125 / 453.59237). Numerically, 1 oz equals 0.0625 lb.
Relationship context
Both units belong to imperial / UK (stone, long ton, pound, ounce). Relationships such as 16 oz per lb and 14 lb per stone are exact in the avoirdupois system; tons use fixed pound counts. This tool uses international definitions tied to the kilogram.
Conversion tables
| Ounce (oz) | Pound (lb) |
|---|---|
| 0.1 | 0.00625 |
| 1 | 0.0625 |
| 2 | 0.125 |
| 3 | 0.1875 |
| 4 | 0.25 |
| 5 | 0.3125 |
| 6 | 0.375 |
| 7 | 0.4375 |
| 8 | 0.5 |
| 9 | 0.5625 |
| Ounce (oz) | Pound (lb) |
|---|---|
| 10 | 0.625 |
| 20 | 1.25 |
| 30 | 1.875 |
| 40 | 2.5 |
| 50 | 3.125 |
| 60 | 3.75 |
| 70 | 4.375 |
| 80 | 5 |
| 90 | 5.625 |
| 100 | 6.25 |